Water Deficits and Plant Growth. Volume IV: Soil Water Measurement, Plant Responses, and Breeding for Drought Resistance. T. T. Kozlowski

1977 ◽  
Vol 52 (4) ◽  
pp. 426-427
Author(s):  
Jerry D. Eastin
Keyword(s):  
Plant Growth ◽  
Soil Water ◽  
Drought Resistance ◽  
Plant Responses ◽  
Water Deficits ◽  
Water Measurement

Wheat regenerants in the system of rapid assessment of the effect of 24-epibrassinolide

Biomics ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 394-397
Author(s):  
Seldimirova O.A. ◽  
M.V. Bezrukova ◽  
N.N. Кruglova ◽  
F.М. Shakirova
Keyword(s):  
Plant Growth ◽  
Experimental Model ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Drought Resistance ◽  
Rapid Assessment ◽  
Immature Embryo ◽  
Model System ◽  
Wheat Cultivars ◽  
Experimental Model System

The influence of 24-epibrassinolide on the efficiency of regenerants obtained from embryonic calli formation was studied in wheat cultivars contrast for drought resistance. The possibility of using the experimental model system «immature embryo – embryonic callus – regenerant» in the rapid assessment of the effect of antistress plant growth regulators is shown.

Plastic Mulch Color Effects on Light Micro-environment and Watermelon Plant Growth

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 474d-474
Author(s):  
N.K. Damayanthi Ranwala ◽  
Dennis R. Decoteau
Keyword(s):  
Plant Growth ◽  
Light Transmission ◽  
Root Zone ◽  
Dry Mass ◽  
Plant Responses ◽  
Plastic Mulch ◽  
Plant Parts ◽  
Reflected Light ◽  
Total Light ◽  
Dry Mass Partitioning

This study was conducted to evaluate the spectral properties of various colored plastic color mulches and to determine the effects of upwardly reflected light from the mulch surfaces on watermelon plant growth when differences in root zone temperatures are minimized. Two-week-old watermelon plants were grown with black mulch, red-painted mulch, SRM-Red mulch (Sonoco, Inc., Harstville, S.C.), and white mulch. Total light reflection (58 μmol·m–2·s–1 in 400–700 nm) and red: far-red (R:FR = 0.44) of reflected light were lower in black mulch and highest in white mulch (634 and 0.92, respectively). Both black mulch and white mulch had same blue:red (B:R = 0.6) while white mulch had higher B:FR (0.58) in reflected light compared to black mulch (0.26). Reflective properties of red mulches were somewhat similar, and R:FR, B:R, and B:FR were 0.8, 0.2, and 0.18, respectively. However, SRM-Red mulch had highest total light (355 μmol·m–2·s–1 in 400–700 nm) transmission through the mulch, and R:FR, B:R, and B:FR were 0.84, 0.28, and 0.23, respectively. Light transmission through the other mulches was nonsignificant. Watermelon plants grown with black mulch and red mulches had higher internode lengths compared to white mulch after 20 days. Further, plants grown under black had significant higher petiole elongation accompanied with higher dry mass partitioning to petioles, and lower partitioning to roots, stems, and leaves. There was no effects of surface mulch color on total plant dry mass or photosynthesis although plants with black had higher transpiration rate. This suggests the differential regulation of dry mass partitioning among plant parts due to mulch color. The similar plant responses with black mulch and white mulch to plants treated with FR or R light at the end of photoperiod implies the involvement of phytochrome regulation of growth due to mulch surface color.

Low temperature acclimation and legacy effects of summer water deficits in olive freezing resistance

2021 ◽  
Author(s):  
Nadia S Arias ◽  
Fabián G Scholz ◽  
Guillermo Goldstein ◽  
Sandra J Bucci
Keyword(s):  
Plant Growth ◽  
Water Deficit ◽  
Low Temperatures ◽  
Cell Damage ◽  
Leaf Water ◽  
Leaf Nitrogen Content ◽  
Legacy Effects ◽  
Freezing Resistance ◽  
Lower Growth ◽  
Water Deficits

Abstract Low temperatures and drought are the main environmental factors affecting plant growth and productivity across most of the terrestrial biomes. The objective of this study was to analyze the effects of water deficits before the onset of low temperatures in winter to enhance freezing resistance in olive trees. The study was carried out near the coast of Chubut, Argentina. Plants of five olive cultivars were grown out-door in pots and exposed to different water deficit treatments. We assessed leaf water relations, ice nucleation temperature (INT), cell damage (LT50), plant growth and leaf nitrogen content during summer and winter in all cultivars and across water deficit treatments. Leaf INT and LT50 decreased significantly from summer to winter within each cultivar and between treatments. We observed a trade-off between resources allocation to freezing resistance and vegetative growth, such that an improvement in resistance to sub-zero temperatures was associated to lower growth in tree height. Water deficit applied during summer increased the amount of osmotically active solutes and decreased the leaf water potentials. This type of legacy effects persists during the winter after the water deficit even when treatment was removed, because of natural rainfalls.

Nitrogen accumulation and partitioning by three grain legumes in response to soil water deficits

1989 ◽  
Vol 22 (1) ◽  
pp. 33-44 ◽  
Author(s):  
J.D. Devries ◽  
J.M. Bennett ◽  
K.J. Boote ◽  
S.L. Albrecht ◽  
C.E. Maliro
Keyword(s):  
Soil Water ◽  
Grain Legumes ◽  
Nitrogen Accumulation ◽  
Water Deficits
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