Sending a Canopy-wide Message in Plants

Although not all leaves in the canopy of a plant may be exposed to light at the same time, it is beneficial to coordinate the closure of the pores (stomata) in the leaves to prevent desiccation. Devireddy et al. showed in Arabidopsis thaliana plants that a wave of reactive oxygen species and Ca2+ enabled leaves experiencing light stress to trigger stomatal closure in leaves not exposed to light. Stomatal closure required abscisic acid in light-stressed leaves and jasmonic acid in nonexposed leaves. This coordinated and dynamic response may enable plants to acclimate to light stress.

[Professor Eduardo Blumwald, Dept. of Plant Sciences, UC Davis, is a co-author on this publication.]

The closing of leaf stomata can be coordinated from leaf to leaf. (photo: Dennis Kunkel Microscopy / Science Source)

This summary is from Sci. Signal. 11, eaam9514 (2018), edited by Stella Hurtley
http://science.sciencemag.org/content/359/6378/880.1

Read the full report:

Coordinating the overall stomatal response of plants: Rapid leaf-to-leaf communication during light stress. Amith R. Devireddy, Sara I. Zandalinas, Aurelio Gómez-Cadenas, Eduardo Blumwald, Ron Mittler

http://stke.sciencemag.org/content/sigtrans/11/518/eaam9514.full.pdf

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