Inhibitory Effects of Methylglyoxal on Light-Induced Stomatal Opening and Inward K+ Channel Activity in Arabidopsis

Methylglyoxal (MG) is a reactive aldehyde derived by glycolysis. In Arabidopsis, MG inhibited light-induced stomatal opening in a dose-dependent manner. It significantly inhibited both inward-rectifying potassium (K in ) channels in guard-cell protoplasts and an Arabidopsis K in channel, KAT1, heter...

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Veröffentlicht in:	Bioscience, biotechnology, and biochemistry biotechnology, and biochemistry, 2012, Vol.76 (3), p.617-619
Hauptverfasser:	HOQUE, Tahsina Sharmin, OKUMA, Eiji, URAJI, Misugi, FURUICHI, Takuya, SASAKI, Takayuki, HOQUE, Md. Anamul, NAKAMURA, Yoshimasa, MURATA, Yoshiyuki
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals Arabidopsis Arabidopsis - cytology Arabidopsis - drug effects Arabidopsis - metabolism Arabidopsis - radiation effects Arabidopsis Proteins - antagonists & inhibitors Arabidopsis Proteins - genetics Biological and medical sciences Fundamental and applied biological sciences. Psychology inward-rectifying potassium channel KAT1 Light methylglyoxal Oocytes - metabolism Plant Stomata - anatomy & histology Plant Stomata - drug effects Plant Stomata - radiation effects Potassium Channel Blockers - pharmacology Potassium Channels, Inwardly Rectifying - antagonists & inhibitors Potassium Channels, Inwardly Rectifying - genetics Protoplasts - drug effects Protoplasts - metabolism Protoplasts - radiation effects Pyruvaldehyde - pharmacology stomatal opening Xenopus laevis - genetics
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Zusammenfassung:	Methylglyoxal (MG) is a reactive aldehyde derived by glycolysis. In Arabidopsis, MG inhibited light-induced stomatal opening in a dose-dependent manner. It significantly inhibited both inward-rectifying potassium (K in ) channels in guard-cell protoplasts and an Arabidopsis K in channel, KAT1, heterologously expressed in Xenopus oocytes. Thus it appears that MG inhibition of stomatal opening involves MG inhibition of K + influx into guard cells.
ISSN:	0916-8451 1347-6947
DOI:	10.1271/bbb.110885