Hydrogen sulphide regulates inward-rectifying K+ channels in conjunction with stomatal closure

Papanatsiou, M., Scuffi, D., Blatt, M. R. and Garia-Mata, C. (2015) Hydrogen sulphide regulates inward-rectifying K+ channels in conjunction with stomatal closure. Plant Physiology, 168(1), pp. 29-35. (doi:10.​1104/​pp.​114.​256057) (PMID:25770153) (PMCID:PMC4424018)

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Publisher's URL: http://www.plantphysiol.org/content/early/2015/03/13/pp.114.256057.short

Abstract

Hydrogen sulphide (H2S) is the third biological gasotransmitter and, in animals, affects many physiological processes by modulating ion channels. H2S has been reported to protect plants from oxidative stress in diverse physiological responses. H2S closes stomata, but the underlying mechanism remains elusive. Here we report the selective inactivation of current carried by inward-rectifying K+ channels (IKIN) of tobacco guard cells and demonstrate its close parallel with stomatal closure evoked by submicromolar concentrations of H2S. Experiments to scavenge H2S suggested an effect that is separable from that of abscisic acid, which is associated with water stress. Thus, H2S appears to associate with a new and as yet unresolved signalling pathway that selectively targets IKIN.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Blatt, Professor Michael and Papanatsiou, Miss Maria
Authors: Papanatsiou, M., Scuffi, D., Blatt, M. R., and Garia-Mata, C.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:Plant Physiology
Publisher:American Society of Plant Biologists
ISSN:0032-0889
ISSN (Online):1532-2548
Copyright Holders:Copyright © 2015 American Society of Plant Biologists
First Published:First published in Plant Physiology 168(1):29-35
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
563751MAGIC - A Multi-tiered approach to generating increased carbon dioxide in the chloroplastMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/I024496/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
616991Directed control of secretory vesicle fusionMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/K015893/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
626121Stomatal-based systems analysis of water use efficiencyMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/L001276/1RI MOLECULAR CELL & SYSTEMS BIOLOGY