摘要
为了研究大熊猫对食物的化学性消化特点和机制,测定了9只大熊猫唾液和3只大熊猫胃肠道中主要消化酶的活力,并与其他动物进行了比较。结果显示,大熊猫唾液呈碱性,蛋白酶和淀粉酶等消化酶活力低;肠道中淀粉酶活力高,而脂肪酶活力明显低于棕熊。大熊猫小肠粘膜中存在显著量的蔗糖酶、乳糖酶和麦芽糖酶活力。另外,在1只大熊猫胃和直肠液中检测到了少量纤维素酶活力。研究结果提示,大熊猫唾液直接参与食物消化的作用可能很弱;大熊猫对淀粉类食物有很好的消化能力,但对脂肪类食物消化能力相对不高。大熊猫胃肠道消化酶的活力特点适应其消化天然食物中的营养物质。
The objective of this research was to investigate the characteristics and mechanisms of chemical digestion of food in giant pandas. Digestive enzyme activities were assayed in saliva samples from nine giant pandas, and stomach and intestinal fluid from three giant pandas, and compared with those of other animals. Giant panda saliva exhibited alkaline properties with low protease and amylase activity. High levels of amylase activity were detected in the giant panda intestine, whereas lipase activity was much lower than that in the brown bear. The intestinal mucous from giant pandas contained significant sucrase, lactase and mahase activities. Low cellulase activity was detected in the stomach and rectum of one giant panda. These results suggest that the digestive function of saliva might be very weak in the giant panda. Giant pandas have strong abilities to digest food rich in starch but relatively low abilities to digest food rich in fat based on the enzymatic activities in the intestines. The activities of digestive enzymes in the giant panda stomach and intestine have adapted to their unique diet.
出处
《四川动物》
CSCD
北大核心
2009年第3期397-400,共4页
Sichuan Journal of Zoology
基金
成都市建设管理委员会和成都大熊猫繁育研究基金会资助项目(No.199908)
关键词
大熊猫
胃
肠道
消化
酶
giant panda
stomach
intestine
digestion
enzyme
