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OtherWHOLE PLANT, ENVIRONMENTAL, AND STRESS PHYSIOLOGY
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Methanol Emission from Leaves (Enzymatic Detection of Gas-Phase Methanol and Relation of Methanol Fluxes to Stomatal Conductance and Leaf Development)

M. Nemecek-Marshall, R. C. MacDonald, J. J. Franzen, C. L. Wojciechowski, R. Fall
M. Nemecek-Marshall
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R. C. MacDonald
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J. J. Franzen
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C. L. Wojciechowski
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R. Fall
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Published August 1995. DOI: https://doi.org/10.1104/pp.108.4.1359

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Abstract

We recently reported the detection of methanol emissions from leaves (R. MacDonald, R. Fall [1993] Atmos Environ 27A: 1709–1713). This could represent a substantial flux of methanol to the atmosphere. Leaf methanol production and emission have not been investigated in detail, in part because of difficulties in sampling and analyzing methanol. In this study we used an enzymatic method to convert methanol to a fluorescent product and verified that leaves from several species emit methanol. Methanol was emitted almost exclusively from the abaxial surfaces of hypostomatous leaves but from both surfaces of amphistomatous leaves, suggesting that methanol exits leaves via stomates. The role of stomatal conductance was verified in experiments in which stomates were induced to close, resulting in reduced methanol. Free methanol was detected in bean leaf extracts, ranging from 26.8 [mu]g g-1 fresh weight in young leaves to 10.0 [mu]g g-1 fresh weight in older leaves. Methanol emission was related to leaf development, generally declining with increasing leaf age after leaf expansion; this is consistent with volatilization from a cellular pool that declines in older leaves. It is possible that leaf emission could be a major source of methanol found in the atmosphere of forests.

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Methanol Emission from Leaves (Enzymatic Detection of Gas-Phase Methanol and Relation of Methanol Fluxes to Stomatal Conductance and Leaf Development)
M. Nemecek-Marshall, R. C. MacDonald, J. J. Franzen, C. L. Wojciechowski, R. Fall
Plant Physiology Aug 1995, 108 (4) 1359-1368; DOI: 10.1104/pp.108.4.1359

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Methanol Emission from Leaves (Enzymatic Detection of Gas-Phase Methanol and Relation of Methanol Fluxes to Stomatal Conductance and Leaf Development)
M. Nemecek-Marshall, R. C. MacDonald, J. J. Franzen, C. L. Wojciechowski, R. Fall
Plant Physiology Aug 1995, 108 (4) 1359-1368; DOI: 10.1104/pp.108.4.1359
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Plant Physiology
Vol. 108, Issue 4
Aug 1995
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  • Identification of a Functional Homolog of the Yeast Copper Homeostasis Gene ATX1 from Arabidopsis
  • Protein Changes in Response to Progressive Water Deficit in Maize
  • Induction of a Carbon-Starvation-Related Proteolysis in Whole Maize Plants Submitted to Light/Dark Cycles and to Extended Darkness
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