Omics of Root-to-Shoot Signaling Under Salt Stress and Water Deficit
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Other documents of the author: Pérez Alfocea, Francisco; Ghanem, Michael Edmond; Gomez-Cadenas, Aurelio; Dodd, Ian Charles
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Title
Omics of Root-to-Shoot Signaling Under Salt Stress and Water DeficitAuthor (s)
Date
2011Publisher
Mary Ann LiebertISSN
1536-2310Bibliographic citation
OMICS A Journal of Integrative Biology (2011), 15, 12, p. 893-901Type
info:eu-repo/semantics/articlePublisher version
http://online.liebertpub.com/doi/abs/10.1089/omi.2011.0092Abstract
Maximizing crop yield depends on the leaves receiving an optimal supply of water, mineral nutrients, small
organic molecules, proteins, and hormones from the root system via the xylem. Soil drying and salinization ... [+]
Maximizing crop yield depends on the leaves receiving an optimal supply of water, mineral nutrients, small
organic molecules, proteins, and hormones from the root system via the xylem. Soil drying and salinization alter
these xylem fluxes, and modern omics techniques offer unparalleled opportunities to understand the complexity
of these responses. Although absolute xylem concentrations of any constituent depend on the genotype and
xylem sap sampling methodology, analysis of the relative changes in concentrations has revealed some conserved
behavior. Typically, these stresses increase xylem concentrations of the plant hormone abscisic acid
(ABA) that limits crop water loss, but decrease the concentrations of certain cytokinins that stimulate expansive
growth and prevent premature leaf senescence. Further understanding of the ionic and biophysical alterations in
the rhizosphere environment that cause increased xylem concentrations of the ethylene precursor (ACC) is
needed. Interactions of these plant hormones with plant nutrient status and xylem nutrient delivery may be
important in tuning plant responses to their environment. Xylem proteomics is an emerging area that will help
understand mechanisms of plant stress adaptation. Using omics techniques to underpin rootstock-mediate plant
improvement is likely to improve crop yields in dry or saline soil. [-]
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(c) Mary Ann Liebert, Inc.
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