Manocha M S, Campbell C D
Can J Microbiol. 1978 Jun;24(6):670-4. doi: 10.1139/m78-112.
The fatty acid composition of a slightly psychrophilic fungus, Thamnidium elegans, has been determined and compared with other mucoraceous fungi. The growth temperature strongly influences the degree of unsaturation of lipids, as reported for other organisms, but in T. elegans both the quantitative and qualitative profiles of the fatty acids are affected. At low temperature, T. elegans contains both alpha- and gamma-isomers of linolenic acid. The alpha-isomer is reported here for the first time in a mucoraceous fungus. Besides the biosynthesis of alpha-linolenic acid at the low temperature, T. elegans shows an increase in synthesis of a relatively unknown fatty acid in fungi, i.e. octadecatetraenoic acid (18:4delta 6,9,12,15). The significance of the occurrence of both the isomers of linolenic acid as a response to temperature and in relation to fungal phylogeny is discussed.
已测定了一种轻度嗜冷真菌雅致枝霉的脂肪酸组成，并与其他毛霉科真菌进行了比较。如其他生物一样，生长温度强烈影响脂质的不饱和度，但在雅致枝霉中，脂肪酸的定量和定性分布均受到影响。在低温下，雅致枝霉同时含有α-和γ-异构体的亚麻酸。α-异构体在毛霉科真菌中首次在此被报道。除了在低温下生物合成α-亚麻酸外，雅致枝霉还显示出一种在真菌中相对不为人知的脂肪酸——十八碳四烯酸（18:4δ6,9,12,15）的合成增加。讨论了亚麻酸两种异构体的出现作为对温度的响应以及与真菌系统发育的关系的意义。
