NDLI: Essential role of the small GTPase Rac in disease resistance of rice

Content Provider	PubMed Central
Author	Ono, Eiichiro Wong, Hann Ling Kawasaki, Tsutomu Hasegawa, Morifumi Kodama, Osamu Shimamoto, Ko
Copyright Year	2001
Abstract	Production of reactive oxygen intermediates (ROI) and a form of programmed cell death called hypersensitive response (HR) are often associated with disease resistance of plants. We have previously shown that the Rac homolog of rice, OsRac1, is a regulator of ROI production and cell death in rice. Here we show that the constitutively active OsRac1 (i) causes HR-like responses and greatly reduces disease lesions against a virulent race of the rice blast fungus; (ii) causes resistance against a virulent race of bacterial blight; and (iii) causes enhanced production of a phytoalexin and alters expression of defense-related genes. The dominant-negative OsRac1 suppresses elicitor-induced ROI production in transgenic cell cultures, and in plants suppresses the HR induced by the avirulent race of the fungus. Taken together, our findings strongly suggest that OsRac1 has a general role in disease resistance of rice.
Related Links	http://dx.doi.org/10.1073/pnas.98.2.759
Ending Page	764
Page Count	6
Starting Page	759
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	2
Volume Number	98
Language	English
Publisher	The National Academy of Sciences
Publisher Date	2001-01-16
Access Restriction	Open
Rights Holder	The National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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