scholarly journals The Effect of Temperature on the Level and Biosynthesis of Unsaturated Fatty Acids in Diacylglycerols of Brassica napus Leaves

1988 ◽  
Vol 87 (4) ◽  
pp. 904-910 ◽  
Author(s):  
John P. Williams ◽  
Mobashsher U. Khan ◽  
Kirk Mitchell ◽  
Geoff Johnson
Keyword(s):  
Fatty Acids ◽  
Brassica Napus ◽  
Unsaturated Fatty Acids ◽  
Effect Of Temperature

The effect of temperature on the fatty acids and isozymes of a psychrotrophic and two mesophilic species ofXenorhabdus, a bacterial symbiont of entomopathogenic nematodes

2001 ◽  
Vol 47 (5) ◽  
pp. 382-391 ◽  
Author(s):  
Hongjun He ◽  
Roger Gordon ◽  
John A Gow
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Unsaturated Fatty Acids ◽  
Arachidic Acid ◽  
Distinct Species ◽  
Temperature Adaptation ◽  
Effect Of Temperature ◽  
Xenorhabdus Nematophila

In the first part of this study, generation times relative to temperature, together with cardinal and conceptual temperatures, were determined for four strains of Xenorhabdus bacteria that represented three geographically distinct species. The data showed that the NF strain of Xenorhabdus bovienii, like the Umeå strain of the same species, is psychrotrophic, while Xenorhabdus sp. TX strain resembles Xenorhabdus nematophila All strain in being mesophilic. In the second part, the capacity of these bacteria to adapt to changes in temperature, shown by changes in fatty acid composition, was investigated. As temperature declined, the proportions of the two major unsaturated fatty acids, palmitoleic (16:1ω7) acid and oleic (18:1ω9) acid, increased significantly in all of the strains. The proportion of the prevalent saturated fatty acid, which was palmitic acid (16:0), decreased. In the All, NF, and Umeå strains, myristic acid (14:0), margaric acid (17:0), cyclopropane (17:0c), and arachidic acid (20:0) decreased with decreasing temperature. In the third part of the study, the synthesis of isozymes in response to changing temperature was investigated. For the seven enzymes studied, the numbers for which isozyme synthesis was temperature related were as follows: five for Umeå, four for All, three for NF, and two for TX. Where the study dealt with fatty acid composition and isozyme synthesis, the results show a broad capacity for physiological temperature adaptation among strains of different climatic origin.Key words: Xenorhabdus, temperature, psychrotroph, mesophile, fatty acid, isozyme.

Effect of temperature on preference for dietary unsaturated fatty acids in the Djungarian hamster (Phodopus sungorus)

2000 ◽  
Vol 78 (8) ◽  
pp. 1361-1368 ◽  
Author(s):  
Sara M Hiebert ◽  
Erin K Fulkerson ◽  
Kirstin T Lindermayer ◽  
Sarah D McClure
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Saturated Fat ◽  
Phodopus Sungorus ◽  
Effect Of Temperature ◽  
Djungarian Hamster ◽  
Mean Body Temperature ◽  
Unsaturated Fat ◽  
Warm Environment ◽  
Short Days

Previous studies have shown that hibernators preparing for winter prefer a diet rich in unsaturated fat. This study was designed to determine if a daily heterotherm, the Djungarian hamster (Phodopus sungorus), shows a similar preference when given simultaneous access to two diets, one rich in saturated fat and the other rich in unsaturated fat. In two experiments, hamsters that had been exposed to short days for 8-10 weeks were exposed to 8°C for 10 days. When half of these animals were moved to a warm environment (26-29°C), they developed a significantly lower preference for the unsaturated diet than controls that remained at 8°C (P < 0.01). This difference in preference disappeared when the experimental group was returned to 8°C (P = 0.4). Although mean body temperature (Tb) was significantly lower (mean difference = 0.35°C) in experimental animals in the cold environment, most animals did not enter daily torpor at any time during the experiment. Together, these results suggest that the large decreases in core Tb accompanying torpor, originally assumed to necessitate the incorporation of unsaturated fatty acids into cell membranes of hibernators and daily heterotherms, are not necessary to stimulate changes in food choice.

Effect of temperature on preference for dietary unsaturated fatty acids in the Djungarian hamster (Phodopus sungorus)

2000 ◽  
Vol 78 (8) ◽  
pp. 1361-1368 ◽  
Author(s):  
Sara M. Hiebert ◽  
Erin K. Fulkerson ◽  
Kirstin T. Lindermayer ◽  
Sarah D. McClure
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Phodopus Sungorus ◽  
Effect Of Temperature ◽  
Djungarian Hamster

scholarly journals Effect of temperature on contents of essential highly unsaturated fatty acids in freshwater zooplankton

Limnologica ◽  
2011 ◽  
Vol 41 (4) ◽  
pp. 339-347 ◽  
Author(s):  
Michail I. Gladyshev ◽  
Vitaliy P. Semenchenko ◽  
Olga P. Dubovskaya ◽  
Elena B. Fefilova ◽  
Olesia N. Makhutova ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Effect Of Temperature ◽  
Highly Unsaturated Fatty Acids ◽  
Freshwater Zooplankton

scholarly journals EMS-induced Mutagenesis for C18 Unsaturated Fatty Acids in Rapeseed (Brassica napus L.)

2014 ◽  
Vol 59 (2) ◽  
pp. 128-133 ◽  
Author(s):  
Yong-Hwa Lee ◽  
Kwang-Soo Kim ◽  
Young-Seok Jang ◽  
In-Hu Choi
Keyword(s):  
Fatty Acids ◽  
Brassica Napus ◽  
Unsaturated Fatty Acids ◽  
Brassica Napus L ◽  
Induced Mutagenesis
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