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Circadian control of isoprene emissions from oil palm ( Elaeis guineensis )
Author(s) -
Wilkinson Michael J.,
Owen Susan M.,
Possell Malcolm,
Hartwell James,
Gould Peter,
Hall Anthony,
Vickers Claudia,
Nicholas Hewitt C.
Publication year - 2006
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/j.1365-313x.2006.02847.x
Subject(s) - isoprene , elaeis guineensis , photosynthetically active radiation , palm oil , circadian clock , environmental science , botany , photosynthesis , circadian rhythm , atmospheric sciences , biology , horticulture , chemistry , agroforestry , physics , organic chemistry , neuroscience , copolymer , polymer
Summary The emission of isoprene from the biosphere to the atmosphere has a profound effect on the Earth's atmospheric system. Until now, it has been assumed that the primary short‐term controls on isoprene emission are photosynthetically active radiation and temperature. Here we show that isoprene emissions from a tropical tree (oil palm, Elaeis guineensis ) are under strong circadian control, and that the circadian clock is potentially able to gate light‐induced isoprene emissions. These rhythms are robustly temperature compensated with isoprene emissions still under circadian control at 38°C. This is well beyond the acknowledged temperature range of all previously described circadian phenomena in plants. Furthermore, rhythmic expression of LHY/CCA1 , a genetic component of the central clock in Arabidopsis thaliana , is still maintained at these elevated temperatures in oil palm. Maintenance of the CCA1/LHY‐TOC1 molecular oscillator at these temperatures in oil palm allows for the possibility that this system is involved in the control of isoprene emission rhythms. This study contradicts the accepted theory that isoprene emissions are primarily light‐induced.