U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Subject "phloem" Remove constraint Subject: "phloem"
Start Over

Search

3,612  Search Results

« Previous | 1 - 20 of 3,612 |
Number of results to display per page

Search Results

1. Molecular characterization and expression of two enzymes from Dendroctonus armandi, with phloem feeding and juvenile hormone

Author:
Dai, Lulu; Wang, Yuanyuan; Chen, Hui
Source:
Comparative biochemistry and physiology 2021 v.252 pp. 110537
ISSN:
1096-4959
Subject:
phloem,   etc   ; Dendroctonus ponderosae; Pinus; aggregation pheromones; bark beetles; biosynthesis; cytochrome P-450; feeding behavior; females; genes; juvenile hormones; males; oxidoreductases; China;     Show all 14 Subjects
Abstract:
... The Chinese white pine beetle, Dendroctonus armandi Tsai and Li, is a serious native pest in the Qinling Mountains of China. exo-Bevicomin, as the main component of bark beetle pheromone, is released by the female D. armandi. In this paper, we identified two genes encoding, (Z)-6-nonen-2-ol dehydrogenase and CYP6CR, that are known to be involved in xo-brevicomin synthesis to improve the understand ...
DOI:
10.1016/j.cbpb.2020.110537

2. Geomagnetic field absence reduces adult body weight of a migratory insect by disrupting feeding behavior and appetite regulation

Author:
Wan, Gui‐Jun; Jiang, Shou‐Lin; Zhang, Ming; Zhao, Jing‐Yu; Zhang, Ying‐Chao; Pan, Wei‐Dong; Sword, Gregory A.; Chen, Fa‐Jun
Source:
Insect science 2021 v.28 no.1 pp. 251-260
ISSN:
1672-9609
Subject:
phloem,   etc   ; Nilaparvata lugens; adipokinetic hormone; adipokinetic hormone receptors; adults; animals; appetite; body weight; cryptochromes; duration; energy; feeding behavior; females; food choices; genes; glucose; homeostasis; ingestion; insects; instars; magnetic fields; males; migratory behavior; molting; neuropeptides; nymphs;     Show all 26 Subjects
Abstract:
... The geomagnetic field (GMF) is well documented for its essential role as a cue used in animal orientation or navigation. Recent evidence indicates that the absence of GMF (mimicked by the near‐zero magnetic field, NZMF) can trigger stress‐like responses such as reduced body weight, as we have previously shown in the brown planthopper, Nilaparvata lugens. In this study, we found that consistent wit ...
DOI:
10.1111/1744-7917.12765

3. Importers Drive Leaf-to-Leaf Jasmonic Acid Transmission in Wound-Induced Systemic Immunity

Author:
Li, Mengya; Wang, Feifei; Li, Shuangzhang; Yu, Guanghui; Wang, Lijian; Li, Qingqing; Zhu, Xiangyu; Li, Zhen; Yuan, Lixing; Liu, Pei
Source:
Molecular plant 2020 v.13 no.10 pp. 1485-1498
ISSN:
1674-2052
Subject:
phloem,   etc   ; Arabidopsis; immunity; jasmonic acid; leaves; transporters;     Show all 6 Subjects
Abstract:
... The transmission of mobile wound signals along the phloem pathway is essential to the activation of wound-induced systemic response/resistance, which requires an upsurge of jasmonic acid (JA) in the distal undamaged leaves. Among these mobile signals, the electrical signal mediated by the glutamate-dependent activation of several clade three GLUTAMATE RECEPTOR-LIKE (GLR3) proteins is involved in t ...
DOI:
10.1016/j.molp.2020.08.017

4. Phosphatidic acid directly binds with rice potassium channel OsAKT2 to inhibit its activity

Author:
Shen, Like; Tian, Quanxiang; Yang, Lele; Zhang, Hongsheng; Shi, Yiyuan; Shen, Yue; Zhou, Zhenzhen; Wu, Qi; Zhang, Qun; Zhang, Wenhua
Source:
Theplant journal 2020 v.102 no.4 pp. 649-665
ISSN:
0960-7412
Subject:
phloem; phloem loading,   etc   ; Arabidopsis; Oryza sativa; arginine; crop production; crops; electrophysiology; phenotype; phospholipids; plant development; plant growth; plasma membrane; potassium channels; protons; rice; second messengers; seedlings;     Show all 18 Subjects
Abstract:
... The plant Shaker K⁺ channel AtAKT2 has been identified as a weakly rectifying channel that can stabilize membrane potentials to promote photoassimilate phloem loading and translocation. Thus, studies on functional characterization and regulatory mechanisms of AtAKT2‐like channels in crops are highly important for improving crop production. Here, we identified the rice OsAKT2 as the ortholog of Ara ...
DOI:
10.1111/tpj.14731

5. Foliar fertilization: possible routes of iron transport from leaf surface to cell organelles

Author:
Malhotra, Hina; Pandey, Renu; Sharma, Sandeep; Bindraban, Prem S.
Source:
Archiv für Acker- und Pflanzenbau und Bodenkunde 2020 v.66 no.3 pp. 279-300
ISSN:
1476-3567
Subject:
phloem; phloem loading,   etc   ; apoplast; biofortification; chelating agents; crops; foliar application; genes; human health; iron; leaves; organelles; plant nutrition; plasma membrane; plasmodesmata; proteins; roots; shoots; soil;     Show all 19 Subjects
Abstract:
... Iron (Fe) plays a pivotal role in plant nutrition as well as human health. Foliar application is being adopted as an economic, targeted and environment friendly alternative over soil fertilization. However, dependency of foliar fertilization on crop species, environment, Fe compound and Fe status of plant makes it a complex practice. Though a large body of evidence is available on Fe movement from ...
DOI:
10.1080/03650340.2019.1616288

6. Amino Acid Transporters in Plants: Identification and Function

Author:
Yao, Xuehui; Nie, Jing; Bai, Ruoxue; Sui, Xiaolei
Source:
Plants 2020 v.9 no.8
ISSN:
2223-7747
Subject:
phloem loading,   etc   ; amino acid transporters; amino acids; carbon dioxide fixation; growth and development; nitrogen; sustainable agriculture;     Show all 7 Subjects
Abstract:
... Amino acid transporters are the main mediators of nitrogen distribution throughout the plant body, and are essential for sustaining growth and development. In this review, we summarize the current state of knowledge on the identity and biological functions of amino acid transporters in plants, and discuss the regulation of amino acid transporters in response to environmental stimuli. We focus on t ...
DOI:
10.3390/plants9080972

7. Sites of biosynthesis and storage of Taxol in Taxus media (Rehder) plants: Mechanism of accumulation

Author:
Soliman, Sameh S.M.; Raizada, Manish N.
Source:
Phytochemistry 2020 v.175 pp. 112369
ISSN:
0031-9422
Subject:
phloem,   etc   ; Taxus media; bark; biosynthesis; cytotoxicity; enzymes; gene expression; genes; hydrophobicity; neoplasms; organelles; paclitaxel; polyphenols; wood;     Show all 14 Subjects
Abstract:
... Taxol is a cytotoxic agent against various types of cancers. The cytotoxic activities of Taxol can be extended to its synthesizing plant. Here, Taxol is shown to have special synthesis, storage and transport mechanisms that avoid the toxic effects on its source plant. The sites of Taxol biosynthesis, transport and storage were revealed by quantification of plant Taxol, its intermediate baccatin II ...
DOI:
10.1016/j.phytochem.2020.112369

8. Mortierella species from declining Araucaria araucana trees in Patagonia, Argentina

Author:
Vélez, María L.; Marfetán, Jorge A.; Salgado Salomón, María E.; Taccari, Leonardo E.
Source:
Forest pathology 2020 v.50 no.3 pp. e12591
ISSN:
1437-4781
Subject:
phloem,   etc   ; Araucaria araucana; Mortierella alpina; chlorosis; conifers; death; fungi; necrosis; pathogens; pests; trees; Argentina; Chile;     Show all 13 Subjects
Abstract:
... Since 2015, Araucaria araucana, an ecologically and economically important conifer native to Argentina and Chile, has suffered an unusual partial death of the crown throughout almost all of the distribution range in Argentina. No primary pathogen or pest was evident, associated with the phenomenon. Isolates of Mortierella, a poorly studied fungal genus in Patagonia, were obtained from the margins ...
DOI:
10.1111/efp.12591

9. δ15N values in plants are determined by both nitrate assimilation and circulation

Author:
Cui, Jing; Lamade, Emmanuelle; Fourel, François; Tcherkez, Guillaume
Source:
Thenew phytologist 2020 v.226 no.6 pp. 1696-1707
ISSN:
0028-646X
Subject:
phloem,   etc   ; Elaeis guineensis; Helianthus annuus; flooded conditions; fractionation; leaves; metabolites; models; nitrates; nitrogen; potassium; roots; sap;     Show all 13 Subjects
Abstract:
... Nitrogen (N) assimilation is associated with ¹⁴N/¹⁵N fractionation such that plant tissues are generally ¹⁵N‐depleted compared to source nitrate. In addition to nitrate concentration, the δ¹⁵N value in plants is also influenced by isotopic heterogeneity amongst organs and metabolites. However, our current understanding of δ¹⁵N values in nitrate is limited by the relatively small number of compound ...
DOI:
10.1111/nph.16480

10. Positron‐emitting tracer imaging of fluoride transport and distribution in tea plant

Author:
Niu, Hui‐liang; Peng, Chuan‐yi; Zhu, Xu‐dong; Dong, Yang‐yang; Li, Ye‐yun; Tang, Ling‐ling; Wan, Xiao‐chun; Cai, Hui‐mei
Source:
Journal of the science of food and agriculture 2020 v.100 no.8 pp. 3554-3559
ISSN:
0022-5142
Subject:
phloem,   etc   ; Camellia sinensis; absorption; fluorides; image analysis; monitoring; petioles; root systems; roots; tea; xylem;     Show all 11 Subjects
Abstract:
... BACKGROUND: Tea (Camellia sinensis (L.) O. Kuntze) is a hyper‐accumulator of fluoride (F). To understand F uptake and distribution in living plants, we visually evaluated the real‐time transport of F absorbed by roots and leaves using a positron‐emitting (¹⁸F) fluoride tracer and a positron‐emitting tracer imaging system. RESULTS: F arrived at an aerial plant part about 1.5 h after absorption by r ...
DOI:
10.1002/jsfa.10367

11. Vascular Tissue Analysis as a Decisive Tool for Tropical Hardwood Identification: The Case Study of Ekop Species in Cameroon

Author:
Mbarga, Pierre Paul; Mala, Armand William; Mbolo, Marie Marguerite
Source:
International journal of forestry research 2020 v.2020
ISSN:
1687-9376
Subject:
phloem,   etc   ; carrots; case studies; color; dendrology; forests; hardwood; tissue analysis; trade; xylem; Cameroon;     Show all 11 Subjects
Abstract:
... The perforation plates and vessel-ray pitting of tropical hardwoods are typical features that make it possible to mark species within a botanical family. This study aims to bring out a consistent and robust framework for a clear distinction through anatomical features among various Ekop woods based on usual nomenclature on trade. Perforations plates and vessel-ray pitting are determining component ...
DOI:
10.1155/2020/6387369

12. A membrane‐associated NAC domain transcription factor XVP interacts with TDIF co‐receptor and regulates vascular meristem activity

Author:
Yang, Jung Hyun; Lee, Kwang‐Hee; Du, Qian; Yang, Shuo; Yuan, Bingjian; Qi, Liying; Wang, Huanzhong
Source:
Thenew phytologist 2020 v.226 no.1 pp. 59-74
ISSN:
0028-646X
Subject:
phloem,   etc   ; cambium; genes; mutation; peptides; plasma membrane; signal transduction; stem cells; transcription factors; vascular bundles; xylem;     Show all 11 Subjects
Abstract:
... Vascular stem cell maintenance is regulated by a peptide signaling involving Tracheary Element Differentiation Inhibitory Factor (TDIF) and Receptor TDR/PXY (Phloem intercalated with Xylem) and co‐receptor BAK1 (BRI1‐associated receptor kinase1). The regulatory mechanism of this signaling pathway is largely unknown despite its importance in stem cell maintenance in the vascular meristem. We report ...
DOI:
10.1111/nph.16289

13. Effect of radio frequency pretreatment on enzymatic retting of flax stems and resulting fibers properties

Author:
Ruan, Peiying; Raghavan, Vijaya; Du, Jianmin; Gariepy, Yvan; Lyew, Darwin; Yang, Hongyan
Source:
Industrial crops and products 2020 v.146 pp. 112204
ISSN:
0926-6690
Subject:
phloem,   etc   ; enzymes; flax; pectins; presoaking; radio waves; retting; sorption; stems; tensile strength; weight loss;     Show all 11 Subjects
Abstract:
... Radio frequency (RF) pretreatment of different water-presoaking time and RF treatment durations was introduced into enzymatic retting. RF pretreatment was used to degrade non-cellulosic materials and encourage the fast water-absorbing and swelling of the polar components in flax phloem, thus loosen the interfaces between fibers and fiber bundles and facilitate enzymes penetration. Retting efficien ...
DOI:
10.1016/j.indcrop.2020.112204

14. The development of the periderm: the final frontier between a plant and its environment

Author:
Campilho, Ana; Nieminen, Kaisa; Ragni, Laura
Source:
Current opinion in plant biology 2020 v.53 pp. 10-14
ISSN:
1369-5266
Subject:
phloem,   etc   ; abiotic stress; biotic stress; cambium; periderm; plant organs; suberization; transcription factors; wood;     Show all 9 Subjects
Abstract:
... The periderm acts as the first line of defence for a plant, protecting wood and phloem from abiotic and biotic stresses. During secondary growth, through the increase in girth of plant organs, the periderm replaces the epidermis as the outermost tissue. The phellogen, a bifacial post-embryonic meristem, forms the phelloderm inwards (toward the vasculature) and the suberized phellem outwards (towar ...
DOI:
10.1016/j.pbi.2019.08.008

15. Application of capillary electrophoretic methods for the analysis of plant phloem and xylem saps composition: A review

Author:
Melicherová, Natália; Řemínek, Roman; Foret, František
Source:
Journal of separation science 2020 v.43 no.1 pp. 271-284
ISSN:
1615-9306
Subject:
phloem,   etc   ; abiotic stress; biotic stress; capillary electrophoresis; nutrients; nutritional status; plant physiology; sap; xylem;     Show all 9 Subjects
Abstract:
... Plant vascular tissue is essential for the exchange of water, nutrients, metabolic products, and signals among distant organs in cormophytes. The compositions of phloem and xylem saps are highly dependent on many internal and external factors, and thus their analysis provides a valuable insight into plant physiology, growth, and development as well as nutrition status or presence of biotic or abio ...
DOI:
10.1002/jssc.201900844

16. Effect of dormancy on the development of phloem fiber clusters

Author:
Baba, Kei’ichi; Kurita, Yuko; Mimura, Tetsuro
Source:
Journal of wood science 2019 v.65 no.1 pp. 40
ISSN:
1435-0211
Subject:
phloem,   etc   ; Populus; cambium; dormancy; models; trees;     Show all 6 Subjects
Abstract:
... The development of phloem fibers was investigated in poplars grown under artificially fixed conditions and under an artificially shortened annual cycle system that includes a dormancy phase. The phloem tissues in these trees formed two- or three-layer fiber clusters; however, clusters in trees that underwent periodic dormancy were larger than those in trees that did not. Individual fibers were als ...
DOI:
10.1186/s10086-019-1819-z

17. Stem anatomy of Turbinicarpus s.l. (Cacteae, Cactaceae) and its contribution to systematics

Author:
De la Rosa-Tilapa, Alejandro; Vázquez-Sánchez, Monserrat; Terrazas, Teresa
Source:
Plant biosystems 2019 v.153 no.4 pp. 600-609
ISSN:
1724-5575
Subject:
phloem,   etc   ; Turbinicarpus; crystals; monophyly; periderm; sclerenchyma; wood;     Show all 7 Subjects
Abstract:
... The stem anatomy of Turbinicarpus s.l. was studied with the aims of finding characters to support the three clades (Rapicactus, Kadenicarpus, and Turbinicarpus) in which Turbinicarpus s.l. was recovered in the most recent phylogeny of the Cacteae tribe. Thirty-five taxa were prepared, and their tissues were compared. Substantial variation was found in the epidermal surface. The hypodermis has conc ...
DOI:
10.1080/11263504.2018.1527791

18. Leaf anatomical features of the Eriosema campestre Benth. (Leguminosae, Papilionoideae, Phaseoleae) complex and potential taxonomic implications

Author:
Pacheco Seixas, Diana; Fortuna-Perez, Ana Paula; Rodrigues, Tatiane Maria
Source:
Flora 2019 v.253 pp. 107-115
ISSN:
0367-2530
Subject:
phloem,   etc   ; Eriosema; herbaria; morphs; petioles; trichomes;     Show all 6 Subjects
Abstract:
... Identification of taxa of the Eriosema campestre Benth. (Leguminosae, Papilionoideae, Phaseoleae) complex has proven difficult due to their morphological uniformity. Eriosema campestre is currently considered to comprise three varieties (E. campestre var. campestre, E. campestre var. delicatula Fortunato and E. campestre var. macrophyllum (Grear) Fortunato), which are mainly distinguished by chara ...
DOI:
10.1016/j.flora.2019.03.011

19. Drought impacts on phloem transport

Author:
Sevanto, Sanna
Source:
Current opinion in plant biology 2018 v.43 pp. 76-81
ISSN:
1369-5266
Subject:
phloem,   etc   ; drought; prediction; xylem;     Show all 4 Subjects
Abstract:
... Drought impacts on phloem transport have attracted attention only recently, despite the well-established, and empirically verified theories on drought impacts on water transport in plants in general. This is because studying phloem transport is challenging. Phloem tissue is relatively small and delicate, and it has often been assumed not to be impacted by drought, or having insignificant impact on ...
DOI:
10.1016/j.pbi.2018.01.002

20. Manipulation of sucrose phloem and embryo loading affects pea leaf metabolism, carbon and nitrogen partitioning to sinks as well as seed storage pools

Author:
Lu, Ming‐Zhu; Snyder, Rachel; Grant, Jan; Tegeder, Mechthild
Source:
Theplant journal 2020 v.101 no.1 pp. 217-236
ISSN:
0960-7412
Subject:
phloem; phloem loading,   etc   ; Pisum sativum; amino acids; carbon; cotyledons; humans; leaves; nitrogen; nitrogen metabolism; nutritive value; peas; photosynthesis; protein content; seed development; seed storage; seed yield; starch; sucrose; transgenic plants; transporters; vegetables;     Show all 22 Subjects
Abstract:
... Seed development largely depends on the long‐distance transport of sucrose from photosynthetically active source leaves to seed sinks. This source‐to‐sink carbon allocation occurs in the phloem and requires the loading of sucrose into the leaf phloem and, at the sink end, its import into the growing embryo. Both tasks are achieved through the function of SUT sucrose transporters. In this study, we ...
DOI:
10.1111/tpj.14533