Phospholipid and fatty acid composition in leaves and roots of ten autumn chrysanthemum cultivars grown at low temperature

2017 ◽  
Vol 58 (4) ◽  
pp. 334-341
Author(s):  
Yan Li ◽  
Yonghua Li ◽  
Pan Yang ◽  
Hua’ao Zhang ◽  
Dan He
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Low Temperature ◽  
Acid Composition ◽  
Leaves And Roots

Effect of fabA and desA Mediated Low Temperature Adaption on Shewanella putrefaciens via Regulation of Unsaturated Fatty Acid Metabolism

2019 ◽  
Vol 11 (10) ◽  
pp. 1430-1437
Author(s):  
Li Chen ◽  
Shengping Yang ◽  
Yunfang Qian ◽  
Jing Xie
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Low Temperature ◽  
Acid Composition ◽  
Fatty Acid Metabolism ◽  
Unsaturated Fatty Acid ◽  
Acid Metabolism ◽  
Shewanella Putrefaciens ◽  
Spoilage Bacteria ◽  
Temperature Environment

Shewanella putrefaciensis a kind of spoilage bacteria in low temperature chilled aquatic products, which seriously threats human health and aquaculture. The fatty acid composition of S. putrefaciens cell membranes has been shown to be involved in adaption of bacteria to various environments. However, the specific fatty acid metabolism of S. putrefaciens to the low temperature environment remains unknown. In this study, the growth of S. putrefaciens, the response of fatty acid composition to low temperature production, and the differential expression and synthesis of enzymes related to unsaturated fatty acid synthesis were investigated by lack of fabA and desA in S. putrefaciens. Results showed that loss of fabA and desA suppressed the growth of S. putrefaciens and reduced unsaturated fatty acid contents at low temperature. In addition, the upregulation of fabA, but not desA resulted in accumulation of unsaturated fatty acid. Up-regulations of fabA and desA both resulted in promotion of GPR41 and Retn gene and protein expressions. These results demonstrated that the deletions of fabA and desA resulted in reduction of unsaturated fatty acid and key downstream genes of fatty acid metabolism, which suggested that unsaturated fatty acid was involved in the adaptations of fabA and desA-mediated S. putrefaciens to the low temperature environment. These results provided a tentative mechanism of the synthesis of unsaturated fatty acids in S. putrefaciens under low temperature conditions.

The effect of low temperature on fatty acid composition and tocopherols of the red microalga, Porphyridium cruentum

2007 ◽  
Vol 19 (3) ◽  
pp. 223-227 ◽  
Author(s):  
Yaşar Durmaz ◽  
Margarida Monteiro ◽  
Narcisa Bandarra ◽  
Şevket Gökpinar ◽  
Oya Işik
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Low Temperature ◽  
Acid Composition ◽  
Porphyridium Cruentum ◽  
Red Microalga

scholarly journals Changes in Fatty Acid Composition and Saturation in Leaves and Roots of Creeping Bentgrass Exposed to High Soil Temperature

2004 ◽  
Vol 129 (6) ◽  
pp. 795-801 ◽  
Author(s):  
Xiaozhong Liu ◽  
Bingru Huang
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Soil Temperature ◽  
Acid Composition ◽  
Creeping Bentgrass ◽  
High Soil ◽  
Leaves And Roots ◽  
High Soil Temperature

Previous studies found that high soil temperature is more detrimental than high air temperature for the growth of creeping bentgrass (Agrostis palustris L.). The objective of the study was to investigate changes in fatty acid composition and saturation levels in leaves and roots for creeping bentgrass exposed to high soil temperature. Shoots and roots of `Penncross' plants were subjected to a differential air/soil temperature of 20/35 °C in a growth chamber. Soil temperature was controlled at 35 °C using an immersion circulating heater in water bath. Shoot injury induced by high soil temperature was evaluated by measuring level of lipid peroxidation expressed as malonyldialdehyde (MDA) content, chlorophyll content, and photochemical efficiency (Fv/Fm) of leaves. MDA content increased while chlorophyll content and Fv/Fm decreased at high soil temperature. The content of total fatty acids and different species of fatty acids were analyzed in both leaves and roots. Total fatty acid content in leaves increased initially at 5 days of high soil temperature and then decreased at 15 days, while total fatty acid content in roots decreased, beginning at 5 days. Linolenic acid was the major fatty acid in leaves and linoleic acid and palmitic acid were the major fatty acids in roots of creeping bentgrass. Leaf content of all fatty acid components except oleic acid increased initially and then decreased at high soil temperature. Root content of all fatty acid components except palmitoleic acid and oleic acid decreased, beginning at 5 d of high soil temperature. Oleic acid in leaves and palmitoleic and oleic acid in roots did not change during the entire experimental period. Leaf content of saturated fatty acids and unsaturated fatty acids increased during the first 5 to 10 days of high soil temperature and decreased at 15 and 25 days, respectively. Root content of saturated fatty acids and unsaturated fatty acids decreased beginning at 5 days of high soil temperature. Double bond index decreased in both leaves and roots. High soil temperature induced changes in fatty acid composition and saturation levels in leaves and roots, and this could be associated with physiological damages in leaves even though only roots were exposed to high temperature.

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