这些物质的适应性变化导致低温半致死温度的下降是抗寒性提高的生理基础。
The adaptability changes of these substrates led to a drop in low semi-lethal temperature, which was the physiological basis for increasing the cold-resistant adaptability.
越冬幼虫以“小分子糖—氨基酸—糖蛋白”物质系统形成抗寒基质，增强耐寒性。
So there is a substance system including "low molecular weight sugars-amino acid-glycoprotein" which enhances cold hardiness for overwintering larvae.
其中，抗寒种类淀粉粒小且水解彻底，还原糖含量高，脂类物质在形成层处高度聚集。
The starch of hard species disappeared completely, content of sugar were high fat and lipids were concentrated cambium layer.
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