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ESTIMATES OF ISOPRENE AND MONOTERPENE EMISSION RATES IN PLANTS
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.
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.