Increase of internal ion concentration triggers trehalose synthesis associated with cryptobiosis in larvae of Polypedilum vanderplanki
Increase of internal ion concentration triggers trehalose synthesis associated with cryptobiosis in larvae of Polypedilum vanderplanki
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DOI：
10.1242/jeb.00418
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发表时间：
2003-07-01
影响因子：
2.8
通讯作者：
Okuda, T
中科院分区：
文献类型：
--
作者：
Watanabe, M;Kikawada, T;Okuda, T
一种生活在临时岩石池中的非洲摇蚊幼虫，Polypedilum vanderplanki，在池干涸时完全脱水，并经历脱水生活，直到下一场雨到来。在脱水过程中，幼虫积累了大量的海藻糖，由于其高的水分置换和玻璃化能力，海藻糖提供了有效的保护。由于海藻糖快速合成的发生与身体水分的损失一致，因此认为体内渗透压的变化是海藻糖合成的一个提示。事实上，即使没有干燥处理，暴露于高盐度也会触发海藻糖的快速有效积累。由于这种快速生产主要发生在高浓度的盐溶液中，我们得出结论，内部离子浓度的增加触发海藻糖的合成与隐生物在这个物种。
Larvae of an African chironomid, Polypedilum vanderplanki, which live in temporal rock pools, are completely dehydrated when the pools dry up and undergo anhydrobiosis until the next rain comes. During the dehydration process, larvae accumulate large amounts of trehalose, which provides effective protection against desiccation because of its high capacity for water replacement and vitrification. As the occurrence of rapid trehalose synthesis coincides with loss of body water, changes of osmolarity in the body are thought to be a cue for trehalose synthesis. Indeed, exposure to high salinity triggers rapid and efficient accumulation of trehalose even without desiccation treatment. As this rapid production occurs mainly in high concentrations of salt solutions, we conclude that an increase in internal ion concentration triggers trehalose synthesis associated with cryptobiosis in this species.