Plasmodesmata of brown algae.
Plasmodesmata of brown algae.
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DOI：
10.1007/s10265-014-0677-4
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发表时间：
2015-01
影响因子：
2.8
通讯作者：
Motomura, Taizo
中科院分区：
文献类型：
--
作者：
Terauchi, Makoto;Nagasato, Chikako;Motomura, Taizo
胞间连丝（Plasmodesmata，PD）是植物细胞间的连接组织，在植物的各种发育过程中发挥重要作用。它们也存在于褐藻（一组具有复杂多细胞结构的真核生物）和绿色植物中。最近，我们进行了超微结构的研究，PD在几种褐藻。褐藻中的PD通常是直径为10-20 nm的直的质膜内衬通道，并且与绿色植物相比，它们缺乏桥粒微管。此外，在褐藻中没有观察到分支PD。在棕网藻（Dictyota dichotoma）中，PD在胞质分裂期间通过形成其前体结构（前胞间连丝，PPD）而产生。在几个物种中，具有复杂的多细胞叶状体结构，但不是在那些具有uniseriate丝状或multiseriate一个被称为“坑场”的结构中的PD聚类。纹孔场可能控制细胞间的通讯，并有助于复杂多细胞叶状体的建立。在这篇综述中，我们讨论了褐藻PD的基本形态学方面，目前的问题仍然开放。
Plasmodesmata (PD) are intercellular connections in plants which play roles in various developmental processes. They are also found in brown algae, a group of eukaryotes possessing complex multicellularity, as well as green plants. Recently, we conducted an ultrastructural study of PD in several species of brown algae. PD in brown algae are commonly straight plasma membrane-lined channels with a diameter of 10–20 nm and they lack desmotubule in contrast to green plants. Moreover, branched PD could not be observed in brown algae. In the brown alga, Dictyota dichotoma, PD are produced during cytokinesis through the formation of their precursor structures (pre-plasmodesmata, PPD). Clustering of PD in a structure termed “pit field” was recognized in several species having a complex multicellular thallus structure but not in those having uniseriate filamentous or multiseriate one. The pit fields might control cell-to-cell communication and contribute to the establishment of the complex multicellular thallus. In this review, we discuss fundamental morphological aspects of brown algal PD and present questions that remain open.
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