High humidity induces abscisic acid 8'-hydroxylase in stomata and vasculature to regulate local and systemic abscisic acid responses in Arabidopsis.

@article{Okamoto2009HighHI,
  title={High humidity induces abscisic acid 8'-hydroxylase in stomata and vasculature to regulate local and systemic abscisic acid responses in Arabidopsis.},
  author={Masanori Okamoto and Yoko Tanaka and Suzanne R. Abrams and Yuji Kamiya and Motoaki Seki and Eiji Nambara},
  journal={Plant physiology},
  year={2009},
  volume={149 2},
  pages={825-34}
}
Levels of endogenous abscisic acid (ABA) are changed dynamically in response to environmental conditions. The ABA 8'-hydroxylase is a key enzyme in ABA catabolism and is encoded by CYP707A genes. In this study, we examined physiological roles of Arabidopsis (Arabidopsis thaliana) CYP707As in the plant's response to changes in humidity. The cyp707a1 and cyp707a3 mutants displayed lower stomatal conductance under turgid conditions (relative humidity 60%) than the wild type. When wild-type plants… CONTINUE READING
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