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Title: Influence of environmental factors and air composition on the emission of {alpha}-pinene from Quercus ilex leaves

Abstract

We studied the emission of {alpha}-pinene from Quercus ilex leaves. Only the abaxial side of the hypostomatous Q. ilex leaf emits {alpha}-pinene. Light induced photosynthesis and {alpha}-pinene emission. However, the response of photosynthesis to dark-to-light transitions was faster than that of {alpha}-pinene, suggesting that ATP controls the emission. The emission was higher at 30 than at 20{degrees}C, whereas photosynthesis did not change. Therefore, the relationship between photosynthesis and {alpha}-pinene emission does not always hold. When CO{sub 2} was removed from the air, transpiration was stimulated and transpiration was reduced, but {alpha}-pinene emission was unaffected. Therefore, the emission depends on the availability of photosynthetic carbon, is not saturated at ambient CO{sub 2}, and is not dependent on stomatal opening. The pattern of {alpha}-pinene emission from Q. ilex is different from that of plants having specialized structures for storage and emission of terpenes. We suggest that {alpha}-pinene emitted by Q. ilex leaves is synthesized in the chloroplasts and shares the same biochemical pathway with isoprene emitted by isoprene-emitting oak species. 28 refs., 8 figs., 1 tab.

Authors:
;  [1];  [2]
  1. Consiglio Nazionale delle Ricerche-Istituto di Biochimica ed Ecofisologia Vegetali, Rome (Italy)
  2. Consiglio Nazionale delle Ricerche-Istituto per I`Inquinamento Atmosferico, Rome (Italy) [and others
Publication Date:
OSTI Identifier:
255242
Resource Type:
Journal Article
Journal Name:
Plant Physiology (Bethesda)
Additional Journal Information:
Journal Volume: 110; Journal Issue: 1; Other Information: PBD: Jan 1996
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ATMOSPHERIC CHEMISTRY; BIOLOGICAL EFFECTS; OAKS; EMISSION

Citation Formats

Loreto, F., Tricoli, D., and Ciccioli, P. Influence of environmental factors and air composition on the emission of {alpha}-pinene from Quercus ilex leaves. United States: N. p., 1996. Web.
Loreto, F., Tricoli, D., & Ciccioli, P. Influence of environmental factors and air composition on the emission of {alpha}-pinene from Quercus ilex leaves. United States.
Loreto, F., Tricoli, D., and Ciccioli, P. Mon . "Influence of environmental factors and air composition on the emission of {alpha}-pinene from Quercus ilex leaves". United States.
@article{osti_255242,
title = {Influence of environmental factors and air composition on the emission of {alpha}-pinene from Quercus ilex leaves},
author = {Loreto, F. and Tricoli, D. and Ciccioli, P.},
abstractNote = {We studied the emission of {alpha}-pinene from Quercus ilex leaves. Only the abaxial side of the hypostomatous Q. ilex leaf emits {alpha}-pinene. Light induced photosynthesis and {alpha}-pinene emission. However, the response of photosynthesis to dark-to-light transitions was faster than that of {alpha}-pinene, suggesting that ATP controls the emission. The emission was higher at 30 than at 20{degrees}C, whereas photosynthesis did not change. Therefore, the relationship between photosynthesis and {alpha}-pinene emission does not always hold. When CO{sub 2} was removed from the air, transpiration was stimulated and transpiration was reduced, but {alpha}-pinene emission was unaffected. Therefore, the emission depends on the availability of photosynthetic carbon, is not saturated at ambient CO{sub 2}, and is not dependent on stomatal opening. The pattern of {alpha}-pinene emission from Q. ilex is different from that of plants having specialized structures for storage and emission of terpenes. We suggest that {alpha}-pinene emitted by Q. ilex leaves is synthesized in the chloroplasts and shares the same biochemical pathway with isoprene emitted by isoprene-emitting oak species. 28 refs., 8 figs., 1 tab.},
doi = {},
journal = {Plant Physiology (Bethesda)},
number = 1,
volume = 110,
place = {United States},
year = {1996},
month = {1}
}