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Ethylene limits abscisic acid- or soil drying-induced stomatal closure in aged wheat leaves

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Ethylene limits abscisic acid- or soil drying-induced stomatal closure in aged wheat leaves. / Chen, Lin; Dodd, Ian C.; Davies, William J. et al.
In: Plant, Cell and Environment, Vol. 36, No. 10, 10.2013, p. 1850-1859.

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Chen L, Dodd IC, Davies WJ, Wilkinson S. Ethylene limits abscisic acid- or soil drying-induced stomatal closure in aged wheat leaves. Plant, Cell and Environment. 2013 Oct;36(10):1850-1859. Epub 2013 Apr 18. doi: 10.1111/pce.12094

Author

Chen, Lin ; Dodd, Ian C. ; Davies, William J. et al. / Ethylene limits abscisic acid- or soil drying-induced stomatal closure in aged wheat leaves. In: Plant, Cell and Environment. 2013 ; Vol. 36, No. 10. pp. 1850-1859.

Bibtex

@article{8478da5013194406a61d3c027b020086,
title = "Ethylene limits abscisic acid- or soil drying-induced stomatal closure in aged wheat leaves",
abstract = "The mechanism of age-induced decreased stomatal sensitivity to abscisic acid (ABA) and soil drying has been explored here. Older, fully expanded leaves partly lost their ability to close stomata in response to foliar ABA sprays, and soil drying which stimulated endogenous ABA production, while young fully expanded leaves closed their stomata more fully. However, ABA- or soil drying-induced stomatal closure of older leaves was partly restored by pretreating plants with 1-methylcyclopropene (1-MCP), which can antagonize ethylene receptors, or by inoculating soil around the roots with the rhizobacterium Variovorax paradoxus5C-2, which contains 1-aminocyclopropane-1-carboxylic acid (ACC)-deaminase. ACC (the immediate biosynthetic precursor of ethylene) sprays revealed higher sensitivity of stomata to ethylene in older leaves than younger leaves, despite no differences in endogenous ACC concentrations or ethylene emission. Taken together, these results indicate that the relative insensitivity of stomatal closure to ABA and soil drying in older leaves is likely due to altered stomatal sensitivity to ethylene, rather than ethylene production. To our knowledge, this is the first study to mechanistically explain diminished stomatal responses to soil moisture deficit in older leaves, and the associated reduction in leaf water-use efficiency.",
keywords = "leaf age, rhizobacteria, senescence, stomata, VARIOVORAX-PARADOXUS 5C-2, WATER-STRESS, LEAF SENESCENCE, 1-AMINOCYCLOPROPANE-1-CARBOXYLATE DEAMINASE, ARABIDOPSIS-THALIANA, SUNFLOWER PLANTS, GROWTH-RESPONSES, ABA, TRANSPIRATION, CONDUCTANCE",
author = "Lin Chen and Dodd, {Ian C.} and Davies, {William J.} and Sally Wilkinson",
year = "2013",
month = oct,
doi = "10.1111/pce.12094",
language = "English",
volume = "36",
pages = "1850--1859",
journal = "Plant, Cell and Environment",
issn = "0140-7791",
publisher = "Wiley",
number = "10",

}

RIS

TY - JOUR

T1 - Ethylene limits abscisic acid- or soil drying-induced stomatal closure in aged wheat leaves

AU - Chen, Lin

AU - Dodd, Ian C.

AU - Davies, William J.

AU - Wilkinson, Sally

PY - 2013/10

Y1 - 2013/10

N2 - The mechanism of age-induced decreased stomatal sensitivity to abscisic acid (ABA) and soil drying has been explored here. Older, fully expanded leaves partly lost their ability to close stomata in response to foliar ABA sprays, and soil drying which stimulated endogenous ABA production, while young fully expanded leaves closed their stomata more fully. However, ABA- or soil drying-induced stomatal closure of older leaves was partly restored by pretreating plants with 1-methylcyclopropene (1-MCP), which can antagonize ethylene receptors, or by inoculating soil around the roots with the rhizobacterium Variovorax paradoxus5C-2, which contains 1-aminocyclopropane-1-carboxylic acid (ACC)-deaminase. ACC (the immediate biosynthetic precursor of ethylene) sprays revealed higher sensitivity of stomata to ethylene in older leaves than younger leaves, despite no differences in endogenous ACC concentrations or ethylene emission. Taken together, these results indicate that the relative insensitivity of stomatal closure to ABA and soil drying in older leaves is likely due to altered stomatal sensitivity to ethylene, rather than ethylene production. To our knowledge, this is the first study to mechanistically explain diminished stomatal responses to soil moisture deficit in older leaves, and the associated reduction in leaf water-use efficiency.

AB - The mechanism of age-induced decreased stomatal sensitivity to abscisic acid (ABA) and soil drying has been explored here. Older, fully expanded leaves partly lost their ability to close stomata in response to foliar ABA sprays, and soil drying which stimulated endogenous ABA production, while young fully expanded leaves closed their stomata more fully. However, ABA- or soil drying-induced stomatal closure of older leaves was partly restored by pretreating plants with 1-methylcyclopropene (1-MCP), which can antagonize ethylene receptors, or by inoculating soil around the roots with the rhizobacterium Variovorax paradoxus5C-2, which contains 1-aminocyclopropane-1-carboxylic acid (ACC)-deaminase. ACC (the immediate biosynthetic precursor of ethylene) sprays revealed higher sensitivity of stomata to ethylene in older leaves than younger leaves, despite no differences in endogenous ACC concentrations or ethylene emission. Taken together, these results indicate that the relative insensitivity of stomatal closure to ABA and soil drying in older leaves is likely due to altered stomatal sensitivity to ethylene, rather than ethylene production. To our knowledge, this is the first study to mechanistically explain diminished stomatal responses to soil moisture deficit in older leaves, and the associated reduction in leaf water-use efficiency.

KW - leaf age

KW - rhizobacteria

KW - senescence

KW - stomata

KW - VARIOVORAX-PARADOXUS 5C-2

KW - WATER-STRESS

KW - LEAF SENESCENCE

KW - 1-AMINOCYCLOPROPANE-1-CARBOXYLATE DEAMINASE

KW - ARABIDOPSIS-THALIANA

KW - SUNFLOWER PLANTS

KW - GROWTH-RESPONSES

KW - ABA

KW - TRANSPIRATION

KW - CONDUCTANCE

U2 - 10.1111/pce.12094

DO - 10.1111/pce.12094

M3 - Journal article

VL - 36

SP - 1850

EP - 1859

JO - Plant, Cell and Environment

JF - Plant, Cell and Environment

SN - 0140-7791

IS - 10

ER -