Arabidopsis CK2 family gene CKB3 involved in abscisic acid signaling

C Yuan,W Xiao,J Han,H Chang

doi:10.1590/1519-6984.225345

C Yuan, W Xiao + Show 2 more

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https://doi.org/10.1590/1519-6984.225345

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Abstract

CKB3 is a regulatory (beta) subunit of CK2. In this study Arabidopsis thaliana homozygous T-DNA mutant ckb3 was studied to understand the role of CKB3 in abscisic acid (ABA) signaling. The results shown: CKB3 was expressed in all organs and the highest expression in the seeds, followed by the root. During seed germination and root growth the ckb3 mutant showed reduced sensitivity to ABA. The ckb3 mutant had more stomatal opening and increased proline accumulation and leaf water loss. The expression levels of number of genes in the ABA regulatory network had changed. This study demonstrates that CKB3 is an ABA signaling-related gene and may play a positive role in ABA signaling.

Highlights

Plants are protected by the expression of various stress-related genes to synthesize hormones and regulatory plant growth and development as well as mediators of environmental stress responses (Sreenivasulu et al, 2012; Gnutt et al, 2017)
In this study to understand the role of CKB3 in abiotic stress signaling Arabidopsis thaliana homozygous T-DNA mutant ckb3 was used
A previous have shown that several CK family genes are involved in the abscisic acid (ABA) signaling pathway, such as that three nuclear-located Casein kinase 2 (CK2) α-subunits (CKA1-3) in Arabidopsis have a synergistic role in ABA-induced blockage (Mulekar et al, 2012)

Summary

Introduction

Plants are protected by the expression of various stress-related genes to synthesize hormones and regulatory plant growth and development as well as mediators of environmental stress responses (Sreenivasulu et al, 2012; Gnutt et al, 2017). Among various phytohormones abscisic acid (ABA) is the major hormone which is the central regulator of abiotic stress resistance in plants and coordinates an array of functions (Finkelstein, 2013; Wani and Kumar, 2015), enabling plants to cope with different stresses. A previous study shown that ABA acts as a stress signal in plants and plays an important role in modulating plant response to various biotic and abiotic stresses including cold drought salinity stress and so on (Ma et al, 2019; Wang et al, 2019). Genetic and chemical studies exemplifying ABA in regulating seed maturation and dormancy are important as they have showed that a. According to reports CK2 is involved in various stress responses including heat, UV, drought, hormone

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