The Role of ENHANCED RESPONSES TO ABA1 (ERA1) in Arabidopsis Stomatal Responses Is Beyond ABA Signaling

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Jalakas , P , Huang , Y-C , Yeh , Y-H , Zimmerli , L , Merilo , E , Kollist , H & Brosche , M 2017 , ' The Role of ENHANCED RESPONSES TO ABA1 (ERA1) in Arabidopsis Stomatal Responses Is Beyond ABA Signaling ' , Plant Physiology , vol. 174 , no. 2 , pp. 665-671 . https://doi.org/10.1104/pp.17.00220

Title: The Role of ENHANCED RESPONSES TO ABA1 (ERA1) in Arabidopsis Stomatal Responses Is Beyond ABA Signaling
Author: Jalakas, Pirko; Huang, Yi-Chun; Yeh, Yu-Hung; Zimmerli, Laurent; Merilo, Ebe; Kollist, Hannes; Brosche, Mikael
Contributor: University of Helsinki, Biosciences
University of Helsinki, Biosciences
Date: 2017-06
Language: eng
Number of pages: 7
Belongs to series: Plant Physiology
ISSN: 0032-0889
URI: http://hdl.handle.net/10138/218284
Abstract: Proper stomatal responses are essential for plant function in an altered environment. The core signaling pathway for abscisic acid (ABA)-induced stomatal closure involves perception of the hormone that leads to the activation of guard cell anion channels by the protein kinase OPEN STOMATA1. Several other regulators are suggested to modulate the ABA signaling pathway, including the protein ENHANCED RESPONSE TO ABA1 (ERA1), that encodes the farnesyl transferase beta-subunit. The era1 mutant is hypersensitive to ABA during seed germination and shows a more closed stomata phenotype. Using a genetics approach with the double mutants era1 abi1-1 and era1 ost1, we show that while era1 suppressed the high stomatal conductance of abi1-1 and ost1, the ERA1 function was not required for stomatal closure in response to ABA and environmental factors. Further experiments indicated a role for ERA1 in blue light-induced stomatal opening. In addition, we show that ERA1 function in disease resistance was independent of its role in stomatal regulation. Our results indicate a function for ERA1 in stomatal opening and pathogen immunity.
Subject: ABSCISIC-ACID RESPONSES
REDUCED AIR HUMIDITY
PROTEIN FARNESYLATION
NEGATIVE REGULATOR
CHANNEL ACTIVITY
INNATE IMMUNITY
GUARD-CELLS
H+-ATPASE
CLOSURE
KINASE
1183 Plant biology, microbiology, virology
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