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| Web URL(s): | https://www.dl.sciencesocieties.org/publications/cs/articles/42/6/2031
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https://www.dl.sciencesocieties.org/publications/cs/pdfs/42/6/2031
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| Publication Type:
| Refereed |
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| Author(s): | Cyril, J.;
Powell, G. L.;
Duncan, R. R.;
Baird, W. V. |
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| Author Affiliation: | Cyril, Baird: Department of Horticulture, Poole Agriculture Center, Clemson University, Clemson, SC; Powell: Department of Genetics and Biochemisty, Clemson University, Clemson, SC; and Duncan: University of Georgia, Griffin, GA |
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| Title: | Changes in membrane polar lipid fatty acids of seashore paspalum in response to low temperature exposure |
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| Source: | Crop Science. Vol. 42, No. 6, November/December 2002, p. 2031-2037. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Cold resistance; Cultivar evaluation; Cultivar variation; Fatty acids; Lipids; Paspalum vaginatum; Physiological responses; Salt tolerance; Temperature response; Turfgrass profile
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| Abstract/Contents: | "Seashore paspalum (Paspalum vaginatum Sw.) is a warm-season turfgrass, best known for its superior salt tolerance. Plants are subject to injury during winter conditions along the northern boundary of their zone of adaptation. New cultivars that are more tolerant to low temperatures are needed for use in the transition zone. Cold tolerance has been correlated with the degree of unsaturation in membrane lipid fatty acids. Unsaturated fatty acids are thought to aid in maintaining membranes in a fluid state necessary for biological functioning (homeophasic adaption). The primary objective was to characterize fatty acid composition of membrane lipids in three genotypes differing in cold tolerance. A second objective was to investigate changes in fatty acid content in these genotypes during exposure to low temperatures. Cold-treated plants were exposed to a 10-h photoperiod at 8°/4°C day/night temperatures and light intensity of 250μmol m-2 s-1 photosynthetic photon flux density for 3 wk. Rhizomes and crowns were harvested at 7-d intervals. Total lipids were extracted and the polar lipids separated by thin-layer chromatography. Fatty acids were identified by gas chromatography (GC) and mass spectroscopy. In all three genotypes, the two saturated fatty acids, palmitic acid and stearic acid, did not change during cold treatment. The triunsaturated linolenic acid increased significantly during low temperature exposure. The magnitude of change was greater in the finer-textured and more cold-tolerant PI 509018-1 (`SeaIsle1') than in the intermediately cold-tolerant `Adalayd' or in the cold-susceptible, coarse-textured PI 299042. These findings suggest that accumulation of linolenic acid partly explains the differential response in their cold tolerance." |
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| Language: | English |
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| References: | 39 |
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| Note: | Graphs
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cyril, J., G. L. Powell, R. R. Duncan, and W. V. Baird. 2002. Changes in membrane polar lipid fatty acids of seashore paspalum in response to low temperature exposure. Crop Sci. 42(6):p. 2031-2037. |
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| Web URL(s):
https://www.dl.sciencesocieties.org/publications/cs/articles/42/6/2031
Last checked: 05/05/2017
Access conditions: Item is within a limited-access website
https://www.dl.sciencesocieties.org/publications/cs/pdfs/42/6/2031
Last checked: 05/05/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 183 .C7 |
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