Overexpression of OsHSP18.0-CI Enhances Resistance to Bacterial Leaf Streak in Rice

Overview

Journal Rice (N Y)

Date 2017 Apr 19

PMID 28417425

Citations 24

Authors

Yanhu Ju

Hongjuan Tian

Ruihua Zhang

Liping Zuo

Guixiu Jin

Qian Xu

Xinhua Ding

Xiangkui Li

Zhaohui Chu

Affiliations

Soon will be listed here.

Abstract

Background: The small heat shock proteins represent a large family of proteins that respond to a wide range of abiotic and biotic stresses. OsHsp18.0-CI confers tolerance to salt and cadmium and interacts with viral RNA-dependent RNA polymerase (RdRp). However, the direct function of OsHsp18.0-CI in resistance against biotic stresses remains unclear in rice.

Results: Here, we report that the expression of OsHsp18.0-CI was up-regulated upon inoculation with RS105, a strain of Xanthomonas oryzae pv. oryzicola (Xoc) that causes bacterial leaf streak in rice. In comparison with wild-type, OsHsp18.0-CI overexpression (OE) lines exhibited enhanced resistance to RS105, whereas repression lines exhibited compromised resistance to RS105. In addition, the transcriptional profiles of wild type and OE lines were compared with and without inoculation with RS105. After inoculation with RS105, most of the genes with up-regulated expression were commonly stimulated in the wild type and OE lines, with stronger induction in the OE lines than in wild type.

Conclusion: Our study reveals that OsHsp18.0-CI positively regulates resistance to Xoc by mediating an enhanced version of the basal defense response in rice.

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