EMISSION OF MONOTERPENES AND ISOPRENE FROM A MEDITERRANEAN OAK SPECIES QUERCUS-ILEX L MEASURED WITHIN THE BEMA (BIOGENIC EMISSIONS IN THE MEDITERRANEAN AREA) PROJECT

We report on some results of our studies of monoterpene and isoprene e missions and the physiological activities of an oak species (Quercus i lex L.) under the Mediterranean climatic conditions found at Castel Po rziano (Rome) in June 1993. The oak species Quercus ilex L. was found to emit mainly monoterpenes in high amounts. Isoprene emissions were n egligible. Diel cycles of monoterpene emissions showed correlation wit h light and the diel behaviour of photosynthetic CO2 assimilation, tra nspiration and stomatal conductance. Temperature dependence seemed to be of minor importance.