Aquaporins facilitate hydrogen peroxide entry into guard cells to mediate ABA- and pathogen-triggered stomatal closure

Olivier Rodrigues; Ganna Reshetnyak; Alexandre Grondin; Yusuke Saijo; Nathalie Leonhardt; Christophe Maurel; Lionel Verdoucq

doi:10.1073/pnas.1704754114

August 7, 2017Proceedings of the National Academy of SciencesOpen Access

Aquaporins facilitate hydrogen peroxide entry into guard cells to mediate ABA- and pathogen-triggered stomatal closure

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Key Points

To determine whether aquaporins facilitate the transport of hydrogen peroxide into guard cells to drive abscisic acid- and pathogen-induced stomatal closure.
Assessed hydrogen peroxide transport across guard cell plasma membranes in response to abscisic acid and pathogen signals.
Examined the dependence of stomatal movement and closure kinetics on aquaporin-mediated transport mechanisms.
Aquaporins directly facilitate the influx of hydrogen peroxide across the plasma membrane into guard cells.
Intracellular entry of hydrogen peroxide via aquaporins is required for downstream signaling that drives stomatal closure during pathogen challenge and abscisic acid exposure.

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Implication

Molecular study reveals aquaporin-facilitated hydrogen peroxide transport in guard cells, indicating an essential channel for stress-induced stomatal closure.

Abstract

signaling.

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Rodrigues et al. (2017) studied this question.

synapsesocial.com/papers/6a02d2a259ea043e4c9e3088 https://doi.org/10.1073/pnas.1704754114

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Aquaporins facilitate hydrogen peroxide entry into guard cells to mediate ABA- and pathogen-triggered stomatal closure

Key Points

No abstract yet

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Implication

Abstract

Discussion

Cite This Study

Aquaporins facilitate hydrogen peroxide entry into guard cells to mediate ABA- and pathogen-triggered stomatal closure

Key Points

No abstract yet

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Implication

Abstract

Discussion

Cite This Study

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