Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 408728
Title A moderate change in temperature induces changes in fatty acid composition of storage and membrane lipids in a soil arthropod
Author(s) Dooremalen, C. van; Ellers, J.
Source Journal of Insect Physiology 56 (2010)2. - ISSN 0022-1910 - p. 178 - 184.
Department(s) PRI BIOINT Entomology & Virology
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) orchesella-cincta collembola - thermal-reaction norms - biological significance - european populations - stress resistance - enzyme-activities - cold - growth - triacylglycerols - acclimation
Abstract A moderate change in ambient temperature can lead to vital physiological and biochemical adjustments in ectotherms, one of which is a change in fatty acid composition. When temperature decreases, the composition of membrane lipids (phospholipid fatty acids) is expected to become more unsaturated to be able to maintain homeoviscosity. Although different in function, storage lipids (triacylglycerol fatty acids) are expected to respond to temperature changes in a similar way. Age-specific differences, however, could influence this temperature response between different life stages. Here, we investigate if fatty acid composition of membrane and storage lipids responds similarly to temperature changes for two different life stages of Orchesella cincta. Juveniles and adults were cold acclimated (15 °C ¿ 5 °C) for 28 days and then re-acclimated (5 °C ¿ 15 °C) for another 28 days. We found adult membranes had a more unsaturated fatty acid composition than juveniles. Membrane lipids became more unsaturated during cold acclimation, and a reversed response occurred during warm acclimation. Membrane lipids, however, showed no warm acclimation, possibly due to the moderate temperature change. The ability to adjust storage lipid composition to moderate changes in ambient temperature may be an underestimated fitness component of temperature adaptation because fluidity of storage lipids permits accessibility of enzymes to energy reserves.
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