Genomics, expression, and function analyses of XB3 family genes in cotton

Genomics. 2021 Jan;113(1 Pt 1):245-256. doi: 10.1016/j.ygeno.2020.12.022. Epub 2020 Dec 16.

Abstract

XANTHOMONAS RESISTANCE 21-binding protein3 (XB3) is the first characterized XA21 interacting protein required for plant immunity. We isolated GhXB32A that is similar to XBAT32 and was induced during inoculation of Verticillium dahliae in cotton. 32 putative XB3 family genes were identified in G. hirsutum, G. arboreum, and G. raimondii. Cis-Acting elements related to growth, stresses, and phytohormone were detected in the promoter regions. GhXB3s were ubiquitously expressed in different cotton tissues with different patterns. Most GhXB3s were down-regulated by cold stress, but up-regulated by heat, salt, PEG, V. dahliae, ethylene, and some were up-regulated by SA or MeJA. Silencing GhXB32A and GhXB32D greatly improved resistance to Verticillium wilt, while silencing GhXB35A(D) or GhXB37A(D) made them more susceptible to V. dahliae. The interacting proteins of GhXB32A and GhXB32D were functionally enriched in response to abiotic and/or biotic stresses, and photosynthesis. XB3 family genes are potential stress resistance genes for cotton improvement.

Keywords: Cotton; Gene expression; Stress; Virus-induced gene silencing; XB3 gene family.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ascomycota / pathogenicity
  • Disease Resistance
  • Gene Expression Regulation, Plant
  • Gossypium / genetics*
  • Gossypium / metabolism
  • Gossypium / microbiology
  • Multigene Family
  • Plant Proteins / genetics*
  • Plant Proteins / metabolism
  • Stress, Physiological
  • Ubiquitin-Protein Ligases / genetics*
  • Ubiquitin-Protein Ligases / metabolism

Substances

  • Plant Proteins
  • Ubiquitin-Protein Ligases

Supplementary concepts

  • Verticillium dahliae