HR: 10:20h
AN: A32A-01 INVITED     [Abstracts]
TI: The Light Driven Emission of Monoterpenes from Broadleaf Tree Species
AU: * Kesselmeier, J
EM: jks@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Department, Joh.-J.-Becher-Weg 27, Mainz, 55128 Germany
AB: Plant isoprene emissions are known to be both light and temperature dependent and are modeled accordingly. Contrasting, monoterpene emissions were regarded to underlie temperature dependence only. However, during the last decade several Mediterranean tree species were reported to emit monoterpenes triggered by light and temperature in very close relation to actual carbon fixation. Further studies with African and European plant species as well as from first studies within the Amazonian rainforest show that the release of isoprene and monoterpenes occurs under a very similar regulation. Furthermore, recent research delivered new insight into the biochemical pathways showing that both groups of isoprenoids are produced in chloroplasts within the same biochemical pathways. Immediate release under regulation of light and temperature is a common characteristic too. Additionally, compounds such as monoterpenes may be stored in plant tissues with special functions. Such storage phenomena can be regarded as special cases.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere: composition and chemistry
DE: 0426 Biosphere/atmosphere interactions (0315)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005