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THE PLANT CELL, Vol 4, Issue 6 645-656, Copyright © 1992 by American Society of Plant Biologists

RESEARCH ARTICLES

Acquired Resistance in Arabidopsis

S. Uknes, B. Mauch-Mani, M. Moyer, S. Potter, S. Williams, S. Dincher, D. Chandler, A. Slusarenko, E. Ward and J. Ryals
Agricultural Biotechnology Research Unit, CIBA-GEIGY Corporation, 3054 Cornwallis Road, Research Triangle Park, North Carolina 27709

Acquired resistance is an important component of the complex disease resistance mechanism in plants, which can result from either pathogen infection or treatment with synthetic, resistance-inducing compounds. In this study, Arabidopsis, a tractable genetic system, is shown to develop resistance to a bacterial and a fungal pathogen following 2,6-dichloroisonicotinic acid (INA) treatment. Three proteins that accumulated to high levels in the apoplast in response to INA treatment were purified and characterized. Expression of the genes corresponding to these proteins was induced by INA, pathogen infection, and salicylic acid, the latter being a putative endogenous signal for acquired resistance. Arabidopsis should serve as a genetic model for studies of this type of immune response in plants.




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Copyright © 1992 by the American Society of Plant Biologists