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胞间连丝是植物细胞间物质运输和信息传递的直接通道,对植物的生长与发育,以及植物对环境的反应与适应等诸多方面起着十分重要的作用,是当今细胞生物学中最活跃的研究领域之一。本研究揭示,在小麦幼叶组织细胞壁中存在着胞间连丝的多样性,其中至少有4种类型:(1)具有压缩内质网(ER,中央桥管)的直形通道的胞间连丝;(2)“颈型”胞间连丝,即包含ER的胞间连丝的两端发生收缩,显示一种“颈”现象,甚至在中段形成一种“腹部”现象;(3)分枝型的胞间连丝,包含压缩ER;(4)令人感兴趣的是观察到一种不具中央桥管(不含ER),仅为质膜包围的简单的胞间连丝。这一观察证实,包含ER的胞间连丝不是高等植物的唯一结构类型。这种不具ER的简单胞间连丝对于大分子物质的运输,特别是原生质、染色质及细胞核的胞间迁移,可能是一种更有效的通道。
Interstitial filaments is a direct channel for material transport and information transmission between plant cells and plays a very important role in plant growth and development as well as plant response to and adaptation to the environment and is thus the most active in cell biology One of the areas of research. This study revealed that there are at least four types of intercellular filaments in the cell wall of young leaves of wheat: (1) the intercellular spaces of the straight channels with the compressed endoplasmic reticulum (ER, central bridge) (2) “Cervical” interplasia, the contraction of the interphalangeal filaments containing the ER, shows a “cervical” phenomenon and even forms a “belly” in the middle (3) Branched interplasias, containing compressed ERs; (4) Interestingly observed was a simple, non-central (without ER) tube surrounded by a plasma membrane The cell line. This observation confirms that the presence of ER-containing plasmodesma is not the only structural type of higher plants. This non-ER-based simple interplasia silk may be a more effective channel for the transport of macromolecules, especially the interstitial migration of protoplasm, chromatin and nucleus.