Abscisic Acid as a Factor in Modifying Drought Resistance

1989 ◽  
pp. 27-37 ◽  
Author(s):  
S. A. Quarrie
Keyword(s):  
Abscisic Acid ◽  
Drought Resistance

The involvement of abscisic acid in hydrogen gas-enhanced drought resistance in tomato seedlings

2022 ◽  
Vol 292 ◽  
pp. 110631
Author(s):  
Mei Yan ◽  
Yandong Yao ◽  
Kaiping Mou ◽  
Yuanyuan Dan ◽  
Weitai Li ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Resistance ◽  
Hydrogen Gas ◽  
Tomato Seedlings

scholarly journals The Flowering Repressor SVP Confers Drought Resistance in Arabidopsis by Regulating Abscisic Acid Catabolism

2018 ◽  
Vol 11 (9) ◽  
pp. 1184-1197 ◽  
Author(s):  
Zhen Wang ◽  
Fuxing Wang ◽  
Yechun Hong ◽  
Juanjuan Yao ◽  
Zhizhong Ren ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Resistance

Mefluidide-induced drought resistance in seedlings of three conifer species

1993 ◽  
Vol 71 (8) ◽  
pp. 1087-1092
Author(s):  
Salim N. Silim ◽  
Robert D. Guy ◽  
Denis P. Lavender
Keyword(s):  
Abscisic Acid ◽  
Stomatal Conductance ◽  
Plant Growth ◽  
Drought Resistance ◽  
Picea Glauca ◽  
Cold Hardiness ◽  
Net Photosynthesis ◽  
Thuja Plicata ◽  
Red Cedar ◽  
Thuja Plicata Donn

Short-term effects of the plant growth retardant mefluidide on drought resistance were investigated in seedlings of western red cedar (Thuja plicata Donn), yellow cedar (Chamaecyparis nootkatensis D. Don), and white spruce (Picea glauca (Moench) Voss). Mefluidide was applied as a root drench at concentrations of 0, 0.1, and 0.4 mg∙L−1. Following this, seedlings were stressed by withholding water for a period of up to 7 days and then watering regularly thereafter. Stomatal conductance of the mefluidide-treated seedlings decreased significantly and remained lower than the control seedlings throughout the stress period. As a result of the decreased conductance, shoot water potentials in mefluidide-treated seedlings remained higher throughout the stress period. There was a decrease in net photosynthesis that was partially caused by stomatal limitations, the severity of which depended upon the concentration of mefluidide applied. Mefluidide treatment also resulted in an accumulation of abscisic acid in all three species, and this may have been responsible for the effects on stomatal conductance and water relations. In contrast, the mefluidide-treated seedlings had the highest rates of photosynthesis after rewatering, resulting primarily from a promotion of stomatal opening. Key words: stomatal conductance, water potential, photosynthesis, plant growth inhibitors, abscisic acid, cold hardiness.

scholarly journals DROUGHT RESISTANCE OF Sorghum bicolor. 5. GENOTYPIC DIFFERENCES IN THE CONCENTRATIONS OF FREE AND CONJUGATED ABSCISIC, PHASEIC AND INDOLE-3-ACETIC ACIDS IN LEAVES OF FIELD-GROWN DROUGHT-STRESSED PLANTS.

1983 ◽  
Vol 63 (1) ◽  
pp. 131-145 ◽  
Author(s):  
R. C. DURLEY ◽  
T. KANNANGARA ◽  
G. M. SIMPSON ◽  
N. SEETHARAMA
Keyword(s):  
Acetic Acid ◽  
Abscisic Acid ◽  
Grain Yield ◽  
Sorghum Bicolor ◽  
Drought Resistance ◽  
Genotypic Variation ◽  
Genotypic Differences ◽  
Phaseic Acid ◽  
Acid Yield ◽  
Indole 3 Acetic Acid

Concentrations of free and conjugated abscisic acid (AbA), phaseic acid (PA) and indole-3-acetic acid (IAA) were measured in leaves of sorghum (Sorghum bicolor (L.) Moench) genotypes grown in the field. Hormone levels were compared and related to grain yield stability under drought, expressed as the percentage reduction in grain yield (percent RGY) of drought-stressed compared to irrigated plants. Although hormone concentrations were similar in irrigated plants, there was considerable genotypic variation in drought-stressed plants. In a four genotype comparison during the panicle initiation stage, mean leaf AbA concentrations in drought-stressed plants were positively related to percent RGY. Furthermore, the slopes of regression lines of AbA on leaf water potential in stressed genotypes were also positively related to percent RGY. In contrast, PA and total AbA metabolite concentrations were negatively related to percent RGY, implying a higher efficiency of conversion of AbA to its metabolites in drought resistant than in drought-susceptible genotypes. There was genotypic variation in free and conjugated IAA concentration in leaves of stressed plants, but these concentrations were not directly related to percent RGY. Nevertheless, high levels of free and conjugated IAA were found at some periods in leaves of drought-susceptible genotypes. The positive relationship between free AbA concentration and percent RGY was confirmed in a nine genotype comparison. Mean leaf AbA concentrations during flowering and early grain filling in drought-stressed plants were found to be a significantly correlated (r = 0.86**) with percent RGY. It is concluded that it is possible to evaluate genotype drought resistance to a given stress treatment in sorghum by examination of AbA, PA and IAA concentations in leaves. The potential of the method as a tool for plant breeders is discussed.Key words: Sorghum bicolor, drought stress, abscisic acid, phaseic acid, indole-3-acetic acid, yield

Induction of drought resistance by abscisic acid and paclobutrazol in jack pine

1991 ◽  
Vol 8 (4) ◽  
pp. 415-421 ◽  
Author(s):  
J. G. Marshall ◽  
J. B. Scarratt ◽  
E. B. Dumbroff
Keyword(s):  
Abscisic Acid ◽  
Drought Resistance ◽  
Jack Pine
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