The roles of ABA in plant–pathogen interactions |
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Authors: | Feng Yi Cao Keiko Yoshioka Darrell Desveaux |
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Institution: | (1) Department of Cell and Systems Biology, University of Toronto, 25 Willcocks St, Toronto, ON, M5S 3B2, Canada;(2) Centre for the Analysis of Genome Evolution and Function, University of Toronto, Toronto, Canada; |
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Abstract: | Defence against abiotic and biotic stresses is crucial for the fitness and survival of plants under adverse or suboptimal
growth conditions. The phytohormone abscisic acid (ABA) is not only important for mediating abiotic stress responses, but
also plays a multifaceted and pivotal role in plant immunity. This review presents examples demonstrating the importance of
crosstalk between ABA and the key biotic stress phytohormone salicylic acid in determining the outcome of plant–pathogen interactions.
We then provide an overview of how ABA influences plant defence responses against various phytopathogens with particular emphasis
on the Arabidopsis–Pseudomonas syringae model pathosystem. Lastly, we discuss future directions for studies of ABA in plant immunity with emphasis on, its role in
the crosstalk between biotic and abiotic stress responses, the importance of distinguishing direct and indirect effects of
ABA, as well as the prospect of utilizing the recently elucidated core ABA signaling network to gain further insights into
the roles of ABA in plant immunity. |
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Keywords: | |
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