Stomata: gatekeepers of uptake and defense signaling by green leaf volatiles in maize.

Autor:	Maleki FA; Center of Chemical Ecology, Department of Entomology, The Pennsylvania State University, University Park, PA 16802, USA., Seidl-Adams I; Center of Chemical Ecology, Department of Entomology, The Pennsylvania State University, University Park, PA 16802, USA., Felton GW; Center of Chemical Ecology, Department of Entomology, The Pennsylvania State University, University Park, PA 16802, USA., Kersch-Becker MF; Center of Chemical Ecology, Department of Entomology, The Pennsylvania State University, University Park, PA 16802, USA., Tumlinson JH; Center of Chemical Ecology, Department of Entomology, The Pennsylvania State University, University Park, PA 16802, USA.
Jazyk:	angličtina
Zdroj:	Journal of experimental botany [J Exp Bot] 2024 Nov 15; Vol. 75 (21), pp. 6872-6887.
DOI:	10.1093/jxb/erae401
Abstrakt:	Plants adapt to balance growth-defense tradeoffs in response to both biotic and abiotic stresses. Green leaf volatiles (GLVs) are released after biotic and abiotic stresses and function as damage-associated signals in plants. Although, GLVs enter plants primarily through stomata, the role of stomatal regulation on the kinetics of GLV uptake remains largely unknown. Here, we illustrate the effect of stomatal closure on the timing and magnitude of GLV uptake. We closed stomata by either exposing maize (Zea mays) plants to darkness or applying abscisic acid, a phytohormone that closes the stomata in light. Then, we exposed maize seedlings to (Z)-3-hexen-1-ol and compared its dynamic uptake under different stomatal conditions. Additionally, we used (E)-3-hexen-1-ol, an isomer of (Z)-3-hexen-1-ol not made by maize, to exclude the role of internal GLVs in our assays. We demonstrate that closed stomata effectively prevent GLV entry into exposed plants, even at high concentrations. Furthermore, our findings indicate that reduced GLV uptake impairs GLV-driven induction of biosynthesis of sesquiterpenes, a group of GLV-inducible secondary metabolites, with or without herbivory. These results elucidate how stomata regulate the perception of GLV signals, thereby dramatically changing the plant responses to herbivory, particularly under water stress or dark conditions. (© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
Databáze:	MEDLINE
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