Maize lateral root developmental plasticity induced by mild water stress. II : Genotype‐specific spatio‐temporal effects on determinate development

2020 ◽  
Vol 43 (10) ◽  
pp. 2409-2427
Author(s):  
Tyler G. Dowd ◽  
David M. Braun ◽  
Robert E. Sharp
Keyword(s):  
Water Stress ◽  
Lateral Root ◽  
Developmental Plasticity ◽  
Temporal Effects ◽  
Spatio Temporal ◽  
Mild Water Stress

scholarly journals Photosynthetic parameters and growth in seedlings of Bertholletia excelsa and Carapa guianensis in response to pre-acclimation to full sunlight and mild water stress

2014 ◽  
Vol 44 (1) ◽  
pp. 67-77 ◽  
Author(s):  
Gracilene Fernandes da Costa Azevedo
Keyword(s):  
Water Stress ◽  
Higher Plants ◽  
Field Capacity ◽  
Outdoor Exposure ◽  
Photosynthetic Parameters ◽  
Bertholletia Excelsa ◽  
Full Sunlight ◽  
Carapa Guianensis ◽  
Light Levels ◽  
Mild Water Stress

Light and water are important factors that may limit the growth and development of higher plants. The aim of this study was to evaluate photosynthetic parameters and growth in seedlings of Bertholletia excelsa and Carapa guianensis in response to pre-acclimation to full sunlight and mild water stress. I used six independent pre-acclimation treatments (0, 90 (11h15-12h45), 180 (10h30-13h30), 360 (09h00-15h00), 540 (07h30-16h30) and 720 min (06h00-18h00)) varying the time of exposure to full sunlight (PFS) during 30 days, followed by whole-day outdoor exposure for 120 days. Before PFS, the plants were kept in a greenhouse at low light levels (0.8 mol m-2 day-1). The PFS of 0 min corresponded to plants constantly kept under greenhouse conditions. From the beginning to the end of the experiment, each PFS treatment was submitted to two water regimes: moderate water stress (MWS, pre-dawn leaf water potential (ΨL) of -500 to -700 kPa) and without water stress (WWS, ΨL of -300 kPa, soil kept at field capacity). Plants under MWS received only a fraction of the amount of water applied to the well-watered ones. At the end of the 120-day-period under outdoor conditions, I evaluated light saturated photosynthesis (Amax), stomatal conductance (g s), transpiration (E) and plant growth. Both Amax and g s were higher for all plants under the PFS treatment. Stem diameter growth rate and Amax were higher for C. guianensis subjected to MWS than in well-watered plants. The contrary was true for B. excelsa. The growth of seedlings was enhanced by exposure to full sunlight for 180 minutes in both species. However, plants of B. excelsa were sensitive to moderate water stress. The higher photosynthetic rates and faster growth of C. guianensis under full sun and moderate water stress make this species a promissory candidate to be tested in reforestation programs.

scholarly journals Morphological Features and Biomass Partitioning of Lucerne Plants (Medicago sativa L.) Subjected to Water Stress

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 322
Author(s):  
Yong-Zhong Luo ◽  
Guang Li ◽  
Guijun Yan ◽  
Hui Liu ◽  
Neil C. Turner
Keyword(s):  
Water Stress ◽  
Water Supply ◽  
Lateral Root ◽  
Dry Weight ◽  
Agricultural Systems ◽  
Root Dry Weight ◽  
Severe Water Stress ◽  
Medicago Sativa L ◽  
Leaf Dry Weight ◽  
Semi Arid

Drought is one of the major abiotic stresses affecting the morphological, physiological, and metabolic processes of plants, and hence their growth and production on a global scale. Lucerne (Medicago sativa L.) is one of the most popular pasture species in semi-arid regions and plays a critical role in sustaining agricultural systems in many areas of the world. In order to evaluate the effect of water deficits on the growth and biomass distribution in different tissues of lucerne, plant height, leaf dry weight, leaf number and area, root dry weight, taproot length and lateral root number, and stem dry weight were measured at four stages from the seedling to flowering stages under three water regimes: (i) adequate water supply (minimum soil water content 85% pot capacity (PC)), (ii) moderate water stress (65% PC), and (iii) severe water stress (45% PC), imposed under a rainout shelter. With limited water supply, plant height, leaf number, leaf area and dry weight, taproot length, and total biomass were reduced, while lateral root numbers increased. The number of smaller leaves and root dry weight increased under moderate water stress, whereas severe water stress reduced them. Leaf, stem, and total dry weight were all reduced by the water deficits, but leaf dry weight was reduced the most and root dry weight the least, so there was a redistribution of biomass towards the roots, increasing the root–shoot ratio. These results help us to understand the response of lucerce to water stress and assist in developing a foundation for the sustainable use of lucerne in semi-arid agricultural systems.

Spatio-temporal effects of acute alcohol intoxication on endocannabinoid system in rat brain and blood

Alcohol ◽  
2020 ◽  
Vol 88 ◽  
pp. 101-108
Author(s):  
Xiaoru Dong ◽  
Dingang Zhang ◽  
Rongzhe Zhu ◽  
Xiaochen Liu ◽  
Yonghong Ye ◽  
...  
Keyword(s):  
Rat Brain ◽  
Alcohol Intoxication ◽  
Endocannabinoid System ◽  
Acute Alcohol Intoxication ◽  
Temporal Effects ◽  
Spatio Temporal

Influence of elevated CO2 and mild water stress on nonstructural carbohydrates in field-grown cotton tissues

1994 ◽  
Vol 70 (1-4) ◽  
pp. 153-162 ◽  
Author(s):  
D.L. Hendrix ◽  
J.R. Mauney ◽  
B.A. Kimball ◽  
K. Lewin ◽  
J. Nagy ◽  
...  
Keyword(s):  
Water Stress ◽  
Elevated Co2 ◽  
Nonstructural Carbohydrates ◽  
Mild Water Stress

Spatio-temporal effects of low impact development practices

2009 ◽  
Vol 367 (3-4) ◽  
pp. 228-236 ◽  
Author(s):  
Kristin L. Gilroy ◽  
Richard H. McCuen
Keyword(s):  
Low Impact Development ◽  
Temporal Effects ◽  
Spatio Temporal

Spatio-temporal effects in optical self-focusing

2001 ◽  
Author(s):  
Y. Silberberg ◽  
H.S. Eisenberg ◽  
R. Morandotti ◽  
S. Bar-Ad ◽  
J.S. Aitchison
Keyword(s):  
Temporal Effects ◽  
Self Focusing ◽  
Spatio Temporal

Contribution of mineral nutrition to the response of barley seedlings to polyethylene glycol–induced mild water stress

2007 ◽  
Vol 170 (3) ◽  
pp. 392-397 ◽  
Author(s):  
Konstantina V. Kocheva ◽  
Georgi I. Georgiev ◽  
Reneta V. Vunkova-Radeva
Keyword(s):  
Polyethylene Glycol ◽  
Water Stress ◽  
Mineral Nutrition ◽  
Mild Water Stress
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