Pre-fertilization degeneration of both synergids in Brassica campestris ovules.
Pre-fertilization degeneration of both synergids in Brassica campestris ovules.
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DOI：
10.1007/bf00189154
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发表时间：
1988-01-01
影响因子：
--
通讯作者：
Van Went, J.
中科院分区：
文献类型：
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作者：
Went, J. van;Cresti, M.;Van Went, J.
在B。campestris中，胚珠的两个助细胞在花粉管到达之前退化。这并不取决于授粉。在非退化阶段，助细胞完全充满了一个复杂的组织细胞质，含有大量的线粒体，许多嵴，许多网质体和相关的小泡，和一个非常广泛的粗面内质网。发生在细胞质中的助细胞的退行性变化的特点是损失的可见性的膜的内质网和致密的沉积物的线粒体周围的膜上的同时形成。在局部，助细胞质膜消失，部分助细胞的磨碎的细胞质渗入卵细胞和中央细胞质膜之间的空隙。
In B. campestris, both synergids of the ovule degenerate before the arrival of the pollen tube. This does not depend on pollination. At the non-degenerated stage, the synergids were completely filled with a complexly organized cytoplasm containing numerous mitochondria with many cristae, many dictyosomes and associated vesicles, and a very extensive rough endoplasmic reticulum. The degenerative changes that occurred in the cytoplasm of the synergids were characterized by a loss of visibility of the membranes of the endoplasmic reticulum and the simultaneous formation of dense deposits on the surrounding membranes of the mitochondria. Locally, the plasma membranes of the synergids disappeared, and some ground plasma of the synergids penetrated into the space between the plasma membranes of the egg cell and the central cell.