Abstract
Chara tomentosa antheridial plasmodesmata are described during proliferation and spermiogenesis. In antheridial filament cells which are cycling completely synchronously, unplugged plasmodesmata are filled with light cytoplasm. The same plasmodesmata are observed after cessation of mitotic division followed by the onset of synchronous spermiogenesis. Walls separating cells at different cell cycle stages and dividing antheridial filaments into asynchronous domains are plugged with a dense osmophilic substance. Similarly plugged plasmodesmata are present between antheridial cells of different types, e.g., capitular cells and antheridial filaments. In mid spermiogenesis when abundant endoplasmic reticulum (ER) appears temporarily it penetrates into plasmodesmata enabling cell-to-cell transport via ER cisternae. In late spermiogenesis there are no cisternae in plasmodesmata.
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Kwiatkowska, M., Popłońska, K. & Wojtczak, A. Chara tomentosa Antheridial Plasmodesmata at Various Stages of Spermatogenesis. Biologia Plantarum 46, 233–238 (2003). https://doi.org/10.1023/A:1022802711225
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DOI: https://doi.org/10.1023/A:1022802711225