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|a 10.1093/jxb/erae168
|2 doi
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|a pubmed24n1378.xml
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|a (DE-627)NLM371172594
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|a (NLM)38628155
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|a (PII)erae168
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Piechatzek, Adriane
|e verfasserin
|4 aut
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|a GABA does not regulate stomatal CO2 signalling in Arabidopsis
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 17.04.2024
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a © The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Optimal stomatal regulation is important for plant adaptation to changing environmental conditions and for maintaining crop yield. The guard-cell signal GABA is produced from glutamate by Glutamate Decarboxylase (GAD) during a reaction that generates carbon dioxide (CO2) as a by-product. Here, we investigated a putative connection between GABA signalling and the more clearly defined CO2 signalling pathway in guard cells. The GABA-deficient mutant lines gad2-1, gad2-2 and gad1/2/4/5 were examined for stomatal sensitivity to various CO2 concentrations. Our findings show a phenotypical discrepancy between the allelic mutant lines gad2-1 and gad2-2 - a weakened CO2 response in gad2-1 (GABI_474_E05) in contrast to a wild-type response in gad2-2 (SALK_028819) and gad1/2/4/5. Through transcriptomic and genomic investigation, we traced the response of gad2-1 to a deletion of full-length Mitogen-activated protein kinase 12 (MPK12) in the GABI-KAT line, thereafter as renamed gad2-1*. Guard cell-specific complementation of MPK12 restored the gad2-1* CO2 phenotype, which confirms the proposed importance of MPK12 to CO2 sensitivity. Additionally, we found that stomatal opening under low atmospheric CO2 occurs independently of the GABA-modulated opening-channel ALMT9. Our results confirm that GABA has a role in modulating the rate of stomatal opening and closing - but not in response to CO2 per se
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|a Journal Article
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|a ALMTs
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| 650 |
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|a CO2 signalling
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| 650 |
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|a GABA
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|a MPK12
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| 650 |
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|a genomics
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| 650 |
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|a stomatal movement
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| 700 |
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|a Feng, Xueying
|e verfasserin
|4 aut
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| 700 |
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|a Sai, Na
|e verfasserin
|4 aut
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|a Yi, Changyu
|e verfasserin
|4 aut
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|a Hurgobin, Bhavna
|e verfasserin
|4 aut
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| 700 |
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|a Lewsey, Mathew
|e verfasserin
|4 aut
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| 700 |
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|a Herrmann, Johannes
|e verfasserin
|4 aut
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|a Dittrich, Marcus
|e verfasserin
|4 aut
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| 700 |
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|a Ache, Peter
|e verfasserin
|4 aut
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|a Müller, Tobias
|e verfasserin
|4 aut
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|a Kromdijk, Johannes
|e verfasserin
|4 aut
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| 700 |
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|a Hedrich, Rainer
|e verfasserin
|4 aut
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| 700 |
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|a Xu, Bo
|e verfasserin
|4 aut
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| 700 |
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|a Gilliham, Matthew
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g (2024) vom: 17. Apr.
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g year:2024
|g day:17
|g month:04
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|u http://dx.doi.org/10.1093/jxb/erae168
|3 Volltext
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