Two calcium-dependent protein kinases, CPK4 and CPK11, regulate abscisic acid signal transduction in Arabidopsis.

@article{Zhu2007TwoCP,
  title={Two calcium-dependent protein kinases, CPK4 and CPK11, regulate abscisic acid signal transduction in Arabidopsis.},
  author={Sai-yong Zhu and Xiang-Chun Yu and Xiao-Jing Wang and Rui Zhao and Yan Li and Ren-chun Fan and Yi Shang and Shu-Yuan Du and Xiao-fang Wang and Fu-Qing Wu and Y. Xu and X. Zhang and Da-Peng Zhang},
  journal={The Plant cell},
  year={2007},
  volume={19 10},
  pages={3019-36}
}
Many biochemical approaches show functions of calcium-dependent protein kinases (CDPKs) in abscisic acid (ABA) signal transduction, but molecular genetic evidence linking defined CDPK genes with ABA-regulated biological functions at the whole-plant level has been lacking. Here, we report that ABA stimulated two homologous CDPKs in Arabidopsis thaliana, CPK4 and CPK11. Loss-of-function mutations of CPK4 and CPK11 resulted in pleiotropic ABA-insensitive phenotypes in seed germination, seedling… CONTINUE READING
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