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Open Access item Instantaneous and historical temperature effects on α-pinene emissions in Pinus halepensis and Quercus ilex.
Noe, S. M.
|Keywords:||Pinus halepensis, Previous climate effects, Acclimation, Emission model, Quercus ilex|
|Publisher:||Academy of Environmental Biology, India|
|Citation:||Journal of Environmental Biology 32: 1-6 (2011)|
|Abstract:||We compared the role of instantaneous temperature and temperature history in the determination of α-pinene
emissions in Mediterranean conifer Pinus halepensis that stores monoterpenes in resin ducts, and in Mediterranean
broad-leaved evergreen Quercus ilex that lacks such specialized storage structures. In both species, α-pinene
emission rates (E) exhibited a significant exponential correlation with leaf temperature and the rates of photosynthetic
electron transport (JCO
) started to decrease after an optimum at approximately 35
C. However, there was a
higher dependence of E on mean temperature of previous days than on mean temperature of current day for P.
halepensis but not for Q. ilex. JCO
showed a maximum relationship to mean temperature of previous 3 and
5 days for P. halepensis and Q. ilex respectively. We conclude that although the best correlation of emission
rates were found for instantaneous foliar temperatures, the effect of accumulated previous temperature con|
|Description:||6 páginas,4 figuras.|
|Publisher version (URL):||http://jeb.co.in/journal_issues/201101_jan11/paper_01.pdf|
|Appears in Collections:||(CEAB) Artículos|
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