The Plant Genome (Nov 2015)

Interacting Transcriptomes Revealing Molecular Mechanisms Underlying Xa39 Mediated Broad Spectrum Resistance of Rice to Bacterial Blight

  • Fan Zhang,
  • Liyu Huang,
  • Fan Zhang,
  • Dandan Hu,
  • Weijian Wu,
  • Wensheng Wang,
  • Jauhar Ali,
  • Casiana Vera Cruz,
  • Yongli Zhou,
  • Zhikang Li

DOI
https://doi.org/10.3835/plantgenome2014.12.0094
Journal volume & issue
Vol. 8, no. 3

Abstract

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Interaction between rice ( L.) and its bacterial blight (BB) pathogen pv. () is the model system between monocot plants and their bacterial pathogens. To understand the genome-wide interactions between and rice resulting from a broad-spectrum hypersensitive reaction (BSHR) mediated by a new rice resistance () gene, , comparative dynamic transcriptomic profiles in the incompatible and compatible interactions were investigated using three related rice lines and a highly virulent isolate, PXO99. Large numbers of rice and differentially expressed genes (DEGs) were identified in comparisons between the incompatible interactions and compatible ones, suggesting the gene network consisted of 27 genes in four groups of distinct functions involving leading to BSHR of rice in the sequential events from the × interaction → signal recognition and transduction → protein modification → programmed cell death. Correspondingly, several groups of genes expressed or upregulated specifically in the incompatible interaction were those for type III secretion system (T3SS) and type III secretion effectors (T3SEs). Combined evidence suggests LOC_Os11g37759, one of a two-member CC-NBS-LRR gene family on rice chromosome 11, as the most likely candidate for in rice and two genes, and involved in T3SS of , as the most likely candidate genes for the corresponding in . Our transcriptome data and identified rice and DEGs provided a valuable source of information for future investigations on the –rice interactions.