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水熊虫 Ramazzottius varieornatus 的比较超微结构研究：水合状态、干燥后和再水合过程中的比较。

A comparative ultrastructure study of the tardigrade Ramazzottius varieornatus in the hydrated state, after desiccation and during the process of rehydration.

机构信息

IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France.

ISEM, University of Montpellier, CNRS, IRD, Montpellier, France.

出版信息

PLoS One. 2024 Jun 6;19(6):e0302552. doi: 10.1371/journal.pone.0302552. eCollection 2024.

DOI:10.1371/journal.pone.0302552
PMID:38843161
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11156355/
Abstract

Tardigrades can survive hostile environments such as desiccation by adopting a state of anhydrobiosis. Numerous tardigrade species have been described thus far, and recent genome and transcriptome analyses revealed that several distinct strategies were employed to cope with harsh environments depending on the evolutionary lineages. Detailed analyses at the cellular and subcellular levels are essential to complete these data. In this work, we analyzed a tardigrade species that can withstand rapid dehydration, Ramazzottius varieornatus. Surprisingly, we noted an absence of the anhydrobiotic-specific extracellular structure previously described for the Hypsibius exemplaris species. Both Ramazzottius varieornatus and Hypsibius exemplaris belong to the same evolutionary class of Eutardigrada. Nevertheless, our observations reveal discrepancies in the anhydrobiotic structures correlated with the variation in the anhydrobiotic mechanisms.

摘要

缓步动物可以通过进入一种脱水休眠状态来在干燥等恶劣环境中存活。迄今为止，已经描述了许多缓步动物物种，而最近的基因组和转录组分析表明，根据进化谱系的不同，几种不同的策略被用来应对恶劣环境。在细胞和亚细胞水平上进行详细分析对于完成这些数据至关重要。在这项工作中，我们分析了一种能够快速脱水的缓步动物 Ramazzottius varieornatus。令人惊讶的是，我们没有发现以前在 Hypsibius exemplaris 物种中描述的休眠特异性细胞外结构。Ramazzottius varieornatus 和 Hypsibius exemplaris 都属于 Eutardigrada 的同一个进化类群。然而，我们的观察结果揭示了与休眠机制变化相关的休眠结构的差异。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/77213c9461f1/pone.0302552.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/1e9816429450/pone.0302552.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/7fea293676da/pone.0302552.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/6cd14cde9ceb/pone.0302552.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/c8a9f934e01f/pone.0302552.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/3191b3a4635c/pone.0302552.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/77213c9461f1/pone.0302552.g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/1e9816429450/pone.0302552.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/7fea293676da/pone.0302552.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/6cd14cde9ceb/pone.0302552.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/c8a9f934e01f/pone.0302552.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/3191b3a4635c/pone.0302552.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13c3/11156355/77213c9461f1/pone.0302552.g006.jpg

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Integrative taxonomy reveals new, widely distributed tardigrade species of the genus Paramacrobiotus (Eutardigrada: Macrobiotidae).整合分类学揭示了新的、广泛分布的缓步动物属 Paramacrobiotus 物种（Eutardigrada: Macrobiotidae）。
Sci Rep. 2023 Feb 7;13(1):2196. doi: 10.1038/s41598-023-28714-w.
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The biomedical potential of tardigrade proteins: A review.缓步动物蛋白的生物医学潜力：综述。
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