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ESTIMATES OF ISOPRENE AND MONOTERPENE EMISSION RATES IN PLANTS
Citation:
Evans, R., D. Tingey, M. Gumpertz, AND W. Burns. ESTIMATES OF ISOPRENE AND MONOTERPENE EMISSION RATES IN PLANTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-82/196.
Description:
A range of plant species, including crops, shrubs, herbs, and trees, was surveyed to determine the magnitude of isoprene emissions. In studies to determine if plants emitted isoprene, greenhouse-grown plants were encapsulated in impermeable plastic bags and kept in a growth chamber for 2 h at 30C and a photosynthetic photon flux density of ca. 350 micro E m-2s-1. To estimate emission rates, greenhouse-grown plants were conditioned in a growth chamber and transferred to a controlled-environment gas-exchange chamber. Gas samples from either the encapsulation bags or gas-exchange chamber were collected, concentrated cryogenically, and analyzed by gas-liquid chromatography.