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Fusicoccin, 14-3-3 Proteins, and Defense Responses in Tomato Plants
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Fusicoccin, 14-3-3 Proteins, and Defense Responses in Tomato Plants
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Journal Article
Fusicoccin, 14-3-3 Proteins, and Defense Responses in Tomato Plants
1999
Overview
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 different expression patterns in leaves after challenges. Different specific subsets of 14-3-3 genes were induced after treatment with FC and during a gene-for-gene resistance response. Possible roles for the H+-ATPase and 14-3-3 proteins in responses to pathogens are discussed.
Publisher
American Society of Plant Physiologists,American Society of Plant Biologists
Subject
/ Biological and medical sciences
/ Cell Biology and Signal Transduction
/ Fundamental and applied biological sciences. Psychology
/ Gene Expression - drug effects
/ Genes
/ genetics
/ Humans
/ Leaves
/ pathogenesis-related proteins
/ Pathology, epidemiology, host-fungus relationships. Damages, economic importance
/ Phytopathology. Animal pests. Plant and forest protection
/ Proteins
/ Sequence Homology, Amino Acid
/ Solanum lycopersicum - drug effects
/ Solanum lycopersicum - genetics
/ Solanum lycopersicum - metabolism
/ Solanum lycopersicum var. lycopersicum
/ Tomatoes
/ Toxins
