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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Comparative exine ontogeny in some members of the family Zygophyllaceae sensu lato
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Comparative exine ontogeny in some members of the family Zygophyllaceae sensu lato

机译：Zygophyllaceaae sensu lato家族某些成员的外生比较个体发育

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摘要

Exine ontogeny is studied in five taxa of the family Zygophyllaceae sensu lato (Peganum harmala L., Zygophyllum album L., Fagonia cretica L., Tribulus terrestris L., and Nitraria retusa [Forsk.] Asch.). In the beginning of the tetrad stage, the plasmalemma is attached to the callose wall, except in T. terrestris, where it describes crests and hollows. The primexine matrix is fibrillar, bilayered in T. terrestris and unilayered in the other taxa. In all species except P. harmala, the procolumellae are heterogeneous with clear zones and they become compact later. In T. terrestris, they are built on the crests. In Z. album and T. terrestris, a primordial nexinic lamella is set up. It is tripartite with a white line seen at some levels; on its external leaflet, the foot layer is observed, and on its internal leaflet, there is the endexine with numerous lamellae. This white line disappears often in the mature exine. In T. terrestris, there is a thick nexine that is coarsely lamellate inside. In the aperture zone, the columellae are lacking, the tectum and the foot layer get thinner; they unite and form the apertural membrane with the external part of the endexine. There is a granulolamellar endexinic zone well developed in P. harmala, whereas it is threelayered and weakly developed in T. terrestris.
机译：外生子体在五种Zygophyllaceae sensu lato（Peganum harmala L.，Zygophyllum album L.，Fagonia cretica L.，Tribulus terrestris L.和Nitraria retusa [Forsk。] Asch。）的五个分类单元中进行研究。在四肢阶段的开始，质膜附着在the壁上，除了在T. terrestris中，它描述了波峰和凹陷。初生素基质是纤维状的，在T. terrestris中双层，在另一类中单层。在除P. harmala以外的所有物种中，前小球虫均是异质的，具有清晰的区域，后来它们变得紧凑。在T. terrestris中，它们建在山顶上。在Z. album和T. terrestris中，建立了原始的神经性薄片。它是三方的，在一定程度上可见白线。在其外部小叶上观察到足层，在其内部小叶上观察到具有大量薄片的内啡肽。这条白线经常在成熟的外壁消失。在T. terrestris中，有一个浓厚的nexine，其内部大致呈层状。在小孔区域，缺少小柱，顶盖和足底层变薄。它们结合并与endexine的外部形成孔膜。在P. harmala中有一个发达的颗粒状层状内分泌区，而在T. terrestris中则是三层且发育较弱。

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