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Jasmonic acid and salicylic acid play minor roles in stomatal regulation by CO 2 , abscisic acid, darkness, vapor pressure deficit, and ozone
Year:
2021
Source of publication :
The plant journal
Authors :
Azoulay, Tamar
;
.
Volume :
Co-Authors:

Olena Zamora, 
Sebastian Schulze, 
Tamar Azoulay-Shemer, 
Helen Parik, 
Jaanika Unt, 
Mikael Brosché,
 
Julian I. Schroeder, 
Dmitry Yarmolinsky, 
Hannes Kollist

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

Jasmonic acid (JA) and salicylic acid (SA) regulate stomatal closure, preventing pathogen invasion into plants. However, to which extent abscisic acid (ABA), SA, and JA interact and what the roles of SA and JA are in stomatal responses to environmental cues remains unclear. Here, by using intact plant gas-exchange measurements in JA and SA single and double mutants, we show that stomatal responsiveness to CO2, light intensity, ABA, high vapor pressure deficit, and ozone either did not or for some stimuli only very slightly depended on JA and SA biosynthesis and signaling mutants, including dde2, sid2, coi1jai1myc2, and npr1 alleles. While stomata in the studied mutants clearly responded to ABA, CO2, light, and ozone, ABA-triggered stomatal closure in npr1-1 was slightly accelerated comparing with the wild type. Stomatal re-opening after ozone pulses was quicker in the coi1-16 mutant than in the wild type. In intact Arabidopsis plants, spraying with methyl-JA led to only a modest reduction in stomatal conductance 80 min after the treatments, whereas ABA and CO2 induced pronounced stomatal closure within minutes. We could not document a reduction of stomatal conductance after spraying with SA. Coronatine-induced stomatal opening was initiated slowly after 1.5-2 h and reached a maximum in 3 h after spraying intact plants. Our results suggest that ABA, CO2 and light are major regulators of rapid guard cell signaling, whereas JA and SA could play only minor roles in whole-plant stomatal response to environmental cues in Arabidopsis and tomato.

Note:
Related Files :
CO2
jasmonic acid
Ozone
Salicylic acid
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More details
DOI :
10.1111/tpj.15430
Article number:
0
Affiliations:
Database:
PubMed
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
55763
Last updated date:
02/03/2022 17:27
Creation date:
27/07/2021 16:49
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Scientific Publication
Jasmonic acid and salicylic acid play minor roles in stomatal regulation by CO 2 , abscisic acid, darkness, vapor pressure deficit, and ozone

Olena Zamora, 
Sebastian Schulze, 
Tamar Azoulay-Shemer, 
Helen Parik, 
Jaanika Unt, 
Mikael Brosché,
 
Julian I. Schroeder, 
Dmitry Yarmolinsky, 
Hannes Kollist

Jasmonic acid and salicylic acid play minor roles in stomatal regulation by CO 2 , abscisic acid, darkness, vapor pressure deficit, and ozone .

Jasmonic acid (JA) and salicylic acid (SA) regulate stomatal closure, preventing pathogen invasion into plants. However, to which extent abscisic acid (ABA), SA, and JA interact and what the roles of SA and JA are in stomatal responses to environmental cues remains unclear. Here, by using intact plant gas-exchange measurements in JA and SA single and double mutants, we show that stomatal responsiveness to CO2, light intensity, ABA, high vapor pressure deficit, and ozone either did not or for some stimuli only very slightly depended on JA and SA biosynthesis and signaling mutants, including dde2, sid2, coi1jai1myc2, and npr1 alleles. While stomata in the studied mutants clearly responded to ABA, CO2, light, and ozone, ABA-triggered stomatal closure in npr1-1 was slightly accelerated comparing with the wild type. Stomatal re-opening after ozone pulses was quicker in the coi1-16 mutant than in the wild type. In intact Arabidopsis plants, spraying with methyl-JA led to only a modest reduction in stomatal conductance 80 min after the treatments, whereas ABA and CO2 induced pronounced stomatal closure within minutes. We could not document a reduction of stomatal conductance after spraying with SA. Coronatine-induced stomatal opening was initiated slowly after 1.5-2 h and reached a maximum in 3 h after spraying intact plants. Our results suggest that ABA, CO2 and light are major regulators of rapid guard cell signaling, whereas JA and SA could play only minor roles in whole-plant stomatal response to environmental cues in Arabidopsis and tomato.

Scientific Publication
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