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首页> 外文期刊>Journal of Comparative Physiology, B. Biochemical, Systemic, and Environmental Physiology >Anoxia tolerance and anaerobic metabolism in two tropical weevil species(Coleoptera, Curculionidae)
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Anoxia tolerance and anaerobic metabolism in two tropical weevil species(Coleoptera, Curculionidae)

机译：两种热带象鼻虫（鞘翅目，Cur科）的耐缺氧性和厌氧代谢

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摘要

Although the two curculionid beetle species Cosmopolites sordidus and Temnoschoita nigroplagiata are found in the same habitat (banana plantation), they differ with respect to their microhabitat preference and thereby in their risk of being submerged after rain. The physiological characteristics of the two species that might be important in this context were investigated. As expected, C. sordidus is more resistant to submergence (faster recovery, lower mortality: 30% after 9 days submergence at 20 degreesC); this can be attributed to a generally lower metabolic rate, higher glycogen reserves (135 pmol glycosyl units.g FW-1) and a moderate lactate production under anoxia. In T. nigroplagiata, the glycogen reserves are almost completely depleted after 1 day submergence at 20 degreesC and a higher proportion of this glycogen can recovered as lactate (16%). During submergence, the adenylate energy charge falls in both species to 0.2 or below, whereas the total adenine nucleotide content decreases only slowly, especially in C. sordidus.
机译：尽管在同一个栖息地（香蕉种植园）中发现了两种臭皮甲虫物种Cosmopolites sordidus和Temnoschoita nigroplagiata，但它们的微生境偏好不同，因此在雨后被淹没的风险也有所不同。研究了在此背景下可能很重要的两个物种的生理特征。正如预期的那样，C。sordidus对浸没的抵抗力更大（恢复更快，死亡率更低：20°C浸入9天后为30％）;这可以归因于总体上较低的代谢率，较高的糖原储备（135 pmol糖基单位g。FW-1）和在缺氧条件下中等的乳酸产生。在T. nigroplagiata中，在20°C下浸没1天后，糖原储备几乎被完全耗尽，并且该糖原的较高比例可以作为乳酸回收（16％）。在淹没过程中，两个物种的腺苷酸能电荷均下降至0.2或更低，而总腺嘌呤核苷酸含量仅缓慢下降，特别是在C. sordidus中。

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