期刊
FRONTIERS IN MICROBIOLOGY
卷 11, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2020.579504
关键词
bacterial blight of rice; single molecule real-time sequencing; transcription activator-like effectors; susceptibility genes; SWEET genes
类别
资金
- Indian Council of Agricultural Research-Networking Project on Transgenic Crops and Department of Biotechnology [BT/CEIB/12/1/01]
- U.S. National Science Foundation [1444511]
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1444511] Funding Source: National Science Foundation
The rice bacterial blight pathogen Xanthomonas oryzae pv. oryzae (Xoo) constrains production in major rice growing countries of Asia. Xoo injects transcription activator-like effectors (TALEs) that bind to and activate host susceptibility (S) genes that are important for disease. The bacterial blight resistance gene xa5, which reduces TALE activity generally, has been widely deployed. However, strains defeating xa5 have been reported in India and recently also in Thailand. We completely sequenced and compared the genomes of one such strain from each country and examined the encoded TALEs. The two genomes are nearly identical, including the TALE genes, and belong to a previously identified, highly clonal lineage. Each strain harbors a TALE known to activate the major S gene SWEET11 strongly enough to be effective even when diminished by xa5. The findings suggest international migration of the xa5-compatible pathotype and highlight the utility of whole genome sequencing and TALE analysis for understanding and responding to breakdown of resistance.
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