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KMID : 0368420060490030247
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Journal of Plant Biology
2006 Volume.49 No. 3 p.247 ~ p.256
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Two novel protein kinase genes,OsMSRPK1 andOsMSURPK2, are regulated by diverse environmental stresses in rice
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Lee Mi-Ok
Choi Pil-Gyu
Kim Jung-A
Jung Young-Ho
Jung Seung-Hee
Kim So-Hee
Kim Jin-Won
Lee Sang-Kyu
Jeon Jong-Seong
Randeep Rakwal
Agrawal Ganesh Kumar
Jwa Nam-Soo
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Abstract
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Two novel rice (Oryza sativa L.) protein kinase (PK) genes have been isolated.OsMSRPK1 andOsMSURPK2, which most likely exist as single-copy genes in the rice genome, encode 693 and S03 amino acids polypeptide, respectively, and have the serine/threonine kinase domain of cyclin dependent protein kinase (OsMSRPK1), or the serine/threonine kinase domain and NAF domain (OsMSURPK2). Steady-state mRNA analyses of these PKs, with constitutive expression in the leaves of two-week-old seedlings, revealed thatOsMSRPK1 is up-regulated upon exposure to environmental stresses, whereasOsMSVRPK2 is down-regulated by these same stresses. Furthermore, the two PKs are developmentally regulated in both young and mature rice plants, including in the panicles. These results strongly suggest that the genes have roles in both plant development and in their defense/stress-signaling pathways.
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KEYWORD
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defense/stress signaling pathway, protein kinase, rice
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