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被囊类动物的卵子利用氨离子来实现漂浮。

Tunicate eggs utilize ammonium ions for flotation.

出版信息

Science. 1978 Apr 7;200(4337):64-5. doi: 10.1126/science.200.4337.64.

DOI:10.1126/science.200.4337.64
PMID:17847330
Abstract

Unlike most solitary ascidians, Corella willmeriana retains its eggs and embryos well past hatching. The early stages float to the top of the enlarged atrium from which they cannot escape. Ammonium ions replace other more dense substances in the cell sap of the float cells surrounding the embryo. Energy derived from glycolysis but not mitochondrial processes supports this process.

摘要

与大多数独居的海鞘不同,威氏拟海鞘很好地保留了它的卵子和胚胎,直到孵化。早期胚胎会从扩大的心房浮到顶部,而它们无法从中逃脱。氨离子取代了围绕胚胎的浮质细胞中其他更密集的物质。这个过程由糖酵解而不是线粒体过程提供能量。

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引用本文的文献

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Cells. 2022 Jul 1;11(13):2096. doi: 10.3390/cells11132096.
2
Dicapryloylglycerol and ammonium ions induce metamorphosis of ascidian larvae.二辛酰甘油和铵离子诱导海鞘幼虫变态。
Rouxs Arch Dev Biol. 1990 May;198(7):430-432. doi: 10.1007/BF00376162.
3
Self and non-self recognition between gametes of the ascidian,Halocynthia roretzi.海鞘(柄海鞘)配子之间的自我与非自我识别。
Wilehm Roux Arch Dev Biol. 1983 Nov;192(6):347-352. doi: 10.1007/BF00848815.
4
Ascidian larval tunic: Extraembryonic structures influence morphogenesis.海鞘幼虫被囊:胚外结构影响形态发生。
Cell Tissue Res. 1982;222(3):547-62. doi: 10.1007/BF00213854.
5
Messenger RNA in the cytoskeletal framework: analysis by in situ hybridization.细胞骨架框架中的信使核糖核酸:原位杂交分析
J Cell Biol. 1982 Oct;95(1):1-7. doi: 10.1083/jcb.95.1.1.