Dynamic and Coordinated Expression Changes of Rice Small RNAs in Response to Xanthomonas oryzae pv. oryzae.

Abstract

Endogenous small RNAs are newly identified players in plant immune responses, yet their roles in rice (Oryza sativa) responding to pathogens are still less understood, especially for pathogens that can cause severe yield losses. We examined the small RNA expression profiles of rice leaves at 2, 6, 12, and 24 hours post infection of Xanthomonas oryzae pv. oryzae (Xoo) virulent strain PXO99, the causal agent of rice bacterial blight disease. Dynamic expression changes of some miRNAs and trans-acting siRNAs were identified, together with a few novel miRNA targets, including an RLK gene targeted by osa-miR159a.1. Coordinated expression changes were observed among some small RNAs in response to Xoo infection, with small RNAs exhibiting the same expression pattern tended to regulate genes in the same or related signaling pathways, including auxin and GA signaling pathways, nutrition and defense-related pathways. These findings reveal the dynamic and complex roles of small RNAs in rice-Xoo interactions, and identify new targets for regulating plant responses to Xoo.

• Authors: Ying-Tao Zhao, Meng Wang, Zhi-Min Wang, Rong-Xiang Fang, Xiu-Jie Wang, Yan-Tao Jia
• Journal: Journal of genetics and genomics = Yi chuan xue bao (J Genet Genomics) Vol. 42 Issue 11 Pg. 625-637 (Nov 20 2015) ISSN: 1673-8527 [Print] China
• PMID: 26674380 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2015 Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Ltd. All rights reserved.

Chemical References

• MicroRNAs
• Plant Proteins
• RNA, Plant

Topics

• Gene Expression Regulation, Plant
• MicroRNAs (genetics, metabolism)
• Oryza (genetics, metabolism, microbiology)
• Plant Diseases (genetics, microbiology)
• Plant Proteins (genetics, metabolism)
• RNA, Plant (genetics, metabolism)
• Xanthomonas (physiology)