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Light Dominates the Diurnal Emissions of Herbivore-induced Volatiles in Wild Tobacco by He, Jun (author);Halitschke, Rayko (author);Schuman, Meredith C. (author);Baldwin, Ian T. (author) is a Agricultural and Biological Sciences article available to read on EtoBox.

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## Abstract ## Background Timing is everything when it comes to the fitness outcome of a plant’s ecological interactions, and accurate timing is particularly relevant for interactions with herbivores or mutualists that are based on ephemeral emissions of volatile organic compounds. Previous studies of the wild tobacco N. attenuata have found associations between the diurnal timing of volatile emissions, and daytime predation of herbivores by their natural enemies. ## Results Here, we investigated the role of light in regulating two biosynthetic groups of volatiles, terpenoids and green leaf volatiles (GLVs), which dominate the herbivore-induced bouquet of N. attenuata. Light deprivation strongly suppressed terpenoid emissions while enhancing GLV emissions, albeit with a time lag. Silencing the expression of photoreceptor genes did not alter terpenoid emission rhythms, but silencing expression of the phytochrome gene, NaPhyB1, disordered the emission of the GLV (Z)-3-hexenyl acetate. External abscisic acid (ABA) treatments increased stomatal resistance, but did not truncate the emission of terpenoid volatiles (recovered in the headspace). However, ABA treatment enhanced GLV emission

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Author

He, Jun (author);Halitschke, Rayko (author);Schuman, Meredith C. (author);Baldwin, Ian T. (author)

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)