Author(s)

A. Lehning, I Zimmer, R. Steinbrecher, K. Hauff, N. Briiggemann and J -P Schnitzler

Abstract

Isoprene Synthase Activity and Its Relation to Isoprene Emission in Oaks A contribution to subproject BIATEX-2 A. Lehning, I Zimmer, R. Steinbrecher, K. Hauff, N. Briiggemann and J -P Schnitzler Fraunhofer-lnstitute for Atmospheric Environmental Research (IFU), Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany Introduction Atmospheric chemistry is strongly influenced by surface fluxes of biogenic volatile organic compounds such as isoprene. Therefore, understanding the regulation of isoprene synthesis and its emission plays an important role in improving estimates of plant VOC emission potentials on regional and global scales. Diurnal variations of isoprene emission are almost entirely due to variations of light intensity and leaf temperature with highest isoprene emission rates at noon under maximum temperature and light intensities. Regulation of isoprene emission by ligh

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