Volatile compound-mediated plant–plant interactions under stress with the tea plant as a model

Abstract

Plants respond to environmental stimuli via the release of volatile organic compounds (VOCs), and neighboring plants constantly monitor and respond to these VOCs with great sensitivity and discrimination. This sensing can trigger increased plant fitness and reduce future plant damage through the priming of their own defenses. The defense mechanism in neighboring plants can either be induced by activation of the regulatory or transcriptional machinery, or it can be delayed by the absorption and storage of VOCs for the generation of an appropriate response later. Despite much research, many key questions remain on the role of VOCs in interplant communication and plant fitness. Here we review recent research on the VOCs induced by biotic (i.e. insects and pathogens) and abiotic (i.e. cold, drought, and salt) stresses, and elucidate the biosynthesis of stress-induced VOCs in tea plants. Our focus is on the role of stress-induced VOCs in complex ecological environments. Particularly, the roles of VOCs under abiotic stress are highlighted. Finally, we discuss pertinent questions and future research directions for advancing our understanding of plant interactions via VOCs.

Acknowledgements

This study was financially supported by the National Key Research and Development Program of China (2022YFF1003103), the National Natural Science Foundation of China (U22A20499 and 32022076), the Deutsche Forschungsgemeinschaft (DFG SCHW 634/34-1), and the China Postdoctoral Science Foundation 2022 M720193.

Author contributions

J.J. and C.S. designed the review. J.J. wrote the first draft. M.Y.Z., M.T.Z, T.J., M.L., G.Y., J.W., D.G., and Y.P. contributed to different parts of the review, T.D.H. and W.S. contributed to the revision and improvement of the text.

Data availability

All relevant data can be found within the paper.

Conflict of interest

The authors declare that they have no conflict of interest.

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