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Article: Fusicoccin, 14-3-3 proteins, and defense responses in tomato plants
- Article from:
- Plant Physiology
- Article date:
- April 1, 1999
- Author:
CopyrightCopyright American Society of Plant Physiologists Apr 1999. Provided by ProQuest LLC. (Hide copyright information)
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Fusicoccin, 14-3-3 Proteins, and Defense Responses in Tomato Plants1
Fusicoccin (FC) is a fungal toxin that activates the plant plasma membrane H+-ATPase by binding with 14-3-3 proteins, causing membrane hyperpolarization. Here we report on the effect of FC on a gene-for-gene pathogen-resistance response and show that FC application induces the expression of several genes involved in plant responses to pathogens. Ten members of the FC-binding 14-3-3 protein gene family were isolated from tomato (Lycopersicon esculentum) to characterize their role in defense responses. Sequence analysis is suggestive of common biochemical functions for these tomato 14-3-3 proteins, but their genes showed ...