Chinese Bulletin of Botany ›› 2012, Vol. 47 ›› Issue (5): 474-482.DOI: 10.3724/SP.J.1259.2012.00474

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OsSRL, a Receptor-like Kinase with S-locus Site, Is Involved in Drought Tolerance in Rice

Fenglian Xu, Jiaojiao Li, Chunhui Du, Na Wang, Suqiao Zhang*   

  1. Key Laboratory of Molecular Cell Biology of Hebei Province, College of Life Science, Hebei Normal University, Shijiazhuang 050016, China
  • Received:2011-10-28 Revised:2012-02-24 Online:2012-09-01 Published:2012-07-24
  • Contact: Suqiao Zhang

Abstract: Plants have developed various adaptive mechanisms to drought, salt, temperature and other stresses. Receptor-like kinases play significant roles in plant growth regulation and responses to stresses. We found that a receptor-like kinase with an S-locus domain, OsSRL, might be involved in drought stress response in rice. Downregulation of OsSRL expression by RNA interference produced enhanced drought tolerance and increased seedling survival rate, chlorophyll content and fresh weight as compared with control plants after drought stress treatment. The expression of OsSRL was induced by 30% PEG and 100 μmol·L–1 abscisic acid. Knocking down OsSRL expression enhanced the expression of drought-response genes RAB16A and LEA3. OsSRL was expressed in plumule, radicula, root, node, and flower. These data suggest that OsSRL, as a receptor kinase with an S-locus domain, may play roles in drought stress tolerance in rice.