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Front Plant Sci. 2015 May 19;6:334. doi: 10.3389/fpls.2015.00334. eCollection 2015.

The guard cell metabolome: functions in stomatal movement and global food security.

Author information

1
Department of Biology, Genetics Institute, Plant Molecular and Cellular Biology Program, University of Florida , Gainesville, FL, USA.
2
Department of Biology, Pennsylvania State University , PA, USA.
3
Department of Vegetable Research, Institute of Plant Sciences, Agricultural Research Organization , Bet-Dagan, Israel.
4
Department of Biology, Genetics Institute, Plant Molecular and Cellular Biology Program, University of Florida , Gainesville, FL, USA ; Interdisciplinary Center for Biotechnology Research, University of Florida , Gainesville, FL, USA.

Abstract

Guard cells represent a unique single cell-type system for the study of cellular responses to abiotic and biotic perturbations that affect stomatal movement. Decades of effort through both classical physiological and functional genomics approaches have generated an enormous amount of information on the roles of individual metabolites in stomatal guard cell function and physiology. Recent application of metabolomics methods has produced a substantial amount of new information on metabolome control of stomatal movement. In conjunction with other "omics" approaches, the knowledge-base is growing to reach a systems-level description of this single cell-type. Here we summarize current knowledge of the guard cell metabolome and highlight critical metabolites that bear significant impact on future engineering and breeding efforts to generate plants/crops that are resistant to environmental challenges and produce high yield and quality products for food and energy security.

KEYWORDS:

abscisic acid; food security; lipids; phytohormones; primary metabolites; specialized metabolites; stomata

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