Light-harvesting chlorophyll a/b-binding proteins, positively involved in abscisic acid signalling, require a transcription repressor, WRKY40, to balance their function

Light-harvesting chlorophyll a/b-binding proteins, positively involved in abscisic acid signalling, require a transcription repressor, WRKY40, to balance their function

The light-harvesting chlorophyll a/b-binding (LHCB) proteins are the apoproteins of the light-harvesting complex of photosystem II. In the present study, we observed that downregulation of any of the six LHCB genes resulted in abscisic acid (ABA)-insensitive phenotypes in seed germination and post-g...

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Veröffentlicht in:Journal of experimental botany. - 1985. - 64(2013), 18 vom: 15. Dez., Seite 5443-56
1. Verfasser: Liu, Rui (VerfasserIn)
Weitere Verfasser: Xu, Yan-Hong, Jiang, Shang-Chuan, Lu, Kai, Lu, Yan-Fen, Feng, Xiu-Jing, Wu, Zhen, Liang, Shan, Yu, Yong-Tao, Wang, Xiao-Fang, Zhang, Da-Peng
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Abscisic acid signalling Arabidopsis thaliana WRKY40 transcription factor. light-harvesting chlorophyll a/b-binding protein post-germination growth seed germination Arabidopsis Proteins CAB2 protein, Arabidopsis mehr... Chlorophyll Binding Proteins LHCB4.1 protein, Arabidopsis LHCB5 protein, Arabidopsis Lhcb6 protein, Arabidopsis Light-Harvesting Protein Complexes Photosystem II Protein Complex Transcription Factors WRKY40 protein, Arabidopsis Abscisic Acid 72S9A8J5GW Lyases EC 4.- GUN5 protein, Arabidopsis EC 4.99.1.-
Beschreibung
Zusammenfassung:The light-harvesting chlorophyll a/b-binding (LHCB) proteins are the apoproteins of the light-harvesting complex of photosystem II. In the present study, we observed that downregulation of any of the six LHCB genes resulted in abscisic acid (ABA)-insensitive phenotypes in seed germination and post-germination growth, demonstrating that LHCB proteins are positively involved in these developmental processes in response to ABA. ABA was required for full expression of different LHCB members and physiologically high levels of ABA enhanced LHCB expression. The LHCB members were shown to be targets of an ABA-responsive WRKY-domain transcription factor, WRKY40, which represses LHCB expression to balance the positive function of the LHCBs in ABA signalling. These findings revealed that ABA is an inducer that fine-tunes LHCB expression at least partly through repressing the WRKY40 transcription repressor in stressful conditions in co-operation with light, which allows plants to adapt to environmental challenges
Beschreibung:Date Completed 26.08.2014
Date Revised 21.10.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1460-2431
DOI:10.1093/jxb/ert307