the histidine kinase ahk5 integrates endogenous and environmental signals in arabidopsis guard cells组氨酸激酶ahk5集成在拟南芥保卫细胞内源性和环境信号.pdf

The Histidine Kinase AHK5 Integrates Endogenous and Environmental Signals in Arabidopsis Guard Cells 1,5 ´ 2 2 2 ¨ 2 Radhika Desikan *, Jakub Horak , Christina Chaban , Virtudes Mira-Rodado , Janika Witthoft , Kirstin 3 2 5 3 4 5 Elgass , Christopher Grefen , Man-Kim Cheung , Alfred J. Meixner , Richard Hooley , Steven John Neill , 5 2 John Travers Hancock , Klaus Harter * ¨ ¨ ¨ 1 Division of Biology, Imperial College London, London, United Kingdom, 2 Zentrum fur Molekularbiologie der Pflanzen / Pflanzenphysiologie, Universitat Tubingen, ¨ ¨ ¨ ¨ Tu bingen, Germany, 3 Department of Nano Optics, Institute for Physical and Theoretical Chemistry, Universitat Tubingen, Tubingen, Germany, 4 Department of Biology and Biochemistry, University of Bath, Bath, United Kingdom, 5 Centre for Research in Plant Science, University of the West of England, Bristol, United Kingdom Abstract Background: Stomatal guard cells monitor and respond to environmental and endogenous signals such that the stomatal aperture is continually optimised for water use efficiency. A key signalling molecule produced in guard cells in response to plant hormones, light, carbon dioxide and pathogen-derived signals is hydrogen peroxide