Actin filament reorganisation controlled by the SCAR/WAVE complex mediates stomatal response to darkness

© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 215(2017), 3 vom: 01. Aug., Seite 1059-1067
1. Verfasser: Isner, Jean-Charles (VerfasserIn)
Weitere Verfasser: Xu, Zaoxu, Costa, Joaquim Miguel, Monnet, Fabien, Batstone, Thomas, Ou, Xiaobin, Deeks, Michael J, Genty, Bernard, Jiang, Kun, Hetherington, Alistair M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Arp2/3 complex SCAR/WAVE complex Stomata actin filaments darkness Actin-Related Protein 2-3 Complex Arabidopsis Proteins Bridged Bicyclo Compounds, Heterocyclic Multiprotein Complexes mehr... Protein Subunits Thiazolidines Cytochalasin D 22144-77-0 Abscisic Acid 72S9A8J5GW latrunculin B LW7U308U7U Calcium Chloride M4I0D6VV5M
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520 |a Stomata respond to darkness by closing to prevent excessive water loss during the night. Although the reorganisation of actin filaments during stomatal closure is documented, the underlying mechanisms responsible for dark-induced cytoskeletal arrangement remain largely unknown. We used genetic, physiological and cell biological approaches to show that reorganisation of the actin cytoskeleton is required for dark-induced stomatal closure. The opal5 mutant does not close in response to darkness but exhibits wild-type (WT) behaviour when exposed to abscisic acid (ABA) or CaCl2 . The mutation was mapped to At5g18410, encoding the PIR/SRA1/KLK subunit of the ArabidopsisSCAR/WAVE complex. Stomata of an independent allele of the PIR gene (Atpir-1) showed reduced sensitivity to darkness and F1 progenies of the cross between opal5 and Atpir-1 displayed distorted leaf trichomes, suggesting that the two mutants are allelic. Darkness induced changes in the extent of actin filament bundling in WT. These were abolished in opal5. Disruption of filamentous actin using latrunculin B or cytochalasin D restored wild-type stomatal sensitivity to darkness in opal5. Our findings suggest that the stomatal response to darkness is mediated by reorganisation of guard cell actin filaments, a process that is finely tuned by the conserved SCAR/WAVE-Arp2/3 actin regulatory module 
650 4 |a Journal Article 
650 4 |a Arp2/3 complex 
650 4 |a SCAR/WAVE complex 
650 4 |a Stomata 
650 4 |a actin filaments 
650 4 |a darkness 
650 7 |a Actin-Related Protein 2-3 Complex  |2 NLM 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a Bridged Bicyclo Compounds, Heterocyclic  |2 NLM 
650 7 |a Multiprotein Complexes  |2 NLM 
650 7 |a Protein Subunits  |2 NLM 
650 7 |a Thiazolidines  |2 NLM 
650 7 |a Cytochalasin D  |2 NLM 
650 7 |a 22144-77-0  |2 NLM 
650 7 |a Abscisic Acid  |2 NLM 
650 7 |a 72S9A8J5GW  |2 NLM 
650 7 |a latrunculin B  |2 NLM 
650 7 |a LW7U308U7U  |2 NLM 
650 7 |a Calcium Chloride  |2 NLM 
650 7 |a M4I0D6VV5M  |2 NLM 
700 1 |a Xu, Zaoxu  |e verfasserin  |4 aut 
700 1 |a Costa, Joaquim Miguel  |e verfasserin  |4 aut 
700 1 |a Monnet, Fabien  |e verfasserin  |4 aut 
700 1 |a Batstone, Thomas  |e verfasserin  |4 aut 
700 1 |a Ou, Xiaobin  |e verfasserin  |4 aut 
700 1 |a Deeks, Michael J  |e verfasserin  |4 aut 
700 1 |a Genty, Bernard  |e verfasserin  |4 aut 
700 1 |a Jiang, Kun  |e verfasserin  |4 aut 
700 1 |a Hetherington, Alistair M  |e verfasserin  |4 aut 
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773 1 8 |g volume:215  |g year:2017  |g number:3  |g day:01  |g month:08  |g pages:1059-1067 
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