RT Journal Article
SR Electronic
T1 Salicylic Acid: A Likely Endogenous Signal in the Resistance Response of Tobacco to Viral Infection
JF Science
JO Science
FD American Association for the Advancement of Science
SP 1002
OP 1004
DO 10.1126/science.250.4983.1002
VO 250
IS 4983
A1 Malamy, Jocelyn
A1 Carr, John P.
A1 Klessig, Daniel F.
A1 Raskin, Ilya
YR 1990
UL http://science.sciencemag.org/content/250/4983/1002.abstract
AB Some cultivars of tobacco are resistant to tobacco mosaic virus (TMV) and synthesize pathogenesis-related (PR) proteins upon infection. In a search for the signal or signals that induce resistance or PR genes, it was found that the endogenous salicylic acid levels in resistant, but not susceptible, cultivars increased at least 20-fold in infected leaves and 5-fold in uninfected leaves after TMV inoculation. Induction of PRl genes paralleled the rise in salicylic acid levels. Since earlier work has demonstrated that treatment with exogenous salicylic acid induces PR genes and resistance, these findings suggest that salicylic acid functions as the natural transduction signal.