食行为的生理约束:大的肠膜脱糖化
C Martinez del Rio1, B R Stevens
1Department of Zoology, University of Florida, Gainesville 32611.
Science (New York, N.Y.)
|February 10, 1989
概括
欧洲 avoid 避免糖因缺乏糖酶,一种必不可少的消化酶. 这种饮食酶缺乏影响它们的能量来源选择,并突出了肠道酶在动物植物相互作用中的作用.
科学领域:
- 动物生理学 动物生理学
- 生物化学 生物化学
- 进化生物学是进化生物学.
背景情况:
- 动物表现出选择性养行为,包括在不同糖类之间做出选择.
- 控制这些养选择的潜在生理和生化机制在很大程度上是未知的.
- 了解这些机制对于理解动物饮食和生态相互作用至关重要.
研究的目的:
- 研究欧洲 (Sturnus vulgaris) 对不同糖溶液的食偏好.
- 确定欧洲中糖利用的生理基础.
- 探索肠道分糖酶在脊椎动物和植物共同进化的作用.
主要方法:
- 提供欧洲子在D-葡萄糖加D-果糖混合物和等分糖溶液之间进行选择.
- 通过输管注射施用糖,以评估其对血糖水平的影响.
- 分析了小肠边膜上脱糖酶 (糖酶,麦芽酶,异盐酶) 的存在和活性.
主要成果:
- 欧洲菜喜欢D-葡萄糖加D-果糖的混合物而不是糖溶液.
- 输管食糖并没有提高鸟类的血糖水平.
- 鸟类的肠边缘膜缺乏糖糖酶,但具有马尔塔酶和异马尔塔酶.
结论:
- 葡萄糖是欧洲的不可活力的能量来源,因为它们缺乏消化酶糖酶.
- 鸟和潜在的其他脊椎动物中的肠道脱糖酶的特定表达模式可能会影响它们的饮食选择.
- 肠道酶在脊椎动物和它们的植物食物来源之间的共同进化关系中发挥着重要作用.
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