OsSERK1 regulates rice development but not immunity to Xanthomonas oryzae pv. oryzae or Magnaporthe oryzae. Issue 12 (16th November 2014)

• Record Type: Journal Article
• Authors: Zuo, Shimin; Zhou, Xiaogang; Chen, Mawsheng; Zhang, Shilu; Schwessinger, Benjamin; Ruan, Deling; Yuan, Can; Wang, Jing; Chen, Xuewei; Ronald, Pamela C.
• Is Part Of: Journal of integrative plant biology. Volume 56:Issue 12(2014)
• Page Start: 1179
• Page End: 1192
• Publication Date: 2014-11-16
• Subjects: Plants -- Periodicals; Plants -- China -- Periodicals; Electronic journals; 580.5
• DOI: 10.1111/jipb.12290
• Languages: English
• ISSNs: 1672-9072

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <sec id="jipb12290-sec-0001" sec-type="section"> <p>Somatic embryogenesis receptor kinase (SERK) proteins play pivotal roles in regulation of plant development and immunity. The rice genome contains two SERK genes, <italic>OsSerk1</italic> and <italic>OsSerk2</italic>. We previously demonstrated that <italic>OsSerk2</italic> is required for rice <italic>Xa21</italic>‐mediated resistance to <italic>Xanthomonas oryzae</italic> pv. <italic>oryzae</italic> (<italic>Xoo</italic>) and for normal development. Here we report the molecular characterization of <italic>OsSerk1</italic>. Overexpression of <italic>OsSerk1</italic> results in a semi‐dwarf phenotype whereas silencing of <italic>OsSerk1</italic> results in a reduced angle of the lamina joint. <italic>OsSerk1</italic> is not required for rice resistance to <italic>Xoo</italic> or <italic>Magnaporthe oryzae</italic>. Overexpression of <italic>OsSerk1</italic> in <italic>OsSerk2</italic>‐silenced lines complements phenotypes associated with brassinosteroid (BR) signaling defects, but not the disease resistance phenotype mediated by <italic>Xa21</italic>. In yeast, OsSERK1 interacts with itself forming homodimers, and also interacts with the kinase domains of OsSERK2 and BRI1, respectively. OsSERK1 is a functional protein kinase capable of auto‐phosphorylation <italic>in vitro</italic>. We conclude that, whereas OsSERK2 regulates both rice development and immunity, OsSERK1 functions in rice development but not immunity to <italic>Xoo</italic> and <italic>M. oryzae</italic>.</p> </sec> </abstract>