Open Access

ARTICLE

A Brachypodium distachyon calcineurin B-like protein-interacting protein kinase, BdCIPK26, enhances plant adaption to drought and high salinity stress

QINGCHEN LUO^1,#,*, JIALU FENG^2,#, XIUQI DENG¹

1 Hubei Key Laboratory of Purification and Application of Plant Anti-Cancer Active Ingredients, Department of Chemistry and Life Science, Hubei University of Education, Wuhan, China
2 School of Medicine, Wuhan University of Science and Technology, Wuhan, China

* Corresponding Author: QINGCHEN LUO. Email:
# These authors contributed equally to this work

BIOCELL 2023, 47(5), 1145-1158. https://doi.org/10.32604/biocell.2023.027847

Received 17 November 2022; Accepted 16 January 2023; Issue published 10 April 2023

Abstract

As sessile organisms, plants possess a complex system to cope with environmental changes. Ca²⁺ functions as a vital second messenger in the stress signaling of plants, and the CBL-interacting protein kinases (CIPKs) serve as essential elements in the plant Ca²⁺ signaling pathway. In this study, calcineurin B-like protein-interacting protein kinase 26 (BdCIPK26) from Brachypodium distachyon was characterized. Overexpression of BdCIPK26 enhanced tolerance to drought and salt stress of transgenic plants. Further investigations revealed that BdCIPK26 participated in abscisic acid (ABA) signaling, conferred hypersensitivity to exogenous ABA in transgenic plants, and promoted endogenous ABA biosynthesis. Moreover, BdCIPK26 was found to maintain ROS homeostasis in plants under stress conditions. Therefore, this study indicates that BdCIPK26 functions as a positive regulator in drought and salt stress response.

---

Keywords

---