根田鼠对食物单宁酸的解毒代价

在实验室条件下，测定了根田鼠对单宁酸的解毒代价。结果表明，在食物蛋白质为10％的条件下，摄食3％和6％单宁酸食物的根田鼠经尿液分泌的葡萄糖醛酸较对照组分别增加13．77％和38．80％；与对照组比较，在食物蛋白质为20％的条件下，摄食3％和6％单宁酸食物的实验个体尿液分泌的葡萄糖醛酸分别增加6．11％和22．25％。在食物蛋白质为10％时，用3％和6％单宁酸食物处理的个体，其尿液NH4^ —N含量较对照组个体分别增加51．69％和198．44％。在食物中蛋白质为20％时，摄食3％和6％单宁酸食物的试验个体，其尿液中的NH4^ —N含量分别较对照组高1．72％和74．19％。由此说明，单宁酸能显著增加根田鼠尿液葡萄糖醛酸分泌量，根田鼠尿液的NH4^ —N的含量随食物单宁酸增加而增高，从而增加动物机体对单宁酸的代谢价。

Metabolic costs (Microtus oeconomus) of tannic acid in root voles

Years of coevolution between plants and herbivores have resulted in a diverse array of plant defenses and herbivore counter\|defense. Tannins, a diverse group of polar, high molecular weight, found in many vascular plants (especially woody perennials), are characterized by their ability to precipitate proteins. Plant tannins affect many aspects of the consumer's digestion and metabolism, such as feed intake, dietary protein availability, activity of digestive enzyme, detoxification activity, post absorptive...