Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
ABA-dependent and ABA-independent functions of RCAR5/PYL11 in response to cold stress
View through CrossRef
AbstractArabidopsis thaliana has 14 abscisic acid (ABA) receptors—PYR1/PYLs/RCARs—which have diverse and redundant functions in ABA signaling; however, the precise role of these ABA receptors remains to be elucidated. Here, we report the functional characterization of RCAR5/PYL11 in response to cold stress. Expression of RCAR5 gene in dry seeds and leaves was ABA-dependent and ABA-independent, respectively. Under cold stress conditions, seed germination was markedly delayed in RCAR5-overexpressing (Pro35S:RCAR5) plants, but not in Pro35S:RCAR5 in ABA-deficient (aba1-6) mutant background. Leaves of Pro35S:RCAR5 plants showed enhanced stomatal closure—independent of ABA—and high expression levels of cold, dehydration, and/or ABA-responsive genes; these traits conferred enhanced freezing tolerance. Our data suggest that RCAR5 functions in response to cold stress by delaying seed germination and inducing rapid stomatal closure via ABA-dependent and ABA-independent pathways, respectively.
Title: ABA-dependent and ABA-independent functions of RCAR5/PYL11 in response to cold stress
Description:
AbstractArabidopsis thaliana has 14 abscisic acid (ABA) receptors—PYR1/PYLs/RCARs—which have diverse and redundant functions in ABA signaling; however, the precise role of these ABA receptors remains to be elucidated.
Here, we report the functional characterization of RCAR5/PYL11 in response to cold stress.
Expression of RCAR5 gene in dry seeds and leaves was ABA-dependent and ABA-independent, respectively.
Under cold stress conditions, seed germination was markedly delayed in RCAR5-overexpressing (Pro35S:RCAR5) plants, but not in Pro35S:RCAR5 in ABA-deficient (aba1-6) mutant background.
Leaves of Pro35S:RCAR5 plants showed enhanced stomatal closure—independent of ABA—and high expression levels of cold, dehydration, and/or ABA-responsive genes; these traits conferred enhanced freezing tolerance.
Our data suggest that RCAR5 functions in response to cold stress by delaying seed germination and inducing rapid stomatal closure via ABA-dependent and ABA-independent pathways, respectively.
Related Results
Effect of abscisic acid on rice defense mechanism against Fusarium oxysporum
Effect of abscisic acid on rice defense mechanism against Fusarium oxysporum
Fusarium oxysporum is one of the most destructive pathogens which causes rice seedling blight. ABA is part of a large signaling system that provides an effective system against mic...
Abscisic Acid Inhibits Cortical Microtubules Reorganization and Enhances Ultraviolet-B Tolerance in Arabidopsis thaliana
Abscisic Acid Inhibits Cortical Microtubules Reorganization and Enhances Ultraviolet-B Tolerance in Arabidopsis thaliana
Ultraviolet-B (UV-B) radiation is one of the important environmental factors limiting plant growth. Both abscisic acid (ABA) and microtubules have been previously reported to be in...
FRET-based reporters for the direct visualization of abscisic acid concentration changes and distribution in Arabidopsis
FRET-based reporters for the direct visualization of abscisic acid concentration changes and distribution in Arabidopsis
Abscisic acid (ABA) is a plant hormone that regulates plant growth and development and mediates abiotic stress responses. Direct cellular monitoring of dynamic ABA concentration ch...
CONSTITUTIVELY PHOTOMORPHOGENIC1 promotes ABA‐mediated inhibition of post‐germination seedling establishment
CONSTITUTIVELY PHOTOMORPHOGENIC1 promotes ABA‐mediated inhibition of post‐germination seedling establishment
SummaryUnder acute stress conditions, precocious seedling development may result in the premature death of young seedlings, before they switch to autotrophic growth. The phytohormo...
Unlocking ABA's role in rice cold tolerance: Insights from Zhonghua 11 and Kasalath
Unlocking ABA's role in rice cold tolerance: Insights from Zhonghua 11 and Kasalath
Abstract
Cold stress limits rice (Oryza sativa L.) production in cooler climates. This study uncovers how abscisic acid (ABA) signaling enhances cold tolerance in the rice ...
Physiology of abscisic acid (ABA) in roots under stress—a review of the relationship between root ABA and radial water and ABA flows
Physiology of abscisic acid (ABA) in roots under stress—a review of the relationship between root ABA and radial water and ABA flows
Abscisic acid (ABA), the universal plant stress hormone, is accumulated in roots subjected to a range of external stresses, including drought, salinity, and nutrient deficiencies. ...
Improving Freezing Tolerance of ‘Chambourcin’ Grapevines with Exogenous Abscisic Acid
Improving Freezing Tolerance of ‘Chambourcin’ Grapevines with Exogenous Abscisic Acid
The purpose of this study was to develop a protocol to increase freezing tolerance of field-grown ‘Chambourcin’ grapevines (Vitis spp.) using exogenous abscisic acid (ABA). The spe...
Strigolactones and abscisic acid interactions affect plant development and response to abiotic stresses
Strigolactones and abscisic acid interactions affect plant development and response to abiotic stresses
AbstractStrigolactones (SL) are the youngest group of plant hormones responsible for shaping plant architecture, especially the branching of shoots. However, recent studies provide...