Characterisation of the HbSnRK2 gene family members and revealing specific HbSnRK2.2 functions in the stress resistance of the rubber tree

Yu Zhang, Mingyang Liu, Dong Zhang, Meng Wang and Lifeng Wang
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Yu Zhang: Sanya Nanfan Research Institute, Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests; Ministry of Education of PRC; School of Plant Protection, Hainan University, Haikou, P.R. China
Mingyang Liu: Sanya Nanfan Research Institute, Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests; Ministry of Education of PRC; School of Plant Protection, Hainan University, Haikou, P.R. China
Dong Zhang: Sanya Nanfan Research Institute, Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests; Ministry of Education of PRC; School of Plant Protection, Hainan University, Haikou, P.R. China

Plant Protection Science, 2023, vol. 59, issue 1, 59-72

Abstract: SNF1-related protein kinase (SnRK2) is a critical positive regulatory factor in the abscisic acid (ABA) signalling pathway. However, the roles of the HbSnRK2 gene family members in the rubber tree, especially in response to stress, have not been thoroughly characterised. Here, we cloned six HbSnRK2 genes from the rubber tree. Based on the phylogenetic analysis, the HbSnRK2 family genes were divided into three groups. The motifs and intron numbers of HbSnRK2 were conserved. Analysis of cis-regulatory element sequences of all HbSnRK2 genes identified ABRE and TC-rich elements in the prompter of all the HbSnRK2 genes, illustrating that HbSnRK2 could be adjusted by the ABA and stress responsiveness. The qRT-PCR analysis showed that the expression patterns of the six HbSnRK2 genes differed in different tissues. The expression of these genes also differed under treatment with the plant hormone ABA, the HbSnRK2.2 gene was especially significantly expressed under the ABA treatment. Moreover, the HbSnRK2.2 gene responded to glyphosate, powdery mildew, heat stress and cold stress processes, which indicates that the HbSnRK2.2 gene plays an important role in phytohormone signalling and stress response in rubber trees. Taken together, the study provides valuable information to further define the role of the HbSnRK2 gene in rubber trees.

Keywords: SnRK2; Hevea brasiliensis Müll. Arg.; phytohormone; signal pathway (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpps:v:59:y:2023:i:1:id:48-2022-pps

DOI: 10.17221/48/2022-PPS

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