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Environmental effects on oxygen isotope enrichment of leaf water in cotton leaves.

Environmental effects on oxygen isotope enrichment of leaf water in cotton leaves. Research Abstract Details 

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  • Environmental effects on oxygen isotope enrichment of leaf water in cotton leaves. Abstract Text:

    francesco ripulloneFrancesco Ripullone,naoko matsuoNaoko Matsuo,hilary stuart-williamsHilary Stuart-Williams,suan chin wongSuan Chin Wong,marco borghettiMarco Borghetti,makoto taniMakoto Tani,graham farquharGraham Farquhar,

    The oxygen isotope enrichment of bulk leaf water (Delta(b)) was measured in cotton (Gossypium hirsutum) leaves to test the Craig-Gordon and Farquhar-Gan models under different environmental conditions. Delta(b) increased with increasing leaf-to-air vapor pressure difference (VPd) as an overall result of the responses to the ratio of ambient to intercellular vapor pressures (e(a)/e(i)) and to stomatal conductance (g(s)). The oxygen isotope enrichment of lamina water relative to source water (Delta(1)), which increased with increasing VPd, was estimated by mass balance between less enriched water in primary veins and enriched water in the leaf. The Craig-Gordon model overestimated Delta(b) (and Delta(1)), as expected. Such discrepancies increased with increase in transpiration rate (E), supporting the Farquhar-Gan model, which gave reasonable predictions of Delta(b) and Delta(1) with an L of 7.9 mm, much less than the total radial effective length L(r) of 43 mm. The fitted values of L for Delta(1) of individual leaves showed little dependence on VPd and temperature, supporting the assumption that the Farquhar-Gan formulation is relevant and useful in describing leaf water isotopic enrichment.

    Environmental effects on oxygen isotope enrichment of leaf water in cotton leaves. Publishing Authors By Initials

    f ripulloneF Ripullone,n matsuoN Matsuo,h stuart-williamsH Stuart-Williams,sc wongSC Wong,m borghettiM Borghetti,m taniM Tani,g farquharG Farquhar,

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    Environmental effects on oxygen isotope enrichment of leaf water in cotton leaves. Journal Published:

    PUBLICATION TYPE: Journal Article

    Journal: Plant physiology

    VOLUME: 146

    Page Numbers: 729-36

    Journal Abbreviation: Plant Physiol.

    ISSN: 0032-0889

    DAY: 7

    MONTH: 12

    YEAR: 2007

    Environmental effects on oxygen isotope enrichment of leaf water in cotton leaves. Information

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    LANGUAGE: eng

    NlmUniqueID: 401224

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    Grant and Affiliation Information for Environmental effects on oxygen isotope enrichment of leaf water in cotton leaves.

    AFFILIATION: Environmental Biology Group, Research School of Biological Sciences, Australian National University, Canberra, Australian Capital Territory 2600, Australia.

    Country: United States

    United States Research PublicationUnited States Research Publication

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    MEDLINETA: Plant Physiol

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