Oparka K J
Department of Cellular and Environmental Physiology, Scottish Crop Research Institute, Invergowrie, Dundee, UK.
Semin Cell Biol. 1993 Apr;4(2):131-8. doi: 10.1006/scel.1993.1016.
This review considers recent studies on the role of plasmodesmata in the conduction of small solutes and signalling molecules between plant cells. The substructure of plasmodesmata is described in relation to the potential pathways available for symplastic signalling between cells. At least two discrete pathways are available for transport through plasmodesmata, the cytoplasmic sleeve between the desmotubule and the plasmalemma, and the endoplasmic reticulum which connects contiguous cells via the central desmotubule. This latter pathway has been shown recently to function as a dynamic continuum for the movement of lipids and lipid-signalling molecules between plant cells. The role of plasmodesmata in the conduction of hormones and electrical signals is also considered, as is the potential for movement of macromolecular signalling molecules via the symplast. The factors which regulate plasmodesmatal conductance and the significance of symplast 'domains' are discussed in relation to the control of movement of signalling molecules in the symplast.
本综述探讨了关于胞间连丝在植物细胞间小分子溶质和信号分子传导中作用的近期研究。描述了胞间连丝的亚结构与细胞间共质体信号传导可用的潜在途径的关系。至少有两条离散的途径可用于通过胞间连丝进行运输，即连丝微管和质膜之间的细胞质袖，以及通过中央连丝微管连接相邻细胞的内质网。最近已证明后一种途径作为脂质和脂质信号分子在植物细胞间移动的动态连续体发挥作用。还考虑了胞间连丝在激素和电信号传导中的作用，以及大分子信号分子通过共质体移动的可能性。讨论了调节胞间连丝通透性的因素以及共质体“区域”对于共质体中信号分子移动控制的意义。
