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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (3): 495-507.doi: 10.16420/j.issn.0513-353x.2021-1282

• Research Papers • Previous Articles     Next Articles

Expression Analysis of CsMYB41 and CsMYB63 Genes in Response to Citrus Canker

LIU Yunuo*, CAO Ya*, WANG Shuai, DU Meixia, ZHENG Lin, CHEN Shanchun, ZOU Xiuping**()   

  1. Citrus Research Institute,Southwest University/Chinese Academy of Agricultural Sciences,Chongqing 400712,China
  • Received:2022-08-23 Revised:2022-12-21 Online:2023-03-25 Published:2023-04-03
  • Contact: **(E-mail:zouxiuping@cric.cn

Abstract:

MYB transcription factors not only play a pivotal role in plant growth and development,but also have an important regulatory function in plant disease resistance. In this study,based on the previously constructed transcriptome database of highly susceptible Newhall Navel Orange(Citrus sinensis Osbeck)and highly resistant Calamondin(C. madurensis)in response to citrus canker,two MYB genes CsMYB41(Cs1g06220)and CsMYB63(Cs4g12760)were cloned from Newhall Navel Orange. The full length of the cDNA of CsMYB41 and CsMYB63 were 1 304 and 1 398 bp,which had 1 047 and 1 170 bp reading frames(ORF),respectively. Protein sequences alignment analysis showed that CsMYB41 and CsMYB63 belonged to the R2R3-MYB subfamily of the MYB transcription factor family. Phylogenetic tree analysis showed that CsMYB41 and CsMYB63 were highly homologous with cocoa MYB41 and castor MYB63,respectively. Subcellular location analysis displayed that both CsMYB41 and CsMYB63 proteins located in nucleus. qRT-PCR analysis showed that both CsMYB41 and CsMYB63 genes were significantly up-regulated by Xanthomonas citri subsp. citri. Hormone induction experiments demonstrated that CsMYB41 was significantly up-regulated by SA and ABA,and CsMYB63 was significantly up-regulated by SA,JA and ABA in Newhall Navel Orange. In Calamondin,CsMYB41 expression was increased by SA,and CsMYB63 expression was hardly affected by hormone treatment. The above results indicate that the two MYB genes may play an important role in response to citrus canker.

Key words: citrus, citrus canker, MYB transcription factor, qRT-PCR

CLC Number: