Chinese Bulletin of Botany ›› 2022, Vol. 57 ›› Issue (5): 684-696.DOI: 10.11983/CBB22006

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Research Progress on the Regulatory Mechanisms of ABA Signal Transduction in Guard Cells

Zhou Yuping*(), Yan Jiahao, Tian Chang’en   

  1. Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design, School of Life Sciences, Guangzhou University, Guangzhou 510006, China
  • Received:2022-01-07 Accepted:2022-05-12 Online:2022-09-01 Published:2022-09-09
  • Contact: Zhou Yuping
  • About author:*E-mail:

Abstract: ABA plays important roles in regulating the rapid responses of plants to stresses. The ABA core signal pathway consists of ABA receptors PYR1/PYLs/RCARs, clade A protein phosphatases PP2Cs and protein kinases SnRK2s in plant cells. Reactive oxygen species (ROS) and Ca2+ are the vital second messengers in guard cells that involved in the stomatal closure controlled by ABA. In this review, we focus on summarizing the latest research progresses on the regulations of core ABA signaling proteins in guard cells, ROS- and Ca2+-mediated guard cell ABA signal transductions, and attempt to elucidate the mechanisms of ABA signal transduction in guard cells.

Key words: abscisic acid, reactive oxygen species, calcium signal, stomatal regulation