Response of Tomato Plants to Stressful Temperatures : INCREASE IN ABSCISIC ACID CONCENTRATIONS.
Jaleh Daie,William F. Campbell +1 more
TLDR
Temperature stress, like several other environmental stresses, induces the plant to produce high levels of ABA, and ABA may be a common mediator for all plant stresses.Abstract:
To investigate the abscisic acid (ABA) production of tomato (Mill.) plants in response to diurnal stressful temperatures, five-week old seedlings were exposed to day/night temperatures of 10/5, 15/10, 25/15, 35/25, or 45/35 C. The daylength was 16 hours with a light intensity of approximately 400 microeinsteins per meter per second. Plant tops were sampled at 12, 24, 48, and 72 hours. Free, alkaline-hydrolyzable (conjugated), and total ABA quantities were measured using standard gas chromatographic techniques. All temperature regimes significantly increased both free and conjugated ABA levels over concentrations in control plants (25/15 C). The highest ABA levels were observed in plants exposed to the coolest temperature of 10/5 C. Since normal water potentials were obtained in plants of all treatments, the observed ABA response was not due to temperature-induced water stress. Therefore, temperature stress, like several other environmental stresses, induces the plant to produce high levels of ABA. Because of the similar involvement of ABA in temperature-induced and other environmental stresses, ABA may be a common mediator for all plant stresses.read more
Citations
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Journal ArticleDOI
Abscisic Acid and Abiotic Stress Tolerance in Crop Plants
TL;DR: The role of ABA in response to abiotic stress at the molecular level and ABA signaling is discussed and the effect of A BA in respect to gene expression is dealt with.
Journal ArticleDOI
Responses of Plants to Low, Nonfreezing Temperatures: Proteins, Metabolism, and Acclimation
D. Graham,B. D. Patterson +1 more
TL;DR: In this paper, the authors used ABA, abscisic acid, CAM, Crassulacean acid metabolism, CR, chilling resistant, CS, chilling-sensitive, DNP, 2,4-dinitrophenol, FCCP, carbonyl cyanide, p-tri-hoxy phenylhydrazone, PAL, phenylalanine ammonia lyase, PEP, phosphoenol-pyruvate; PFK, phosphofructokinase; RBPCase, ribulose bisphosphate carbox
BookDOI
Stress and stress coping in cultivated plants
TL;DR: The overall implications of biological stress, which reflects the combination of water and drought stress, and environmental pollution stress, are studied.
Book ChapterDOI
Calcium signaling during abiotic stress in plants.
TL;DR: Ca2+ signaling has been implicated in plant responses to a number of abiotic stresses including low temperature, osmotic stress, heat, oxidative stress, anoxia, and mechanical perturbation, which are reviewed in this article.
References
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Journal ArticleDOI
Factors Affecting the Biosynthesis of Abscisic Acid
B. V. Milborrow,D. R. Robinson +1 more
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