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Acta Physiologiae Plantarum

, Volume 36, Issue 2, pp 273–282 | Cite as

OsCPK20 positively regulates Arabidopsis resistance against Pseudomonas syringae pv. tomato and rice resistance against Magnaporthe grisea

  • Liwen Fu
  • Xiangchun Yu
  • Chengcai AnEmail author
Original Paper

Abstract

Calcium-dependent protein kinases are important decoders of calcium signals in plants, which are involved in plant immunity. We report isolation and functional characterization of a pathogen-responsive OsCPK20 gene in rice. The expression of OsCPK20 in rice was significantly induced following treatment with a Magnaporthe grisea elicitor. Overexpression of constitutively active OsCPK20 in Arabidopsis enhanced the resistance to infection with Pseudomonas syringae pv. tomato, associated with elevated expression of both SA- and JA-related defense genes. Similarly, transgenic rice plants containing constitutively active OsCPK20 exhibited enhanced resistance to blast fungus M. grisea. The enhanced resistance in the transgenic Arabidopsis and rice was associated with activated expression of both SA- and JA-related defense genes. We also found that OsCPK20 was significantly induced by drought stress, indicating that OsCPK20 might be involved in plant response to drought stress. Taken together, our results indicate that rice OsCPK20 positively regulates Arabidopsis resistance against Pseudomonas syringae pv. tomato and rice resistance against M. grisea, and that it may enhance disease resistance by activating both SA- and JA-dependent defense responses.

Keywords

CDPK Plant immunity Salicylic acid Jasmonic acid 

Notes

Acknowledgments

We thank Dr. Shanping He for technical assistance. Also, we thank Prof. Youliang Peng and Prof. Zejian Guo (China Agricultural University) for rice seeds and M. grisea isolate 12-DG2X-32-1. This work was supported by grants from the National Key Basic Science “973” Program (Grant No. 2012CB114006) and the National Natural Science Foundation (Grant Nos. 31272023 and 31101421).

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2013

Authors and Affiliations

  1. 1.State Key Laboratory of Protein and Plant Gene Research, College of Life SciencesPeking UniversityBeijingChina

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