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盘基网柄菌中的前样细胞在发育过程中孢子提升时是必需的。

The anterior-like cells in Dictyostelium are required for the elevation of the spores during culmination.

作者信息

Sternfeld J

机构信息

Department of Biological Sciences, State University of New York at Cortland, Cortland, NY 13045, USA.

出版信息

Dev Genes Evol. 1998 Nov;208(9):487-94. doi: 10.1007/s004270050207.

Abstract

Shortly after initiation of Dictyostelium fruiting body formation, prespore cells begin to differentiate into non-motile spores. Although these cells lose their ability to move, they are, nevertheless, elevated to the tip of the stalk. Removal of the amoeboid anterior-like cells, located above the differentiating spores in the developing fruiting body, prevents further spore elevation although the stalk continues to elongate. Furthermore, replacement of the anterior-like cells with anterior-like cells from another fruiting body largely restores the ability to lift the spores to the top of the stalk. However, if amoeboid prestalk cells are used to replace the anterior-like cells, there is no restoration of spore elevation. Finally, when a droplet of mineral oil replaces differentiating spores, it is treated as are the spores: the mineral oil is elevated in the presence of anterior-like cells and becomes arrested on the stalk in the absence of anterior-like cells. Because a similar droplet of mineral oil is totally ignored by slug tissue, it appears that there is a dramatic transformation in the treatment of non-motile matter at this point in Dictyostelium development.

摘要

在盘基网柄菌子实体形成开始后不久,前孢子细胞开始分化为不能运动的孢子。尽管这些细胞失去了运动能力,但它们仍会被提升到柄的顶端。去除发育中的子实体中位于分化孢子上方的类变形虫前体细胞,尽管柄继续伸长,但会阻止孢子进一步提升。此外,用来自另一个子实体的类前体细胞替换类前体细胞,很大程度上恢复了将孢子提升到柄顶端的能力。然而,如果用变形虫状的前柄细胞来替换类前体细胞,则孢子提升能力无法恢复。最后,当一滴矿物油替代分化中的孢子时,它会像孢子一样被对待:在类前体细胞存在的情况下,矿物油会被提升,而在没有类前体细胞的情况下,矿物油会停留在柄上。因为类似的一滴矿物油会被蛞蝓组织完全忽略,所以在盘基网柄菌发育的这个阶段,对于不能运动的物质的处理似乎发生了巨大的转变。

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