Changes in water relations and endogenous abscisic acid content of wheat and barley grains and embryos during development

1991 ◽  
Vol 14 (4) ◽  
pp. 443-446 ◽  
Author(s):  
P. C. MORRIS ◽  
P. C. JEWER ◽  
D. J. BOWLES
Keyword(s):  
Abscisic Acid ◽  
Water Relations ◽  
Acid Content ◽  
Endogenous Abscisic Acid ◽  
Barley Grains ◽  
Abscisic Acid Content

Effect of ethylene perception inhibitor on growth, water relations, and abscisic acid content in wheat plants under water deficit

2012 ◽  
Vol 59 (4) ◽  
pp. 573-580 ◽  
Author(s):  
G. V. Sharipova ◽  
D. S. Veselov ◽  
G. R. Kudoyarova ◽  
M. D. Timergalin ◽  
S. Wilkinson
Keyword(s):  
Abscisic Acid ◽  
Water Deficit ◽  
Water Relations ◽  
Acid Content ◽  
Abscisic Acid Content

scholarly journals Drought Response of Young Apple Trees on Three Rootstocks. II. Gas Exchange, Chlorophyll Fluorescence, Water Relations, and Leaf Abscisic Acid

1997 ◽  
Vol 122 (6) ◽  
pp. 841-848 ◽  
Author(s):  
R. Thomas Fernandez ◽  
Ronald L. Perry ◽  
James A. Flore
Keyword(s):  
Abscisic Acid ◽  
Chlorophyll Fluorescence ◽  
Drought Stress ◽  
Gas Exchange ◽  
Water Relations ◽  
Acid Content ◽  
Recovery Period ◽  
Leaf Conductance ◽  
Apple Trees ◽  
Abscisic Acid Content

`Imperial Gala' apple trees (Malus ×domestica Borkh.) on M.9 EMLA, MM.111, and Mark rootstocks were subjected to two drought-stress and recovery periods in a rainshelter. Water relations, gas-exchange parameters per unit leaf area and per tree, chlorophyll fluorescence, and leaf abscisic acid content were determined during each stress and recovery period. Whole-plant calculated gas exchange best indicated plant response to drought stress, with consistent reductions in CO2 assimilation, transpiration, and leaf conductance. Variable and maximal chlorophyll fluorescence and fluorescence quenching were not as sensitive to stress. Other fluorescence parameters showed little difference. The most consistent decreases due to stress for gas exchange per square meter were in transpiration and leaf conductance, with few differences in CO2 assimilation and fewer for mesophyll conductance, internal CO2 concentration, and water-use efficiency. Leaf water potential was consistently lower during drought stress and returned to control values upon irrigation. Leaf abscisic acid content was higher for drought-stressed trees on M.9 EMLA than control trees during the stress periods but inconsistently different for the other rootstock treatments. Trees on M.9 EMLA were least affected by drought stress, MM.111 was intermediate, and Mark was the most sensitive; these results are consistent with the growth data.

scholarly journals Abscisic acid content during cold hardening of barley and wheat cultivars with different freezing toler

2011 ◽  
Vol 48 (No. 11) ◽  
pp. 490-493
Author(s):  
Z. Faltusová-Kadlecová ◽  
M. Faltus ◽  
I. Prášil
Keyword(s):  
Abscisic Acid ◽  
Freezing Tolerance ◽  
Acid Content ◽  
The Other ◽  
Cold Hardening ◽  
Wheat Cultivars ◽  
Endogenous Abscisic Acid ◽  
Significant Change ◽  
Hydroponically Grown ◽  
Abscisic Acid Content

Endogenous content of abscisic acid was studied in a set of two winter cultivars of barleys (Lunet, Cenader), one spring cultivar (Akcent) and five winter cultivars of wheat (Mironovská, Samanta, Šárka, Zdar, Apache) and one spring cultivar (Leguan) in the course of cold hardening of hydroponically grown plants. Freezing tolerance was also determined in all barley and wheat cultivars under study. In none of the barley varieties did cold hardening of plants induce any significant change in abscisic acid content. In wheat plants exposed to cold hardening, the cultivars Apache and Leguan showed a slight transitory increase in abscisic acid content. Abscisic acid content in leaves was very similar in the other wheat cultivars. Neither in barley nor in wheat was the level of freezing tolerance associated with endogenous abscisic acid content or with its transitory changes during cold hardening.

Accumulation of abscisic acid in cotton fibre and seed of normal and abnormal bolls

2001 ◽  
Vol 137 (4) ◽  
pp. 445-451 ◽  
Author(s):  
SONAL J. GOKANI ◽  
VRINDA S. THAKER
Keyword(s):  
Abscisic Acid ◽  
Water Content ◽  
Acid Content ◽  
Marked Decrease ◽  
Age Groups ◽  
Dry Weight ◽  
Dry Matter Accumulation ◽  
Endogenous Abscisic Acid ◽  
Aba Content ◽  
Abscisic Acid Content

Cotton (Gossypium hirsutum L.) yield and quality is affected by altered fruiting patterns with progress in season. The present study was conducted to analyse normal and altered (abnormal) boll (fruit) development at maturation phase. Both normal and abnormal bolls of the same age groups were analysed for growth in terms of dry weight, water content and endogenous abscisic acid (ABA) content of fibre and seed. Endogenous level of ABA was estimated by using antibodies raised against ABA–protein conjugate. To amplify the reaction, indirect ELISA (Enzyme Linked Immuno Sorbent Assay) was performed. A marked decrease in dry matter accumulation (DMA) of seed and fibre was observed in abnormal bolls as the season progressed. Fibre from the abnormal bolls showed marked variation in endogenous ABA content, however, in abnormal seeds water content and endogenous abscisic acid content showed significant variation compared to that of normal bolls. From the results, it is concluded that a marked decrease in seed dry weight may be because of a decrease in water content and accumulation of higher endogenous abscisic acid content, whereas, the major reason for reduced fibre weight may be due to accumulation of endogenous abscisic acid.

scholarly journals Phytochrome-controlled level of growth substances in etiolated oat seedlings

2014 ◽  
Vol 61 (3-4) ◽  
pp. 381-388
Author(s):  
Jan Kopcewicz ◽  
Kazimierz Madela
Keyword(s):  
Abscisic Acid ◽  
Acid Content ◽  
Red Light ◽  
Light Irradiation ◽  
Growth Substances ◽  
Photostationary State ◽  
Endogenous Abscisic Acid ◽  
Abscisic Acid Content

Irradiation with red light of coleoptiles and leaves of etiolated oat seedlings, causing photoconversion of phytochrome mainly into P<sub>fr</sub>, leads to the release of free auxins and free gibberellins from conjugated forms. The effect of red light is reversible by far-red light irradiation. A correlation between the photostationary state of phytochrome and endogenous abscisic acid content was not found.

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