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Annals of Botany 81: 779-781, 1998
© 1998 Annals of Botany Company

COMMUNICATION

The Angiospermous Root ParasiteOrobancheL. (Orobanchaceae) Induces Expression of a Pathogenesis Related (PR) Gene in Susceptible Tobacco Roots

DANIEL M. JOEL+, and VITALY H. PORTNOY

Department of Weed Research, Agricultural Research Organization, Newe-Ya'ar Research Center, P.O. Box 1021, Ramat-Yishay, 30095, Israel

January 19, 1998 ; February 22, 1998 . March 15, 1998 .

ABSTRACT

Parasitic plants develop a haustorium that intrudes host tissues. In roots of transgenic PRb-1b-GUS tobacco the expression of the chimeric gene was prominent nearOrobancheinfection. The expression of the pathogenesis related (PR) protein gene inOrobanche-infected roots indicates thatOrobanchereleases appropriate elicitors, and that the susceptible plant does senseOrobancheinvasion. TheOrobanche-responsive promoter may be a useful tool in engineering resistances to this parasitic weed.Copyright 1998 Annals of Botany Company

Haustorium,Nicotiana tabacum, Orobanche aegyptiaca, parasitic plants, PR proteins, tobacco.


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