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首页> 外文期刊>Mycologia >Influence of growth temperature on lipid and soluble carbohydrate synthesis by fungi isolated from fellfield soil in the maritime Antarctic.
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Influence of growth temperature on lipid and soluble carbohydrate synthesis by fungi isolated from fellfield soil in the maritime Antarctic.

机译：生长温度对海洋南极耕地土壤中分离的真菌合成脂质和可溶性碳水化合物的影响。

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摘要

The effects of growth temperature on soluble carbohydrate and lipid content of Humicola marvinii, Geomyces pannorum and Mortierella elongata isolated from the Antarctic (Signy Island; 60o 43'S, 45o38'W) were investigated. Each of these fungi responded differently to suboptimal growth temperatures. At low temperatures Humicola marvinii accumulated cryoprotective carbohydrates (trehalose intracellularly and glycerol extracellularly), whereas Geomyces pannorum responded by altering its lipid composition with increases in unsaturated lipid content and overall unsaturation index. In the case of Mortierella elongata, features that may influence its ability to grow at low temperatures included the absence of detectable ergosterol, the presence of stearidonic acid and increased amounts of intracellular trehalose when grown at lower temperatures. The relative importance of lipid and carbohydrate metabolism in adaptation to temperature stress in these fungi is discussed.
机译：研究了生长温度对分离自南极洲（Signy Island; 60o 43'S，45o38'W）的马氏腐质霉（Humicola marvinii），潘诺菌（Geomyces pannorum）和长孢莫氏菌（Mortierella elongata）的可溶性碳水化合物和脂质含量的影响。这些真菌中的每一种对次优生长温度的反应都不同。在低温下，马氏腐质霉积累了冷冻保护性碳水化合物（细胞内的海藻糖和细胞外的甘油），而潘诺霉菌则通过改变其脂质组成来响应，其不饱和脂质含量和总体不饱和指数增加。就长孢单胞菌而言，可能影响其在低温下生长的能力的特征包括缺少可检测的麦角固醇，硬脂酸的存在以及在较低温度下生长时细胞内海藻糖含量的增加。讨论了脂质和碳水化合物代谢在适应这些真菌的温度胁迫方面的相对重要性。

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