Water stress, temperature, and light effects on the capacity for isoprene emission and photosynthesis of kudzu leaves

Kudzu (Pueraria lobata (Willd) Ohwi.) is a vine which forms large, monospecific stands in disturbed areas of the southeastern United States. Kudzu also emits isoprene, a hydrocarbon which can significantly affect atmospheric chemistry including reactions leading to tropospheric ozone. Study of physi...

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Bibliographic Details
Published in:Oecologia 1993-09, Vol.95 (3), p.328-333
Main Authors: Sharkey, T.D. (Wisconsin Univ., Madison, (USA). Dept. of Botany), Loreto, F
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Dehydration
Ecotoxicology, biological effects of pollution
ESTADOS UNIDOS DE AMERICA
ESTRES DE SEQUIA
ETATS UNIS
FACTEUR DU MILIEU
FACTORES AMBIENTALES
FEUILLE
Flux density
FOTOSINTESIS
Fundamental and applied biological sciences. Psychology
HOJAS
Hydrocarbons
Induction (isoprene emission)
Isoprene emission
Kudzu
Kudzu (isoprene emission)
Leaves
Photons
PHOTOSYNTHESE
Photosynthesis
Plants
Pollutant emissions
Pueraria lobata
Pueraria lobata (Willd) Ohwi
PUERARIA THUNBERGIANA
RADIACIONES
RADIATION
STRESS DU A LA SECHERESSE
TEMPERATURA
TEMPERATURE
Temperature response
Terrestrial environment, soil, air
Water temperature
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Summary:Kudzu (Pueraria lobata (Willd) Ohwi.) is a vine which forms large, monospecific stands in disturbed areas of the southeastern United States. Kudzu also emits isoprene, a hydrocarbon which can significantly affect atmospheric chemistry including reactions leading to tropospheric ozone. Study of physiological aspects of isoprene emission from kudzu so the ecological consequences of isoprene emission can be better understood. Examinations: (a) the development of isoprene emission as leaves developed, (b) the interaction between photon flux density and temperature effects on isoprene emission, (c) isoprene emission during and after water stress, and (d) the induction of isoprene emission from leaves grown at low temperature by water stress or elevated temperature. Isoprene emission under standard conditions of 1000 micromol photons/m(2)/s and 30 degrees C developed only after the leaf had reached full expansion, and was not complete until up to two weeks past the point of full expansion of the leaf. The effect of temperature on isoprene emission was much greater than found for other species, with a 100 degrees C increase in temperature causing an eight-fold increase in the rate of isoprene emission. Isoprene emission from kudzu was stimulated by increases in photon flux density up to 3000 micromol photons/m(2)/s
ISSN:0029-8549
1432-1939
DOI:10.1007/bf00320984