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相关概念视频

Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
Osmoregulation in Insects01:47

Osmoregulation in Insects

Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.

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相关实验视频

Updated: Jul 12, 2026

High-Throughput Assays of Critical Thermal Limits in Insects
06:58

High-Throughput Assays of Critical Thermal Limits in Insects

Published on: June 15, 2020

昆虫中的快速冷硬过程.

R E Lee, C P Chen, D L Denlinger

    Science (New York, N.Y.)
    |December 4, 1987
    PubMed
    概括

    昆虫表现出快速的冷硬化,快速的防护反应对寒冷冲击伤害,独立于过冬的适应. 在未过冬的昆虫中,这种过程与糖积累有关.

    科学领域:

    • 昆虫生理学 昆虫生理学
    • 低温生物学 低温生物学
    • 动物适应 动物适应

    背景情况:

    • 传统的昆虫耐寒性研究强调季节性,长期的过冬适应.
    • 快速冷硬化 (RCH) 是一个不太了解的现象,它可以立即保护人免受冷震.

    研究的目的:

    • 为了研究非冬季化昆虫阶段的快速冷硬反应.
    • 确定这种快速反应背后的生理机制.

    主要方法:

    • 暴露非吸食幼虫,成年虫和选定昆虫物种的成年虫在寒冷冲击条件下.
    • 对寒冷耐受性和生存率的观察.
    • 对冷保护剂积累的分析,特别是糖醇.

    主要成果:

    • 在Sarcophaga crassipalpis,Xanthogaleruca luteola和Oncopeltus fasciatus的非病变阶段观察到一个快速的冷硬反应.
    • 这种快速硬化能在超冷点以上的温度下,防止寒冷冲击损伤.
    • 快速硬化反应与增加的糖醇积累有显著的相关性.

    结论:

    • 昆虫具有快速冷硬化机制,与季节性过冬适应不同.

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  • 甘油在调解快速冷硬化和保护昆虫免受急性寒冷压力方面发挥着至关重要的作用.