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侵袭性淡水海Trachemys scripta elegans和中国本土的淡水海之间对热应激有明显的代谢反应

Shufen Jiang¹, Changyi Zhang¹, Xiao Pan¹

¹Research Center of Herpetology, College of Life Science, Nanjing Normal University, Nanjing, China.

Integrative zoology

|January 3, 2024

概括

与本地物种相比,侵入性海对热应激有不同的代谢策略,这影响了它们在气候变化下的生存和传播. 这些生理差异突出了入侵生物学和环境变化之间的复杂相互作用.

科学领域:

*比较生理学 *比较生理学
* 侵袭生物学 * 侵袭生物学
* 适应气候变化适应气候变化

背景情况:

* 热耐受性的跨物种变化影响物种相互作用和生物入侵.
*了解热耐受性差异背后的生理机制对于预测入侵成功至关重要.
*气候变化加剧了研究物种对热应激反应的需要.

研究的目的:

* 为了比较侵袭性海 (Trachemys scripta elegans) 和两个本地物种 (Pelodiscus sinensis,Mauremys reevesii) 的热应激代谢反应.
* 调查能量传感,葡萄糖,脂质和三碳酸 (TCA) 循环代谢在差异性热容忍中的作用.
* 为了阐明T. scripta elegans在变化的热条件下入侵成功的生理基础.

主要方法:

*评估暴露于温度梯度的幼中的代谢物含量和基因表达/酶活性.
* 分析关键的代谢途径,包括能量感知,葡萄糖代谢,脂质代谢和TCA循环.
*对生理反应的特定物种的比较,特别是在肌肉组织中.

主要成果:

*侵入性T. scripta elegans比本地海显示出更大的能量传感器的转录调节.
*所有物种在极端高温下都利用了增强的无氧代谢,但与受抑制的本地物种相比,入侵者表现出关键酶 (酸碳酸酶,乳酸脱酶) 的更强的上调调.
*脂质代谢调节发生在T. scripta elegans和P. sinensis中,但不是M. reevesii;在热应力下,TCA循环在所有物种中保持功能.

结论:

* 对热应激的不同代谢反应有助于鱼物种之间的热耐受度的跨物种差异.
* 侵袭性T. scripta elegans的生理可塑性可能会在不断变化的热环境中赋予竞争优势.
*生理差异在气候变化和生物入侵之间的相互作用中起着重要作用.

关键词:

厌氧代谢的厌氧代谢气候变化气候变化气候变化能量代谢能量代谢淡水海是一种新鲜的海.两种物种之间的差异.侵入性物种是一种入侵性物种.

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