Genome-Wide analysis of chitinase gene family in rice and arabidopsis reveal their mechanisms and diverse roles in defense response

Zheng Wang, Bing Xu Wang, Feng Yun Zhao, Jun Cao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Members of plant chitinase (CHI) gene family are widely implicated in defense response. For rice (Oryza sativa L.), the important monocotyledonous model plant, a genome-wide overview of the CHI family members is not yet available. Here, 48 O. sativa CHIs (OsCHIs) were identified from rice genome. Then phylogenetic analysis of these OsCHIs as well as CHIs (AtCHIs) of Arabidopsis thaliana, the important dicotyledonous model plant, revealed eight distinct groups as strongly supported by exon/intron structure and motif organization. Further, it was revealed that expansion of CHI family has occurred largely via tandem duplication, while segmental duplication has a very limited role. Furthermore, analysis of oligonucleotide array data gained insights into diverse roles of CHI genes under various biotic stress conditions. Many OsCHIs were found to significantly respond to a parasite plant Striga hermonthica, suggested the new role of these OsCHIs in response to this stress. Most AtCHIs in the Group 7 and 8 were clearly up-regulated in response to three types of pathogens, indicating the function of the two groups in defense. This study provides comprehensive analysis on CHI gene family in rice and Arabidopsis, and potential candidates were indicated for improving resistance in plants through transgenic approach.

Original languageEnglish
Pages (from-to)812-822
Number of pages11
JournalInternational Journal of Agriculture and Biology
Volume24
Issue number4
DOIs
StatePublished - 2020
Externally publishedYes

Keywords

  • Gene duplication
  • Gene expression
  • Parasite plants
  • Pathogens
  • Plant chitinase

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