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... In Italy the âminimal pruning systemâ (a definition derived from the grapevine pruning technique) is generally utilized in peach orchards. One of its main rules is to initially obtain a âfree spindle bushâ shape, avoiding cutting back the scion at planting time but using lateral shoots to form future fruiting branches. This experiment involved a comparison of three high density peach plots ...
... ‘Ebony Embers’, ‘Ebony Fire’, ‘Ebony Flame’, ‘Ebony Glow’ and ‘Ebony and Ivory’ are cultivars which are predominantly L. indica in heritage that combine persistent black-purple leaves and a range of flower colors with intermediate growth habits. ‘Ebony Embers’ has a vase shaped growth habit with dimensions of 1.9 m tall and 1.1 m wide at 4 years and is the last of the five clones to flower. Leaves ...
... Plants can complete an entire life cycle in uniform environments. This is evidence that while shoot apices reiterate leaf formation they also change as a function of their own development. These changes occur in individual apices rather than the plant as a whole, and they are most closely correlated with the number of nodes an apex has formed. Evidence about the mechanism of 'node counting' sugges ...
... A pair of undescribed bicoumarin enantiomers, (P)/(M)-corinepalensin A, two undescribed prenylated coumarins, corinepalensins B and C, along with ten known coumarins were isolated from the twigs of Coriaria nepalensis. (P)/(M)-corinepalensin A feature a rare C-5C-5′ axially chiral linkage between two prenylated coumarin monomers. Their structures were determined by a combination of spectroscopic m ...
... At present, about 50% of the young fruit trees is stored for more than one month in cold rooms between lifting in the nursery and planting in spring in the orchard with a maximum storage duration of 5-6 months. Storage of fruit trees requires the absence of ethylene in the storage room, as this gaseous plant growth regulator may induce damage to the trees during storage, which eventually may lead ...
... Analysis of ¹³⁷Cs trapped in biomass in highly contaminated zones is crucial in predicting the long-term fate of ¹³⁷Cs following the explosion at the Fukushima Daiichi Nuclear Power Plant. We surveyed forest 20–50 km from the plant in July and September 2011 to evaluate ¹³⁷Cs trapped in biomass within 20 km of the plant. We determined the ambient dose rate and collected forest soils and twigs at 1 ...
... To study the effect of fruit position on the stem on photoassimilate partitioning in two Iranian melon cultivars (Suski-Sabz and Jalali-Zard), a greenhouse experiment was conducted. Three fruit positions (retaining one fruit on 3rd, 7th or 11th node of two lateral branches) and three leaf positions for 13C-labelling (3rd, 8th or 12th leaf from the base of one branch) were compared during the exper ...
absorption; apples; branches; fine roots; fruits; leaves; nitrogen; nitrogen content; nutrient use efficiency; shoots; summer; trees; urea
Abstract:
... Total nitrogen (N) concentration (N%), N derived from ¹⁵N-fertilizer (Ndff%), amount of ¹⁵N uptake (ANU) in main organs (leaves, shoots, roots, fruits), and N use efficiency (NUE) were measured to assess N absorption, distribution, and utilization of Red Fuji apple trees across two years using a ¹⁵N-enriched urea method. The N% in leaves and fruits decreased while those in shoots and roots increas ...
... In 1998, thirty-four managed sugar bush blocks with 7% to 72% ice-induced crown damage were established in eastern Ontario. All received dolomitic lime (Ca, Mg) and P and K treatments in June 1999. Initial crown damage, fall root starch and sugar levels, sap production and sweetness, sap amino acid concentration, and tap hole closure rate were measured. Syrup production was calculated. Trees with ...
Sceletium tortuosum; alkaloids; anxiety; brain; branches; chemometrics; diodes; mass spectrometry; metabolomics; methanol; models; nuclear magnetic resonance spectroscopy; pinitol; quantitative analysis; receptors; ultra-performance liquid chromatography; South Africa
Abstract:
... Sceletium tortuosum (Aizoaceae) is widely recognised for the treatment of stress, anxiety and depression, as well as for obsessive compulsive disorders. A comprehensive intraspecies chemotypic variation study, using samples harvested from two distinct regions of South Africa, was done using both proton nuclear magnetic resonance (1H-NMR) spectroscopy of methanol extracts (N = 145) and ultra perfor ...
... Quisqualis indica is used in traditional Chinese medicine to treat cancer and related syndromes and also known for its anthelminthic effects.Soft tissue sarcomas represent a rare group of malignant tumors that frequently exhibit chemotherapeutic resistance and increased metastatic potential. In this study, we evaluated the cytotoxic, apoptosis inducing and cell cycle arresting effects of 25-O-acet ...
... In this work, we develop two-dimensional models based on the non-local density functional theory (2D-NLDFT) for the analysis of pore size distribution (PSD) of oxide materials with cylindrical pores with rough and heterogeneous walls. The existing standard NLDFT models for porous oxides assume the smooth energetically uniform surface of the pore walls. Due to this assumption, the calculated theore ...
Zelkova serrata; branches; lidar; models; spatial variation; trees
Abstract:
... We developed a method to produce a 3-D voxel-based solid model of a tree based on portable scanning lidar data for accurate estimation of the volume of the woody material. First, we obtained lidar measurements with a high laser pulse density from several measurement positions around the target, a Japanese zelkova tree. Next, we converted lidar-derived point-cloud data for the target into voxels. T ...
Fernanda L. S. Sebastianes; Nuria Cabedo; Noureddine El Aouad; Angela M. M. P. Valente; Paulo T. Lacava; João L. Azevedo; Aline A. Pizzirani-Kleiner; Diego Cortes
... Endophytic fungi are considered a rich source of active compounds resulting from their secondary metabolism. Fungi from marine environment grow in a habitat with unique conditions that can contribute to the activation of metabolic pathways of synthesis of different unknown molecules. The production of these compounds may support the adaptation and survival of the fungi in the marine ecosystem. Man ...
Rutaceae; branches; coumarins; nuclear magnetic resonance spectroscopy; spectral analysis
Abstract:
... The twigs of Rhadinothamnus rudis ssp. amblycarpus (Phebalium rude ssp. amblycarpum) yielded three new 3-substituted coumarins: rudicoumarin A-C (1- 3). Their structures were established on the basis of their NMR and mass spectral data. In addition, ten other known compounds were also isolated, including phebaclavin I, schinicoumarin, seselin, and seven linear furocoumarins. ...
... A general review is given of our present knowledge concerning marine midges in various parts of the world. These belong to several genera, and appear to have been derived from different branches of one tribe (Orthocladiariæ) of the family Chironomidæ. Some of the flies remain unmodified and may be found flying over rocks and seaweed; others have vestigial wings in one or both sexes, and these ar ...
... Accurate tree measurement is necessary for applications such as resource appraisal, and biophysical and ecological modelling. This research tests the potential to use a low-cost hand-held camera alongside structure-from-motion with multi-view stereo-photogrammetry (SfM-MVS) to accurately measure trees. SfM-MVS is a computer vision technique, in which the geographic coordinates of objects are calcu ...
anthocyanins; biosynthesis; branches; canopy; cultivars; leaves; mangoes; models; pigmentation; pruning; reflectance; shade; solar radiation; trees
Abstract:
... The fruit of certain mango cultivars (e.g., ‘Honey Gold’) can develop blush on their skin. Skin blush due to red pigmentation is from the accumulation of anthocyanins. Anthocyanin biosynthesis is related to environmental determinants, including light received by the fruit. It has been observed that mango skin blush varies with position in the tree canopy. However, little investigation into this sp ...
... Vibratory harvest is the most appropriate and efficient way to harvest Chinese hickory (Carya cathayensis Sarg.) nuts because of the hilly growth environment and scattered shooting architecture. To develop a mechanical harvester that can be adapted to different Chinese hickory trees, a three-dimensional (3D) model of the tree should be obtained and its dynamics parameters identified. This paper in ...
allometry; apples; branches; branching; canopy; data collection; ecophysiology; fruit growing; fruit yield; leaf angle; leaf area; leafminers; leaves; mangoes; microclimate; models; mortality; primary productivity; risk; rubber; trees; walnuts
Abstract:
... The geometrical structure of plant canopies has many implications for plant functioning, microclimatic conditions, and plant‐pathogen/herbivore interactions. Plant geometry can be described at several scales. At the finest scale, canopy structure includes the shape, size, location, and orientation of each organ in the canopy. This data set reports the three‐dimensional (3‐D) geometry of a set of f ...
... The causal agent of ash dieback, the hyphomycete Chalara fraxinea, was isolated from a Fraxinus excelsior cv. Pendula tree, in the Arboretum Křtiny between Křtiny and Jedovnice in Drahany Highland, and subsequently from several other locations in South Moravia in the Czech Republic. The infection was associated with severe twig dieback and symptoms of ash dieback were observed in ma ...
Marchantiophyta; bracts; branches; epiphytes; females; forests; leaves; mosses and liverworts; new species; plant taxonomy; India
Abstract:
... Chiloscyphus chinnarensis sp. nova, an autoicous, epiphytic leafy liverwort, with prostrate thin leafy shoot, closely imbricate, bluntly bilobed leaves in some branches, deeply 2-lobed underleaves which varies in size and cell arrangements, both margin usually with one additional tooth below, and having non-ciliate bracts in female inflorescence is described from the tropical wet evergreen ...
Mediterranean climate; adults; branches; canopy; dry environmental conditions; seedlings; sexual reproduction; shrubs; space and time; Israel
Abstract:
... We describe and quantify the process of space occupation by the dwarf shrub, Sarcopoterium spinosum, in mesic and xeric Mediterranean environments. The shrubs were sampled in fifteen 2 m x 1 m plots in an arid Mediterranean site (Lahav, northern Negev, Israel) and in a 10-m2 patch in a sub-humid Mediterranean site (Elkosh, Galilee). The results revealed three clear stages of deve ...
Bayesian theory; ammonia; branches; computer software; hydrologic models; pollutants; rivers; seasonal variation; water quality; China
Abstract:
... Excessive pollutant discharge from multi-pollution resources can lead to a rise in downriver contaminant concentration in river segments. A multi-pollution source water quality model (MPSWQM) was integrated with Bayesian statistics to develop a robust method for supporting load (I) reduction and effective water quality management in the Harbin City Reach of the Songhua River system in northeastern ...
... Because resource movement is restricted within and among branches of woody plants, different patterns of folivory are likely to differentially affect plant fitness. I examined experimentally the effects of folivory pattern on growth and seed output in the understory tropical wet forest shrub Piper arieianum (Piperaceae) in Costa Rica. I removed 10% of a plant's leaf area in two constrating manners ...
... Immature zygotic embryos from the Spanish self-pollinated sunflower line Z-8-A (Helianthus annus L.) were used as donor material to induce direct organogenesis. A portion of the isolated immature embryos were treated with gamma radiation (¹³⁷Cs) at a dose of 5 Gy before plating. The range of the spontaneously induced somaclonal variation among the obtained regenerants was investigated and compared ...
... Accurate biomass estimations are important for assessing and monitoring forest carbon storage. Bayesian theory has been widely applied to tree biomass models. Recently, a hierarchical Bayesian approach has received increasing attention for improving biomass models. In this study, tree biomass data were obtained by sampling 310 trees from 209 permanent sample plots from larch plantations in six reg ...
... Hybrid eucalypt clones are grown for fiber production worldwide and to provide an ecosystem service that can store atmospheric carbon at a very fast rate. This study assessed the carbon stocks in the soil and various tree fractions in a 10-year-old plantation of Eucalyptus urophylla S.T. Blake × Eucalyptus globulus Labill. in Southern Brazil. Four experimental plots were established, and an ...
... The Quercus genus provides a large amount of biomaterial with many applications in fields like pharmaceutics, cosmetics, and foodstuff areas. Due to the worldwide dissemination of the genus, many species were used for centuries in traditional healing methods or in the wine maturing process. This review aims to bring together the results about phytoconstituents from oak extracts and their biologica ...
... Ship detection is a challenging task for synthetic aperture radar (SAR) images. Ships have arbitrary directionality and multiple scales in SAR images. Furthermore, there is a lot of clutter near the ships. Traditional detection algorithms are not robust to these situations and easily cause redundancy in the detection area. With the continuous improvement in resolution, the traditional algorithms c ...
algorithms; biomass; branches; cleaning; data collection; ecosystems; forest canopy; forests; habitats; leaf area; leaf area index; leaves; lidar; models; national parks; reflectance; remote sensing; scanners; species diversity; vegetation cover; volcanoes; water uptake; wavelengths; Hawaii
Abstract:
... Forests are an important part natural ecosystems, by for example providing food, fiber, habitat, and biodiversity, all of which contribute to stable natural systems. Assessing and modeling the structure and characteristics of forests, e.g., Leaf Area Index (LAI), volume, biomass, etc., can lead to a better understanding and management of these resources. In recent years, Terrestrial Laser Scanning ...
... Defoliation, dieback and mortality of Satsuma mandarin (Citrus unshiu), as well as kumquat (Fortunella margarita), in Chenggu County, Shaanxi Province, China was first noticed in 2006 and caused substantial economic losses to citrus production. The incidence of leaves infected approached 100% in some badly infected orchards. The disease prevailed only in late winter and early spring, where early s ...
... We performed a manipulative field experiment to test for competitive effects of the stem galling sawfly (Euura lasiolepis) on three other gall—forming sawflies on arroyo willow (Salix lasiolepis). Within a willow clone, three branches were left untreated, three branches had E. lasiolepis females placed on them in nylon screen bags during that species' oviposition period, and three branches were ba ...
... Agar is a complex mixture of gel-forming polysaccharides. Gelling agents are very often used to provide proper support for plants grown in semisolid culture media. And agar is the most frequently used gelling agent in plant tissue culture media. Galactomannans, another group of gel-forming polysaccharides, consists of a (1 → 4)-linked β-D-mannopyranosyl backbone partially substituted at O-6 with D ...
Pinus contorta var. latifolia; branches; buds; models; shoots; spatial distribution; trees; British Columbia
Abstract:
... The aim of this work was to model the vertical location and number of branch primordia (buds) on the leader of lodgepole pine (Pinus contorta Doug. ex Loud.) trees in central British Columbia. For species such as lodgepole pine, where branches occur in clusters rather than individually, the Gamma-Poisson model provides a natural framework for describing and simulating the distribution of buds on t ...
... The alternative oxidase mediates the cyanide-resistant respiratory pathway in plant mitochondria. In non-thermogenic plants, the role of alternative oxidase in plant growth and development is not well understood. Soybean (Glycine max) lines carrying a GmAOX2b antisense gene had compromised vegetative growth and reproductive performance under typical glasshouse growth conditions. The reduction in v ...
... A harvester for guayule, Parthenium argentatum, seed was designed and field tested. As the machine moves along the plant row, vertically oriented rods strike the branches and dislodge seeds while a series of movable plates form a surface to catch the seeds. Field tests indicated an average of 15% more seed per hectare was harvested with this machine than with a previous design. Based on the test r ...
... Parasitic plants rely on host plants for nutrition. The number of host species varies largely between groups, from single species or genus to hundreds of species. Relative abundance of the host and evolutionary history are the main requisites for parasitic plants to develop specificity to abundant hosts. In the present study, we suggest a novel mechanism by which a hemiparasitic mistletoe can deve ...
... This study was conducted to test the impact of the nutrient solution temperature and the application of different stress treatments at tuberization on several growth variables for two potato cultivars grown in an aeroponic system. At 25 days after transplanting, low pH level, wilting stress and nitrogen withdrawal under warm (24 °C) and cool (18 °C) root-zone temperatures were applied to potato pl ...
... Rice (Oryza sativa) is one of the most important food crops in the world. Numerous quantitative trait loci or genes controlling panicle architecture have been identified to increase grain yield. Yet grain yield, defined as the product of the number of well-ripened grains and their weight, is a complex trait that is determined by multiple factors such as source, sink and translocation capacity. Mec ...
... A new form of heat—flow analysis was developed to measure water transport in tree trunks. The application of the energy budget required the installation of heat—flow plates and thermocouples under the bark to measure the natural heat exchange between the water—conducting layer of xylem and the adjacent parts of the tree. The equipment was installed on two large branches of an ash tree and on the m ...
... Characteristics describing below canopy vegetation are important for a range of forest ecosystem applications including wildlife habitat, fuel hazard and fire behaviour modelling, understanding forest recovery after disturbance and competition dynamics. Such applications all rely on accurate measures of vegetation structure. Inherent in this is the assumption or ability to demonstrate measurement ...
Abies amabilis; branches; canopy; leaves; models; plant growth; seedlings; tree crown; trees
Abstract:
... The model of competition for light presented here uses modular autonomy to incorporate plasticity in plant growth under competition. Once plants are characterized as composed of modules, then model structure for competition changes in a fundamental way. Interactions between the plant module and its local resource environment must be modeled rather than the traditionally viewed interactions between ...
... A modular system for studying the biology of Scolytinae using 3D printed emergence traps is presented. This system consists of traps that can be used for the introduction of beetles into trees as well as for the determination of the number of offspring emerging from trees and branches, and their production of frass and sawdust. Open-source files used for printing these traps have been deposited as ...
Anthurium; tropical forests; plant taxonomy; data collection; tropics; nuclear genome; monophyly; intergenic DNA; species diversity; branches; introns; chloroplasts; Argentina; Mexico
Abstract:
... Anthurium is a strictly Neotropical genus of Araceae ranging from southern Mexico to northern Argentina, including approximately 900 accepted species names. Despite its immense diversity, its ecological importance in Neotropical forests, and a long history of botanical collection, cultivation, and taxonomical research, Anthurium has been only cursorily sampled in previous molecular phytogenies. Th ...
... In recent years, with the rapid development of computer vision, increasing attention has been paid to remote sensing image scene classification. To improve the classification performance, many studies have increased the depth of convolutional neural networks (CNNs) and expanded the width of the network to extract more deep features, thereby increasing the complexity of the model. To solve this pro ...
branches; evolution; radiometry; remote sensing; surveys; tree crown; trees; watersheds; wavelet; California
Abstract:
...
This paper presents a multi-scale approach for delineating individual tree crowns (ITC) from high spatial resolution imagery. By analyzing the evolution of image gradients over the scale-space constructed with orthogonal wavelets, tree crown boundaries are effectively strengthened while the textures resulted from tree branches and twigs are largely suppressed. Two scale consistency checks, a ...
... A new 5(6→7)abeo-sterol with rarely reported [6–5-6–5]-fused rings, 3 β ,5 β ,6-trihydroxyl- B -norsitostane (1), along with 10 known compounds were isolated from the twigs of Podocarpus fleuryi . Their structures were elucidated by means of extensive spectroscopic analysis. Compound 1 was assessed for their cytotoxicity against five human tumour cell lines (HL-60, SMMC-7721, A-549, MCF-7 and SW-4 ...
... A pot experiment were conducted at the research farm of Central Institute of Medicinal and Aromatic Plant, Research Centre, Pantnagar (Udham Singh Nagar) Uttarakhand, India, during 2013 to ascertain the response of nipping (cutting of apical portion in each branch of mint) on yield and yield contributing characters of mint (Mentha arvensis). The results revealed that, nipping of mint (Mentha arven ...
... A new aristolactam alkaloid was isolated from twigs and leaves of Michelia compressa var. compressa (Magnoliaceae). The structure of the new aristolactam alkaloid was elucidated by chemical and physical evidence. ...
... A new species of Bernardia with stellate trichomes from the Brazilian Cerrado is described and illustrated. Bernardia allemii is most similar to B. gardneri, but differs by its multi-stemmed, subshrub habit, broader leaf blades, tomentose old branches, staminate bracteoles that are usually reniform to flabellate, and larger sepals and bracts in the pistillate flowers. Photographs, a distribution m ...
Malus; Phacidiopycnis; apples; branches; dieback; fungi; inoculum; trees; Washington (state)
Abstract:
... This is the first report of this fungus causing cankers and twig dieback on crabapple trees. Our findings indicate that canker symptoms on crabapple trees caused by P. washingtonensis are similar to those caused by S. pyriputrescens and that infected crabapple trees may serve as a source of P. washington ensis inoculum for infection of apple. ...
... A new diarylheptanoid glycoside, acutissioside A (4), along with five known diarylheptanoids (1–3, 5, 6) was isolated from the twigs of Quercus acutissima Carruth. The structure of the new compound was determined via spectral analysis, including NMR spectra (¹H and ¹³C NMR, ¹H–¹H COSY, HSQC, HMBC) and HR-ESI-MS, acid hydrolysis, and specific optical rotation data. The neuroprotective effect of all ...
Juniperus sabina; branches; chemistry; electrospray ionization mass spectrometry; glycosides; leaves; nuclear magnetic resonance spectroscopy
Abstract:
... The structure of a new flavone glycoside isolated from twigs and leaves of Juniperus sabina was established as isoscutellarein 7-O-β-D-rhamnopyranosyl-(1→3)-α-L-xylopyranoside by spectroscopic methods, including 1D and 2D (¹H–¹H COSY, HSQC, and HMBC) NMR and ESI-MS. ...
Clausena lansium; branches; chemistry; coumarin; leaves; mass spectrometry; nuclear magnetic resonance spectroscopy; spectral analysis
Abstract:
... A new furan-coumarin, claulancoumarin (1), together with a known coumarin, clausenalansimin A (2), were isolated from the branches and leaves of Clausena lansium. Their structures were elucidated by spectroscopic analysis, including high-resolution mass spectroscopy, and IR, UV, and 1D and 2D NMR techniques. ...
... A new lactone, 5R-methyl-3-heptatriacontyl-2(5H)-furanone (1), was isolated from the twigs of Cinnamomum cassia. The structure of the new compound was established on the basis of high-resolution MS, 1D and 2D NMR data. The absolute configuration was determined by electronic circular dichroism (ECD) analysis. ...
Trichilia; branches; electrospray ionization mass spectrometry; leaf extracts; leaves; nuclear magnetic resonance spectroscopy; spectral analysis
Abstract:
... A new limonoid, trichiliton B (1), was isolated from the twigs and leaves of Trichilia connaroides. Its structure was elucidated on the basis of spectroscopic analyses, including application of ESI-MS, HR-ESI-MS, UV, IR, 1D and 2D NMR techniques ...
aboveground biomass; branches; carbon sinks; data collection; forests; lidar; models; quantitative analysis; remote sensing; surveys; tree and stand measurements; tree height; trees; wood
Abstract:
... Tree-level information can be estimated based on light detection and ranging (LiDAR) point clouds. We propose to develop a quantitative structural model based on terrestrial laser scanning (TLS) point clouds to automatically and accurately estimate tree attributes and to detect real trees for the first time. This model is suitable for forest research where branches are involved in the calculation. ...
... Ruellia capotyra is described as a new species of Acanthaceae from the Atlantic Forest of Brazil, occurring in the states of Rio de Janeiro and Minas Gerais. This species was discovered during fieldwork in a natural forested area, and further details regarding its ecology and broader geographical distribution were clarified through the study of existing herbarium collections. Ruellia capotyra is a ...
Cinnamomum; Neotropics; biological nomenclature; branches; coasts; new combination; new species; petioles; plant taxonomy; stamens; Ecuador
Abstract:
... A new species of Cinnamomum Schaeff. from the Pacific coast of Ecuador is described and discussed. Cinnamomum latifolium van der Werff is distinctive for its broad triplinerved leaves with canaliculate petioles, densely pubescent young twigs, and 2-locular inner stamens. In addition, six species recently described in Aiouea Aubl. should, in this author's opinion, be placed within Cinnamomum. The n ...
Stipa; branches; inflorescences; leaves; new species; new variety; plant taxonomy; scientific illustration; taxon descriptions; China
Abstract:
... Stipa zhadaensis L.Q. Zhao & K. Guo sp. nova and S. turkestanica Hack. var. diyaensis L.Q. Zhao & K. Guo var. nov. (Poaceae) from Tibet, China, are described and illustrated. Stipa zhadaensis appears to be most closely related to S. roborowskyi of Stipa sect. Barbatae. It can be distinguished by the lax panicle with inclined branches exserted from uppermost leaf sheath at maturity, 20–28 mm long g ...
Prunus; branches; calyx; hypanthium; new species; petioles; scientific illustration; stone fruits; sympatry; taxon descriptions; Iran
Abstract:
... Amygdalus ghahremanii Maroofi, Attar & Vafadar, a new shrubby species of the genus Amygdalus L. (Rosaceae) from Iran, is described and illustrated. This new species was collected from Kurdistan Province in western Iran. The closest relative to A. ghahremanii is A. korshinskyi (Hand.-Mazz.) Bornm., which also occurs as a more or less widespread species in western and northwestern Iran and is a symp ...
Baryscapus; Dioryctria abietella; Pinus koraiensis; adults; biological control agents; branches; females; forest trees; hosts; insect larvae; males; new species; parasitism; parasitoids; photographs; pupae; scientific illustration; seeds; taxon descriptions; China
Abstract:
... Baryscapus dioryctriae Yang & Song sp. nov. (Hymenoptera: Eulophidae), a gregarious pupal and larval endo-parasitoid of Dioryctria pryeri Ragonot and Dioryctria abietella Denis & Schiffermüller (Lepidoptera: Pyralidae) is described and illustrated. The hosts are serious pests of the cones, seeds, and twigs of Pinus koraiensis Sieb. & Zucc., a predominant forest tree species in the northeastern Chi ...
Maytenus boaria; branches; dunes; flowers; leaves; new species; plant morphology; plant taxonomy; sandy soils; Brazil
Abstract:
... A new species of Maytenus is described and illustrated. Maytenus psammopliila is apparently endemic to the state of Bahia, where it grows in the sandy soils of dunes in ‘caatinga’ physiognomy. This species is recognized by its cylindrical or slightly flattened young twigs with lenticels, small ovate coriaceous leaves and inflorescences, reduced cymes with short pedicellate flowers. It resembles M. ...
Miconia; branches; calyx; forests; leaves; mountains; new species; plant ovary; plant taxonomy; trichomes; Brazil
Abstract:
... During the preparation of a monographic treatment for a group of Miconia from the Atlantic Forest, Brazil, a new species was detected and is presented here. Miconia ruschiana can be recognized among other species of Miconia sect. Glossocentrum by the terete branches, shortly plinerved leaves abaxially covered by non-lepidote stellate trichomes, panicles with glomerulate ending branches, large flow ...
Melastomataceae; branches; calyx; hypanthium; internodes; leaves; microscopy; new species; plant taxonomy; scientific illustration; stamens; taxon descriptions; trichomes; Brazil
Abstract:
... A new species of Microlicia (Melastomataceae) from Goiás state is described and illustrated, and a discussion on leaf microscopy is also provided. Microlicia chrysoglandulosa sp. nov. resembles M. martiana, M. psammophila, and M. tenuifolia by the slender and fastigiate branches, triangular sepals, and stamens with tetrasporangiate thecae. However, it differs by the remarkable indumentum of spheri ...
Asteraceae; blades; bracts; branches; conservation status; florets; leaves; monoecy; national parks; new species; plant taxonomy; reproductive system; Brazil
Abstract:
... Moquiniastrum glabrum is here described as a new species of Tribe Gochnatieae from the Chapada dos Veadeiros National Park, Goiás, Brazil. The new species is recognized by having a monoecious reproductive system, glabrous branches and leaf blades, 9–11-seriate involucral bracts, and 30–35 florets per capitulum, all of which are bisexual. Illustrations, comments, a preliminary conservation status, ...
... Photuris walldoxeyi Faust, new species, is described as a member of the Photuris versicolor species-group. It can be distinguished by its complex, unique flash-train + glow (FT+G) male courtship flash pattern, one of the most easily recognizable displays in North America. The primary FT+G male courtship pattern consists of a flash-train of 4–9 bright, quick, rhythmic pulses given every 0.4 seconds ...
Phyllanthus; branches; calyx; leaves; new species; scientific illustration; stamens; taxon descriptions; Amazonia; Brazil
Abstract:
... A new species of Phyllanthus L., P. aracaensis G. L. Webster ex Secco & A. Rosário (Phyllanthaceae), probably endemic to Amazonas State, is described and illustrated. In terms of its habit and overall appearance it is superficially close to P. myrsinites Kunth, a species with variable leaf morphology, which is widely distributed throughout the Amazon region. The new species may be distinguished fr ...
... Nowadays, fibers extracted from natural resources have a wide range of promising applications, including the prospect to be used as reinforcing material in polymer composites. In this context, the purpose of this study has been to extract fibers from different parts of the olive tree (leaves, small and large branches) and characterize their physico-chemical, thermal, and morphological properties u ...
... A new tetranortriterpenoid, named lenticellatumin (1), three known terpenoids, dysoxylumin C (2), eichlerianic acid (3) and dysoxylumin F (4), together with three ceramides, 1-O-β -D-glucopyranosyl-(2S,3S,4R,8Z)-2-N-(2’-hydroxytetracosanoyl) octadecasphinga-8-ene (5), (2S,3S,4R,8E)-2- N-(2’-hydroxytetracosanoyl) octadecasphinga-8-ene (6), (2S,3R,4E)-2-N-(2’-hydroxytetracosanoyl) octadecasphinga-4- ...
Gleason, Mark L.; Batzer, Jean C.; Sun, Guangyu; Zhang, Rong; Díaz Arias, Maria M.; Sutton, Turner B.; Crous, Pedro W.; Ivanović, Milan; McManus, Patricia S.; Cooley, Daniel R.; Mayr, Ulrich; Weber, Roland W.S.; Yoder, Keith S.; Ponte, Emerson M. del; Biggs, Alan R.; Oertel, Bernhard
... Sooty blotch and flyspeck (SBFS) fungi colonize the surface wax layer of the fruit of apple, pear, persimmon, banana, orange, papaya, and several other cultivated tree and vine crops. In addition to colonizing cultivated fruit crops, SBFS fungi also grow on the surfaces of stems, twigs, leaves, and fruit of a wide range of wild plants. The disease occurs worldwide in regions with moist growing sea ...
sympatry; vegetation types; anthers; branches; corolla; plant taxonomy; trichomes; color; appendages; new species; Tibouchina; leaves; Brazil
Abstract:
... Tibouchina caatingae, a new species of Melastomataceae (Melastomeae), is herein described and illustrated. This species has been collected only in areas covered by caatinga vegetation in Bahia State, Brazil, and is one of the few species of the family registered for this type of vegetation. Due to the type of habit, organization of leaves on the branches, and color of the petals, it is morphologic ...
... A novel phenylethanoid dimer, namely, jacraninoside A (1) and the five known constituents E/Z-acetoside (2), isoacetoside (3), cistanoside E (4), 6 '-acetylacetoside (5), and campneoside I (6) together with the seven flavonoids isoquercitrin (7), scutellarein 7-O-β -D-glucuronopyranoside methyl ester (8), apigenin 7-O-β -D-galacturonopyranoside (9), luteolin 7-O-β -D-glucuronopyranoside methyl est ...
... The sex pheromone of the leafminer Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) was deployed in a Florida citrus (Citrus spp.) grove by using a novel deployment device (IFM-413) containing SPLAT, a flowable formulation of an emulsified wax compound designed to provide slow release of semiochemicals. The device consisted of two disks connected by string. Each disk was loaded with 1 ...
... The 55-million-year history of equine phylogeny has been well-documented from the skeletal record; however, this is less true for the soft tissue structures that are now vestigial in modern horse. A recent study reported that two ligamentous structures resembling functional interosseous muscle II and IV were evident in Dutch Konik horses. The current study investigates this finding and compares it ...
... Studies of the foraging ecology of Downy Woodpeckers (Dendrocopos pubescens) at the University of Kansas Natural History Reservation indicate that there is intersexual partitioning of the foraging niche, seasonal variation in the relative frequency of the modes of foraging, variation in the mode of foraging on live versus dead trees, and seasonal variation in the use of live and dead trees. Partit ...
Cucumis sativus; branches; cucumbers; genes; genetic variation; genome-wide association study; phenotype; single nucleotide polymorphism; transactivators; transcription (genetics); transcriptome
Abstract:
... Rare genetic variants are abundant in genomes but less tractable in genome-wide association study. Here we exploit a strategy of rare variation mapping to discover a gene essential for tendril development in cucumber (Cucumis sativus L.). In a collection of >3000 lines, we discovered a unique tendril-less line that forms branches instead of tendrils and, therefore, loses its climbing ability. We h ...
Aphytis melinus; Encarsia; adults; bark; branches; field experimentation; grapefruits; instars; lemons; orchards; parasitism; parasitoids; trees; California
Abstract:
... Red scale populations in eight grapefruit trees in a grove in southern California were sampled over 18 mo. We established that the interior of the trees was an area of partial refugee from parasitism by the major control agent, the parasitoid Aphytis melinus, and also by Encarsia, which was the second major parasitoid in the system. The refuge (interior) population contained > 75% of the scale and ...
... The presence of a physical refuge (an area where mortality due to parasitism is very low) has been demonstrated for California red scale, a pest of citrus. Density of red scale is very high, and parasitism by the principal parasitoid wasp, Aphytis melinus DeBach, is low on the trunk and woody branches of citrus trees as compared with the exterior twigs and leaves. One possible explanation for the ...
Melastomataceae; branches; conservation status; cortex; ecology; flowers; leaves; national parks; new species; plant taxonomy; scientific illustration; stamens; taxon descriptions; taxonomic keys; Brazil
Abstract:
... Microlicia stenodonoides is herein described and illustrated. It is distinguished from other Microlicia species by its remarkable dwarf arboreal habit, main stem 5–10 cm in diameter with leaf scars, leaves up to 4.5 cm long, grouped in the apex of terminal branches, and large flowers (up to 4 cm in diameter). The set of characters presented by M. stenodonoides is similar to that of species of the ...
Cleome hassleriana; Crateva; branches; calyx; common names; fruits; lakes; new species; plant ovary; plant taxonomy; rain forests; taxonomic keys; trichomes; Argentina; Caribbean; Cuba; Dominican Republic; Mexico; Peru
Abstract:
... A revision of the American species of the genus Crateva (Capparaceae) recognizes four species: (1) C. palmeri, a CentralAmerican species with short, stubby, pubescent inflorescences distinguished by the furfuraceous trichomes, leaflets sessile or with short petiolules to 4 mm, and short axis of infructescences, 1––6 cm. Unpublished isotypes, local names, and uses of C. palmeri are cited herein; (2 ...
... One of the first observations that plants might utilize cues released by damaged neighbors under natural conditions was made in birch forests in 1985. However, the mechanisms underlying the observations were not determined, and birch (Betula spp.) has been neglected as a study system for inter-plant interaction ever since. Volatiles released by vegetative plant parts in response to herbivore damag ...
... Plant architecture directly affects biomass in higher plants, especially grain yields in agricultural crops. In this study, we characterized a recessive mutant, plant architecture determinant (pad), derived from the Oryza sativa ssp. indica cultivar MH86. The mutant exhibited severe dwarf phenotypes, including shorter and stunted leaves, fewer secondary branches during both the vegetative and repr ...
... The occurrence of Jewel beetle Belionota prasina (Thunberg, 1789) (Coleoptera: Buprestidae) infestation on cashew from Goa, India was reported in this communication. Most of the infested trees were previously attacked by stem borers. Semi-circular D-shaped exit bore holes measuring 7–10 mm in length and 4–7 mm in width were found along the main trunk and branches. Adult beetles were dark greenish ...
... Experimental measurements of cellulose crystallite width and microfibril angle (MFA) by X-ray diffractometry on SilviScan-2 and by conventional microtechniques revealed that the branch wood of the two species exhibited very similar trends in cellulose crystallite width and MFA. Cellulose crystallite width was greater on the upper side of the branches. Tension wood, as defined by the occurrence of ...
Populus deltoides; branches; genetic improvement; genotype; heritability; juvenile wood; tree and stand measurements; tree trunk; yield components; India
Abstract:
... Forty-two genotypes were evaluated for juvenile wood yield and its components at three locations in Bihar, India. A significant difference was observed among the genotypes for all the characters under study. The highest value of genotypic and phenotypic coefficients of variation was observed in juvenile wood volume followed by diameter at breast height (DBH). Characters like plant height, clear bo ...
... Citrus trees with cankers and dieback symptoms were observed in Bushehr (Bushehr province, Iran). Isolations were made from diseased cankers and branches. Recovered fungal isolates were identified using cultural and morphological characteristics, as well as comparisons of DNA sequence data of the nuclear ribosomal DNA-internal transcribed spacer region, translation elongation factor 1α, β-tubulin, ...
branches; canopy; carboxylation; electron transfer; excision; gas exchange; leaves; light intensity; photosynthesis; respiratory rate; trees
Abstract:
... We studied gas exchange of leaves on branches that had been cut and then re-cut under water to assess the utility of measuring gas exchange on leaves of excised canopy branches. There was large variation between species in their ability to photosynthesize following excision. Some species maintained up to 86.5% of intact photosynthetic rate 60 min after excision, whereas other species dropped below ...
branches; roots; transducers (equipment); tree trunk
Abstract:
... An instrument is described which measures radial changes of tree trunks, roots, or branches with an accuracy of about .0002 mm. The basic component consists of an electro—mechanical displacement transducer. Results of preliminary measurements are discussed. ...
... Light Detection and Ranging (Lidar) can generate three-dimensional (3D) point cloud which can be used to characterize horizontal and vertical forest structure, so it has become a popular tool for forest research. Recently, various methods based on top-down scheme have been developed to segment individual tree from lidar data. Some of these methods, such as the one developed by Li et al. (2012), ca ...
Fagus sylvatica; carbon dioxide; gas exchange; photosynthesis; transpiration; water use efficiency; branches; research equipment; bags; polypropylenes; field experimentation
... The removal of ultrafine particles (UFP) by vegetation is now receiving significant attention given their role in cloud physics, human health and respiratory related diseases. Vegetation is known to be a sink for UFP, prompting interest in their collection efficiency. A number of models have tackled the UFP collection efficiency of an isolated leaf or a flat surface; however, up-scaling these theo ...
... Trees in towns and cities provide habitat for wildlife. In particular, cavity-nesting birds nest in the dead and decayed stems and branches of these trees. The same dead and decayed stems and branches also have a greater likelihood of failure, which, in some circumstances, increases risk. We examined 1760 trees in Baltimore, MD, USA and western MA, USA, assessing tree risk and, for a sub-sample, n ...
... A stem canker disease of apple that differs from previously reported canker diseases has been recorded in Xinjiang Uygur Autonomous Region in China. Eight Cytospora strains obtained from diseased apple trees and inoculated onto healthy apple tree branches resulted in the development of the same disease symptoms. This pathogen formed conceptacles, which were multilocular pycnidia with common walls ...
... The effect of irrigation and crop load on alternate bearing was studied in pistachio tree using a “branch carbon budget model” developed to calculate branch carbohydrate balance. Experiences were conducted in Sicily (37°26’N, 14°03’E, 360 m a.s.l.) on female trees of ‘Bianca’. Two treatments were applied: rainfed (T0) and 100 mm of irrigation (T100). At 29, 44, 65, 86, 103 and 121 DAFB, on one ful ...
... Because seed yield is the major factor determining the commercial success of grain crop cultivars, there is a large interest to obtain more understanding of the genetic factors underlying this trait. Despite many studies, mainly in the model plant Arabidopsis thaliana, have reported transgenes and mutants with effects on seed number and/or seed size, knowledge about seed yield parameters remains f ...
Trillium; branches; calyx; carpels; early development; flowering; leaf primordia; rhizomes; scanning electron microscopy; shoot primordia
Abstract:
... Using scanning electron microscopy, we present new morphological and developmental data on rhizomes and aerial flowering shoots of two Japanese Paris species, P. tetraphylla and P. verticillata. Differences in rhizome characters between the species were identified, including 2(-3) annual nodes in P. tetraphylla versus 3-4 in P. verticillata, and thick and elastic rhizomes in the former versus thin ...
branches; entropy; extinction; phylogeny; species diversity; topology; trees
Abstract:
... Traditional measures of biodiversity, such as species richness, usually treat species as being equal. As this is obviously not the case, measuring diversity in terms of features accumulated over evolutionary history provides additional value to theoretical and applied ecology. Several phylogenetic diversity indices exist, but their behaviour has not yet been tested in a comparative framework. We p ...