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| Titel |
Short term changes in methanol emission and pectin methylesterase activity are not directly affected by light in Lycopersicon esculentum |
| VerfasserIn |
P. Y. Oikawa, L. Li, M. P. Timko, J. E. Mak, M. T. Lerdau |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 4 ; Nr. 8, no. 4 (2011-04-29), S.1023-1030 |
| Datensatznummer |
250005701
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| Publikation (Nr.) |
 copernicus.org/bg-8-1023-2011.pdf |
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| Zusammenfassung |
| Plants are an important source of atmospheric methanol (MeOH), the second
most abundant organic gas after methane. Factors regulating phytogenic MeOH
production are not well constrained in current MeOH emission models.
Previous studies have indicated that light may have a direct influence on
MeOH production. As light is known to regulate cell wall expansion, it was
predicted that light would stimulate MeOH production through the pectin
methylesterase (PME) pathway. MeOH emissions normalized for stomatal
conductance (gs) did not, however, increase with light over short time
scales (20–30 min). After experimentally controlling for gs and
temperature, no light activation of PME activity or MeOH emission was
observed. The results clearly demonstrate that light does not directly
influence short-term changes in MeOH production and emission. Our data
suggest that substrate limitation may be important in regulating MeOH
production over short time scales. Future investigation of the long-term
impacts of light on MeOH production may increase understanding of MeOH
emission dynamics at the seasonal time scale. |
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