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白肩的代谢调整和消化功能中的表型灵活性:对短期温度适应的反应

Ming Li¹, Mingru Xu¹, Jing Wang¹

¹College of Life and Environmental Sciences, Wenzhou University, Wenzhou 325035, China. Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou, China.

The Journal of experimental biology

|November 27, 2023

概括

像白肩鸟这样的小鸟调整了他们的新陈代谢和消化,以生存在寒冷的温度下. 寒冷适应增加了能量摄入量,并改变了器官功能,以支持更高的代谢热量产生.

科学领域:

生理生态生态学生理生态学
动物的新陈代谢
鸟类生物学鸟类生物学

背景情况:

小鸟主要使用代谢热量生产来适应变化的环境温度.
了解像白肩 (Sturnus sinensis) 这样的物种如何调整新陈代谢对于预测应对气候变化的反应至关重要.

研究的目的:

测试白肩是否通过温度适应过程中的组织和器官变化调节基底代谢.
探究在对寒冷和温暖环境的反应中代谢调整背后的生理和生化机制.

主要方法:

测量身体质量,基础代谢率 (BMR),器官湿质量,以及细胞呼吸 (呼吸状态4,S4R) 和酶活性 (细胞染色体c氧化酶,CCO).
在不同温度适应条件下分析胸肌代谢物,能量摄入,十二指肠组织学和消化酶活性.
利用代谢分析来确定胸部组织中的生化变化.

主要成果:

寒冷的适应导致了更重的肠道和更轻的胸部肌肉,以及关键器官 (肝脏,心脏,脏) 中S4R和CCO活性增加.
代谢分析显示,在寒冷适应的鸟类中,脂质和氨基酸分解,ATP水解以及GTP和生物素的合成增加.
寒冷适应增加了能量摄入量,但降低了消化效率,增强了十二指肠马尔塔酶活性和小长度.

结论:

白肩在适应温度变化时,在代谢和消化功能方面表现出显著的表型灵活性.
这些调整,包括改变组织功能和增强消化能力,有助于应对寒冷环境的能量需求,并影响基本代谢率.

关键词:

这种 (Sturnus sinensis) 是一种.基本代谢率基本代谢率寒冷的适应寒冷的适应消化功能消化功能热生成是一种热生成.

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