How Do Stomata Sense Reductions in Atmospheric Relative Humidity? |
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基金项目: | This work was supported by grants of the Bayerische Forschungsallianz (BayFOR), FORPLANTA to U.S. and R.H.; R.H. and K.A.S.A.-R. were supported by grants from the Strategic Technologies Program--National Science, Technology and Innovation Plan, Saudi Arabia Project No. 10-ENV1181-02. No conflict of interest declared. |
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摘 要: | Dear Editor, It has been known since the work of Francis Darwin that, in response to a reduction in atmospheric relative humidity (rh), stomatal aperture decreases. Screening for Arabidopsis mutants compromised in stomatal responses to reduced rh resulted in the identification of two genes, OST1 and ABA2, that are involved in stomatal response to low rh conditions. Interestingly both encode proteins previously known to be involved in ABA signaling (Xie et al., 2006, and references therein). These findings strongly suggested that, at least in part, the stomatal response to low rh is mediated by ABA and the intracellular ABA signaling pathway. Our most recent data show that low rh-induced stomatal closure can pro- ceed by guard cell autonomous ABA synthesis (Bauer et al., 2013),
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关 键 词: | 大气相对湿度 气孔开度 信号转导途径 ABA 弗朗西斯 气孔反应 湿度条件 参考文献 |
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