Tobacco MAP Kinase: A Possible Mediator in Wound Signal Transduction Pathways
- 22 December 1995
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 270 (5244), 1988-1992
- https://doi.org/10.1126/science.270.5244.1988
Abstract
A complementary DNA encoding a mitogen-activated protein (MAP) kinase homolog has been isolated from tobacco plants. Transcripts of the corresponding gene were not observed in healthy tobacco leaves but began to accumulate 1 minute after mechanical wounding. In tobacco plants transformed with the cloned complementary DNA, trans inactivation of the endogenous homologous gene occurred, and both production of wound-induced jasmonic acid and accumulation of wound-inducible gene transcripts were inhibited. In contrast, the levels of salicylic acid and transcripts for pathogen-inducible, acidic pathogenesis-related proteins were increased upon wounding. These results indicate that this MAP kinase is part of the initial response of higher plants to mechanical wounding.Keywords
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