Fatty acid composition of spruce needle lipids after exposure to air pollutants
Abstract
Alterations in the fatty acid composition of membrane lipids have been observed in long-term experiments using realistic exposures of air pollutants. Monogalactosyl diglyceride (MGDG), from red spruce, showed a 12% reduction in linolenic acid (18:3) compared with controls, after a 21 week winter fumigation with SO{sub 2} NO{sub 2} (20 ppb each). The composition of phosphatidyl choline from the same trees was unaffected. In Norway spruce exposed to 70 ppb O{sub 3} for 3 consecutive summers there was no treatment effect on 18:3 content of MGDG, which ranged from 70 to 80%, with highest values in November. The percentage of octadecatetranoic acid (18:4) also varied seasonally. Compared with controls, polluted plants had proportionally less 18:4 during autumn, perhaps indicating some effect of O{sub 3} on the winter hardening process. Our observations emphasize the need for long-term experiments to investigate subtle disturbances to seasonal metabolic cycles.
- Authors:
-
- Univ. of Lancaster (England)
- Publication Date:
- OSTI Identifier:
- 5770842
- Report Number(s):
- CONF-9007196-
Journal ID: ISSN 0079-2241; CODEN: PPYSA
- Resource Type:
- Conference
- Journal Name:
- Plant Physiology, Supplement; (United States)
- Additional Journal Information:
- Journal Volume: 93:1; Conference: Annual meeting of the American Society of Plant Physiologists, Indianapolis, IN (United States), 29 Jul - 2 Aug 1990; Journal ID: ISSN 0079-2241
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; 54 ENVIRONMENTAL SCIENCES; OZONE; BIOLOGICAL EFFECTS; CARBOXYLIC ACIDS; LEAVES; LIPIDS; MEMBRANES; SPRUCES; CONIFERS; ORGANIC ACIDS; ORGANIC COMPOUNDS; PINOPHYTA; PLANTS; TREES; 550200* - Biochemistry; 540110
Citation Formats
Wolfenden, J, and Wellburn, A R. Fatty acid composition of spruce needle lipids after exposure to air pollutants. United States: N. p., 1990.
Web.
Wolfenden, J, & Wellburn, A R. Fatty acid composition of spruce needle lipids after exposure to air pollutants. United States.
Wolfenden, J, and Wellburn, A R. 1990.
"Fatty acid composition of spruce needle lipids after exposure to air pollutants". United States.
@article{osti_5770842,
title = {Fatty acid composition of spruce needle lipids after exposure to air pollutants},
author = {Wolfenden, J and Wellburn, A R},
abstractNote = {Alterations in the fatty acid composition of membrane lipids have been observed in long-term experiments using realistic exposures of air pollutants. Monogalactosyl diglyceride (MGDG), from red spruce, showed a 12% reduction in linolenic acid (18:3) compared with controls, after a 21 week winter fumigation with SO{sub 2} NO{sub 2} (20 ppb each). The composition of phosphatidyl choline from the same trees was unaffected. In Norway spruce exposed to 70 ppb O{sub 3} for 3 consecutive summers there was no treatment effect on 18:3 content of MGDG, which ranged from 70 to 80%, with highest values in November. The percentage of octadecatetranoic acid (18:4) also varied seasonally. Compared with controls, polluted plants had proportionally less 18:4 during autumn, perhaps indicating some effect of O{sub 3} on the winter hardening process. Our observations emphasize the need for long-term experiments to investigate subtle disturbances to seasonal metabolic cycles.},
doi = {},
url = {https://www.osti.gov/biblio/5770842},
journal = {Plant Physiology, Supplement; (United States)},
issn = {0079-2241},
number = ,
volume = 93:1,
place = {United States},
year = {Tue May 01 00:00:00 EDT 1990},
month = {Tue May 01 00:00:00 EDT 1990}
}