Record Display for the EPA National Library Catalog

RECORD NUMBER: 16 OF 22

OLS Field Name OLS Field Data
Main Title Isoprene Emissions and Photosynthesis in Three Ferns: The Influence of Light and Temperature (Journal Version).
Author Tingey, D. T. ; Evans, R. C. ; Bates, E. H. ; Gumpertz, M. L. ;
CORP Author Corvallis Environmental Research Lab., OR. ;Northrop Services, Inc., Corvallis, OR.
Publisher c1987
Year Published 1987
Report Number EPA/600/J-87/463;
Stock Number PB89-144380
Additional Subjects Photosynthesis ; Ferns ; Light(Visible radiation) ; Temperature ; Isoprene ; Plant physiology ; Terpene compounds ; Respiration ; Statistical data ; Reprints ; Biosynthesis ; Dicksonia antarctica ; Thelypteris decursive-pinnata ; Thelypteris kunthii
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Status
NTIS  PB89-144380 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/08/1989
Collation 10p
Abstract
A study was designed to determine the rates of isoprene emission and photosynthesis in three fern species and the independent influence of light and temperature on these processes. The plants were conditioned in a growth chamber and then transferred to a controlled environment chamber. Samples of the chamber atmosphere were collected; isoprene was concentrated and measured by gas chromatography. Only small amounts of isoprene were detected around the ferns in the dark. Isoprene emissions increased with increasing levels of photosynthetic photon flux density (PPFD) in all three species. Maximum isoprene emissions occurred between 35 and 39 C which is a lower temperature maximum than reported for angiosperms and gymnosperms. The increased emissions with temperature were primarily associated with increased biosynthetic rates for isoprene. Carbon lost through isoprene accounted for 0.02 to 2.6% of the carbon fixed during photosynthesis, depending on the PPFD level, temperature and fern species.