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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (1): 26-36.doi: 10.16420/j.issn.0513-353x.2020-0132

• Research Papers • Previous Articles     Next Articles

Correlation Analysis of Citrus Catalase Gene CsKat01 and Citrus Canker Disease

QI Jingjing, QIN Xiujuan, XIE Yu, CHEN Shanchun, HE Yongrui*(), LI Qiang*()   

  1. Citrus Research Institute,Southwest University/Chinese Academy of Agricultural Sciences,Chongqing 400712,China
  • Received:2020-06-05 Revised:2020-09-06 Online:2021-01-25 Published:2021-01-29
  • Contact: HE Yongrui,LI Qiang E-mail:heyongrui@cric.cn;liqiang@cric.cn

Abstract:

In order to investigate the correlation between CsKat01 and citrus bacterial canker disease (CBCD)response,bioinformatics and expression analysis of CsKat01 as well as the relationship between CAT activity and Hydrogen peroxide(H2O2)contents in CBCD susceptible variety Wanjincheng and resistant variety Calamondin were performed. Firstly,the coding sequence(CDS)of the CsKat01 gene was cloned and the structure and function of the coding protein were analyzed. The full-length CDS of CsKat01 is 1 482 bp and it encodes 493 amino acid residues with a typical catalase domain. Secondly,by cloning and analyzing the promoter sequence,we studied the promoter regulatory elements and found that the core promoters of both Wanjincheng and Calamondin contained salicylic acid(SA),jasmonic acid(JA)and abscisic acid(ABA)response elements whose numbers are different. Thirdly,qRT-PCR was used to analyze the induced expression profiles of plant hormones and Xanthomonas citri subsp. citriXcc)on CsKat01,and then the correlation between the enzyme and CBCD was determined. Finally,the relations between CsKat01,CAT activity,H2O2 content and CBCD resistance were analyzed. We speculate that CsKat01 may regulate CAT enzyme activity,which further regulates H2O2 accumulation,and then regulates CBCD resistance.

Key words: citrus, bacterial canker disease, catalase, CsKat01, hydrogen peroxide

CLC Number: