U.S. flag

An official website of the United States government

PubAg

Main content area

Search

706  Search Results

« Previous | 1 - 20 of 706 |
Number of results to display per page

Search Results

1. Self-plant perception via long-distance signaling

Author:
Muñoz-Parra, Edith; Salmerón Barrera, Guadalupe; Ruiz-Herrera, León Francisco; Valencia-Cantero, Eduardo; López-Bucio, José
Source:
Plant signaling & behavior 2017 v.12 no.12 pp. e1404218
ISSN:
1559-2324
Subject:
lateral roots; root growth; root tips,   etc   ; Arabidopsis thaliana; auxins; bacteria; fungi; herbivores; phase transition; plant density; plant development; seedlings;     Show all 12 Subjects
Abstract:
... Plant growth and development are influenced by the interactions with other organisms including bacteria, fungi, herbivores and neighboring plants. Plant density influences the phase transitions during the entire life cycle and root architecture through a mechanism involving auxin and MEDIATOR 25 in Arabidopsis thaliana, but the nature of the signals that are perceived in response to increasing num ...
DOI:
10.1080/15592324.2017.1404218
PubMed:
29125418
PubMed Central:
PMC5792132

2. A RootNav analysis of morphological changes in Brassica napus L. roots in response to different nitrogen forms

Author:
Guo, Qianqian; Love, Jonathan; Roche, Jessica; Song, Jiancheng; Turnbull, Matthew H.; Jameson, Paula E.
Source:
Plant growth regulation 2017 v.83 no.1 pp. 83-92
ISSN:
0167-6903
Subject:
root growth; root systems; roots,   etc   ; Brassica napus; ammonium; biomass; branching; glutamic acid; nitrates; nitrogen; nitrogen content; nutrients; seedlings;     Show all 13 Subjects
Abstract:
... Root architecture impacts the capacity of plants to access nutrients and water. By using the RootNav package, comprehensive morphological changes in root system architecture in response to different nitrogen concentrations and sources were investigated in Brassica napus. Ten-day-old seedlings showed a decrease in total root length, lateral root (LR) density and root exploration area with increasin ...
DOI:
10.1007/s10725-017-0285-0

3. Influence of nitrogen fertilisation on biometric features of two-year-old seedlings of pedunculate oak subjected for root pruning

Author:
Hauke-Kowalska, Maria; Kasprzyk, Winicjusz
Source:
Folia forestalia Polonica 2017 v.59 no.4 pp. 281-286
ISSN:
2199-5907
Subject:
root crown; root pruning; root systems,   etc   ; Quercus robur; ammonium nitrate; biometry; fertilizer application; growing season; hardwood; nitrogen; nitrogen fertilizers; roots; second growth; seedlings; urea;     Show all 15 Subjects
Abstract:
... Pruning is one of the important cultural treatments that have potential to influence hardwood seedling morphology. The aim of the study was to compare the growth of pedunculate oak seedlings, performed pruning roots, in the second growing season, fertilised full and reduced dose of nitrogen. A total of 24 experimental plots, each with an the area of 0.04 ha, were designated. The roots pruning were ...
DOI:
10.1515/ffp-2017-0030

4. TNO1, a TGN-localized SNARE-interacting protein, modulates root skewing in Arabidopsis thaliana

Author:
Roy, Rahul; Bassham, Diane C.
Source:
BMC plant biology 2017 v.17 no.1 pp. 73
ISSN:
1471-2229
Subject:
root growth; roots,   etc   ; Arabidopsis thaliana; culture media; genes; hypocotyls; knockout mutants; microtubules; phenotype; seedlings; soil;     Show all 11 Subjects
Abstract:
... BACKGROUND: The movement of plant roots within the soil is key to their ability to interact with the environment and maximize anchorage and nutrient acquisition. Directional growth of roots occurs by a combination of sensing external cues, hormonal signaling and cytoskeletal changes in the root cells. Roots growing on slanted, impenetrable growth medium display a characteristic waving and skewing, ...
DOI:
10.1186/s12870-017-1024-4
PubMed:
28399805
PubMed Central:
PMC5387210

5. Differential auxin transport and accumulation in the stem base lead to profuse adventitious root primordia formation in the aerial roots (aer) mutant of tomato (Solanum lycopersicum L.)

Author:
Mignolli, F.; Mariotti, L.; Picciarelli, P.; Vidoz, M.L.
Source:
Journal of plant physiology 2017 v.213 pp. 55-65
ISSN:
0176-1617
Subject:
adventitious roots; root primordia,   etc   ; Solanum lycopersicum; genes; hypocotyls; indole acetic acid; mutants; phenotype; seedlings; stems; tomatoes;     Show all 11 Subjects
Abstract:
... The aerial roots (aer) mutant of tomato is characterized by a profuse and precocious formation of adventitious root primordia along the stem. We demonstrated that auxin is involved in the aer phenotype but ruled out higher auxin sensitivity of mutant plants. Interestingly, polar auxin transport was altered in aer, as young seedlings showed a reduced response to an auxin transport inhibitor and hig ...
DOI:
10.1016/j.jplph.2017.02.010

6. The interaction between glucose and cytokinin signaling in controlling Arabidopsis thaliana seedling root growth and development

Author:
Kushwah, Sunita; Laxmi, Ashverya
Source:
Plant signaling & behavior 2017 v.12 no.5 pp. e1312241
ISSN:
1559-2324
Subject:
root growth; root hairs,   etc   ; Arabidopsis thaliana; auxins; cytokinins; genes; glucose; histidine; mutants; seedlings; signal transduction;     Show all 11 Subjects
Abstract:
... Cytokinin (CK) and glucose (GLC) control several common responses in plants. There is an extensive overlap between CK and GLC signal transduction pathways in Arabidopsis. Physiologically, both GLC and CK could regulate root length in light. CK interacts with GLC via HXK1 dependent pathway for root length control. Wild-type (WT) roots cannot elongate in the GLC free medium while CK-receptor mutant ...
DOI:
10.1080/15592324.2017.1312241
PubMed:
28467152
PubMed Central:
PMC5501229

7. Influence of substrate and burial on the development of Posidonia oceanica: implications for restoration

Author:
Guerrero‐Meseguer, Laura; Sanz‐Lázaro, Carlos; Suk‐ueng, Krittawit; Marín, Arnaldo
Source:
Restoration ecology 2017 v.25 no.3 pp. 453-458
ISSN:
1061-2971
Subject:
root systems; roots,   etc   ; Posidonia oceanica; buried seeds; glass; leaf development; leaves; sand; seagrasses; seedlings;     Show all 10 Subjects
Abstract:
... Posidonia oceanica is one of the few seagrasses that can colonize hard and soft substrates. To test whether substrate could affect root development of the seedlings, with a legacy effect upon transplantation to sand, we germinated seeds on hard (glass slide) versus soft (sand) substrates in microcosms. We found that sand favored root system development, with a compensatory slowing of leaf developm ...
DOI:
10.1111/rec.12438

8. Submergence, seed germination, and seedling development of the Amazonian floodplain tree Pseudobombax munguba: evidence for root oxytropism

Author:
Ferreira, Cristiane Silva; Piedade, Maria Teresa Fernandez; Franco, Augusto Cesar
Source:
Trees 2017 v.31 no.2 pp. 705-716
ISSN:
0931-1890
Subject:
root cap; root growth,   etc   ; Malvaceae; amyloplasts; floodplains; forests; gravitropism; oxygen; seed germination; seedlings; seeds; submergence; trees;     Show all 13 Subjects
Abstract:
... KEY MESSAGE: Primary root of seeds germinating while submerged grew upwards towards oxygen-rich surface layers. Height of water column influenced germination and root growth. Seedlings removed from water attached to substrate and grow vertically. Oxygen and light are potentially limiting resources in floodplain forests where plants are subjected to long periods of flooding, particularly in early s ...
DOI:
10.1007/s00468-016-1501-7

9. Early root growth and architecture of fast- and slow-growing Norway spruce (Picea abies) families differ—potential for functional adaptation

Author:
Hamberg, Leena; Velmala, Sannakajsa M; Sievänen, Risto; Kalliokoski, Tuomo; Pennanen, Taina
Source:
Tree physiology 2017 v.38 no.6 pp. 853-864
ISSN:
1758-4469
Subject:
fine roots; root growth; root tips,   etc   ; Picea abies; aerial parts; biomass; boreal forests; branches; forest soils; image analysis; nutrients; phenotype; seedlings; tree physiology; trees;     Show all 15 Subjects
Abstract:
... The relationship between the growth rate of aboveground parts of trees and fine root development is largely unknown. We investigated the early root development of fast- and slow-growing Norway spruce (Picea abies (L.) H. Karst.) families at a developmental stage when the difference in size is not yet observed. Seedling root architecture data, describing root branching, were collected with the WinR ...
DOI:
10.1093/treephys/tpx159

10. Phenotyping Root System Architecture of Cotton (Gossypium barbadense L.) Grown Under Salinity

Author:
Mottaleb, Shady A.; Darwish, Essam; Mostafa, Menna; Safwat, Gehan
Source:
Agriculture = Pol̕nohospodárstvo 2017 v.63 no.4 pp. 142-150
ISSN:
1338-4376
Subject:
root growth; root systems; roots,   etc   ; Gossypium barbadense; Sphagnum; agricultural economics; biomass; cotton; cultivars; genotype; ions; leaves; phenotype; potassium; proline; salinity; salt tolerance; sand; seedlings; shoots; sodium; soil salinity;     Show all 22 Subjects
Abstract:
... Soil salinity causes an annual deep negative impact to the global agricultural economy. In this study, the effects of salinity on early seedling physiology of two Egyptian cotton (Gossypium barbadense L.) cultivars differing in their salinity tolerance were examined. Also the potential use of a low cost mini-rhizotron system to measure variation in root system architecture (RSA) traits existing in ...
DOI:
10.1515/agri-2017-0014

11. The carbon bonus of organic nitrogen enhances nitrogen use efficiency of plants

Author:
Franklin, Oskar; Cambui, Camila Aguetoni; Gruffman, Linda; Palmroth, Sari; Oren, Ram; Näsholm, Torgny
Source:
Plant, cell and environment 2017 v.40 no.1 pp. 25-35
ISSN:
0140-7791
Subject:
root growth; root shoot ratio; roots,   etc   ; Arabidopsis; Picea; amino acids; carbon; crop production; growth models; laboratory experimentation; nitrates; nitrogen; nutrient use efficiency; plant nutrition; proteins; seedlings; shoots; soil;     Show all 18 Subjects
Abstract:
... The importance of organic nitrogen (N) for plant nutrition and productivity is increasingly being recognized. Here we show that it is not only the availability in the soil that matters, but also the effects on plant growth. The chemical form of N taken up, whether inorganic (such as nitrate) or organic (such as amino acids), may significantly influence plant shoot and root growth, and nitrogen use ...
DOI:
10.1111/pce.12772
PubMed:
27241731
PubMed Central:
PMC5217072

12. Low phosphorus and competition affect Chinese fir cutting growth and root organic acid content: does neighboring root activity aggravate P nutrient deficiency?

Author:
Wu, Pengfei; Wang, Guangyu; Farooq, Taimoor Hassan; Li, Qi; Zou, Xianhua; Ma, Xiangqing
Source:
Journal of soils and sediments 2017 v.17 no.12 pp. 2775-2785
ISSN:
1439-0108
Subject:
root crown; root growth; root shoot ratio,   etc   ; Cunninghamia lanceolata; biomass production; citric acid; decanoic acid; dry matter accumulation; greenhouse experimentation; intraspecific competition; nutrient deficiencies; phosphorus; plantations; potassium dihydrogen phosphate; root tips; seedlings; shoots; tissues; tree growth;     Show all 19 Subjects
Abstract:
... PURPOSE: In order to manage Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) plantations over the long term, it is critical to understand the species’ response to intraspecific competition at sites with low phosphorus (P). The objective of the present study was to investigate the effects of neighbor competition on the growth of Chinese fir under low P conditions, as well as on the morphology an ...
DOI:
10.1007/s11368-017-1852-8

13. Phosphorus effects on radial oxygen loss, root porosity and iron plaque in two mangrove seedlings under cadmium stress

Author:
Dai, Minyue; Liu, Jingchun; Liu, Wenwen; Lu, Haoliang; Jia, Hui; Hong, Hualong; Yan, Chongling
Source:
Marine pollution bulletin 2017 v.119 no.1 pp. 262-269
ISSN:
0025-326X
Subject:
roots,   etc   ; biomass; cadmium; hydroponics; iron; oxygen; phosphorus; porosity; seedlings; toxicity;     Show all 10 Subjects
Abstract:
... Phosphorus is an indispensable element for plants, but its role in alleviating the cadmium toxicity of mangrove seedlings is poorly documented. In this study, mangrove seedlings were grown in hydroponics and exposed to various Cd and P treatments. Data suggested that the inhibitory effect of Cd on the rate of radial oxygen loss and root porosity was alleviated by P. A. marina had a higher rate of ...
DOI:
10.1016/j.marpolbul.2017.04.013

14. Cadmium Uptake by Cuttings of Impatiens walleriana in Response to Different Cadmium Concentrations and Growth Periods

Author:
Lai, Hung-Yu; Lam, Chun-Ming; Wang, Wei-Zhe; Ji, Ya-Jhu
Source:
Bulletin of environmental contamination and toxicology 2017 v.98 no.3 pp. 317-322
ISSN:
0007-4861
Subject:
roots,   etc   ; Impatiens walleriana; cadmium; exhibitions; hydroponics; hyperaccumulators; seedlings;     Show all 7 Subjects
Abstract:
... Impatiens walleriana (I. walleriana), a potential cadmium (Cd) hyperaccumulator, can propagate by cuttings, which are less expensive to grow than seedlings. Different growth periods for cuttings, however, may lead to different physiological characteristics. In this study, I. walleriana cuttings were hydroponically grown in Cd-containing solutions (1.0–10.0 μM) for various growth periods (10–60 day ...
DOI:
10.1007/s00128-016-1874-8

15. A soil-less system for culturing rice root-knot nematode, Meloidogyne graminicola

Author:
Kumar, Puneet; Kumar, Vinod; Mohan, Sharad; Walia, Raman Kumar
ISSN:
1388-5545
Subject:
root galls; root systems; root-knot nematodes,   etc   ; Meloidogyne graminicola; Oryza sativa; climatic factors; edaphic factors; eggs; germination; greenhouses; juveniles; nutrient solutions; rice; roots; seedlings; seeds; shoots; sodium hypochlorite; soil; submergence; tap water; temperature; trays; India;     Show all 24 Subjects
Abstract:
... The rice root-knot nematode, Meloidogyne graminicola Golden & Birchfield, 1965, is a serious pest of rice throughout the world. Rice nurseries in particular are severely damaged under varied climatic conditions in India (Anonymous, 2016). Meloidogyne graminicola is reported to cause 17-30% yield loss due to poorly filled kernels (MacGowan & Langdon, 1989). Maintaining cultures of M. graminicola in ...
DOI:
10.1163/15685411-00003076

16. Accelerating root system phenotyping of seedlings through a computer-assisted processing pipeline

Author:
Dupuy, Lionel X.; Wright, Gladys; Thompson, Jacqueline A.; Taylor, Anna; Dekeyser, Sebastien; White, Christopher P.; Thomas, William T. B.; Nightingale, Mark; Hammond, John P.; Graham, Neil S.; Thomas, Catherine L.; Broadley, Martin R.; White, Philip J.
Source:
Plant methods 2017 v.13 no.1 pp. 57
ISSN:
1746-4811
Subject:
root systems; roots,   etc   ; algorithms; automation; breeding; computer software; cost effectiveness; databases; equipment; genetic analysis; genotype; phenotype; screening; seedlings;     Show all 14 Subjects
Abstract:
... BACKGROUND: There are numerous systems and techniques to measure the growth of plant roots. However, phenotyping large numbers of plant roots for breeding and genetic analyses remains challenging. One major difficulty is to achieve high throughput and resolution at a reasonable cost per plant sample. Here we describe a cost-effective root phenotyping pipeline, on which we perform time and accuracy ...
DOI:
10.1186/s13007-017-0207-1
PubMed:
28717384
PubMed Central:
PMC5508676

17. Glasshouse studies of inherent root growth of seedling avocado rootstock cultivars

Author:
Neilsen, M. J.; Drenth, A.; Dann, E. K.; Campbell, P. R.
Source:
Acta horticulturae 2017 no.1178 pp. 35-40
ISSN:
0567-7572
Subject:
root growth; roots,   etc   ; Persea americana; Phytophthora cinnamomi; avocados; cultivars; greenhouse experimentation; harvesting; leaves; photosynthesis; races; rootstocks; seedlings;     Show all 13 Subjects
Abstract:
... In order to mimic loss of root function caused by Phytophthora cinnamomi, differences in inherent root growth of avocado seedlings of ten different rootstock cultivars across the three ecological races were investigated. A 2-pot root harvesting system was used and roots were harvested at three different intervals to assess tolerance to root removal. Seedling 'Velvick' produced the largest amount o ...
DOI:
10.17660/ActaHortic.2017.1178.6

18. Detection of nickel in maize roots: A novel nondestructive approach by reflectance spectroscopy and colorimetric models

Author:
Fedenko, Volodymyr S.; Landi, Marco; Shemet, Sergiy A.
Source:
Ecological indicators 2017 v.82 pp. 463-469
ISSN:
1470-160X
Subject:
root growth; roots,   etc   ; Zea mays; color; colorimetry; corn; growth retardation; models; nickel; optical properties; phytotoxicity; reflectance spectroscopy; seedlings; wavelengths;     Show all 14 Subjects
Abstract:
... In this paper, a novel method capable of assessing nickel (Ni) uptake in intact plant roots is proposed and validated. Dimethylglyoxime (DMG) was used to stain roots of seven-day-old maize (Zea mays L.) seedlings grown in solutions containing 0, 0.025, 0.1, 0.2, and 0.5mM Ni2+. A nondestructive approach by using reflectance spectroscopy and CIE XYZ and CIE L*a*b* color systems was used to investig ...
DOI:
10.1016/j.ecolind.2017.07.021

19. Nonlinear biotic ligand model for assessing alleviation effects of Ca, Mg, and K on Cd toxicity to soybean roots

Author:
Chen, Bo-Ching; Wang, Pin-Jie; Ho, Pei-Chi; Juang, Kai-Wei
Source:
Ecotoxicology 2017 v.26 no.7 pp. 942-955
ISSN:
0963-9292
Subject:
root growth; roots,   etc   ; cadmium; calcium; cations; heavy metals; hydroponics; ligands; magnesium; models; monitoring; potassium; prediction; seedlings; soybeans; toxicity;     Show all 16 Subjects
Abstract:
... Developing a nonlinear biotic ligand model (BLM) that considers the geometrical constraints for binding of different cations on biotic ligands will provide more reliable details about the hypothetical mechanism governing the alleviation of cadmium (Cd) toxicity by coexistent cations. Soybean seedlings under Cd stress produced by various activities of coexistent cations such as calcium (Ca²⁺), magn ...
DOI:
10.1007/s10646-017-1823-2

20. Effect of different nitrogen forms on the toxicity of Zn in wheat seedling root: a modeling analysis

Author:
Wang, Yi-Min; Wang, Peng; Hao, Xiu-Zhen; Zhou, Dong-Mei; Li, Ji-Zhou
Source:
Environmental science and pollution research international 2017 v.24 no.23 pp. 18896-18906
ISSN:
0944-1344
Subject:
root growth; roots,   etc   ; ammonium; bioavailability; calcium; cell membranes; culture media; heavy metals; models; nitrates; nitrogen; seedlings; toxicity; wheat; zinc;     Show all 15 Subjects
Abstract:
... Heavy metal stress in culture media is always rhizotoxic. Our study aims to investigate the role of negative potential (ψ ₀) at root cell membrane surface (CMs) on modeling Zn²⁺ toxicity to wheat seedling roots and to examine the effects of different nitrogen forms (NH₄ ⁺ and NO₃ ⁻) on ψ ₀ and Zn rhizotoxicity. Solution culture experiments were conducted to measure the root elongation and Zn accum ...
DOI:
10.1007/s11356-017-9495-2