The ER Within Plasmodesmata

The ER Within Plasmodesmata
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胞间连丝内的 ER

DOI:
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
K. Oparka
K. Oparka
中科院分区:
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文献类型:
--
作者:
K. Wright;K. Oparka

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内质网(ER)是胞间连丝的重要组成部分,胞间连丝是连接植物细胞的膜排列孔。穿过胞浆连丝中心的胞丝小管由皮质内质网形成并与之相连。虽然内质网的确切作用现在才被表征,但人们认识到内质网密切参与分子向胞间连丝的转移,并通过胞间连丝,为细胞间的运动提供了许多途径,并涉及控制运输的机制。据信,分子的运输可能是通过在动小管内的被动流动,沿着内动小管膜的扩散,或通过特定的附着在动小管的细胞质表面,然后通过细胞质套筒进行便利的运输。内质网也参与胞间连丝的形成,无论是在细胞分裂期间还是在非分裂壁重新形成时。本章主要讨论内质网在胞间连丝形成和功能中的作用。
The endoplasmic reticulum (ER) is an essential component of plasmodesmata, the membrane-lined poresthat interconnect plant cells. The desmotubule which traverses the centre of a plasmodesma is formedfrom, and continuous with, the cortical ER. Whilst the exact role of the ER is only now being characterised,it is recognised that the ER is intimately involved in the transfer of molecules to and through plasmodesmata,providing a number of pathways for movement between cells as well as being implicated in the mechanismsthat control transport. It is believed that molecules may be transported by passive flow within the desmotubulelumen, by diffusion along the inner desmotubule membranes or by specific attachment to the cytoplasmic faceof the desmotubule followed by facilitated transport through the cytoplasmic sleeve. The ER is also involvedin the formation of plasmodesmata either during cell division or when formed de novo across non-divisionwalls. This chapter focusses on the role of the ER in plasmodesmatal formation and function.
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