plasmodesmatal desmotubule
A tightly wound cylinder of membrane that is located within the plasmodesmal pore and runs the length of the plasmodesma. The desmotubule likely provides a rigid stability to plasmodesmata and confers a fixed diameter and pore size to the plasmodesmal canal, and is linked to the endoplasmic reticulum in each of the adjacent cell.
GO:0110165
cellular anatomical structure
is_a
GO:0005783
endoplasmic reticulum
part_of
GO:0005886
plasma membrane
part_of
GO:0009506
plasmodesma
part_of
desmotubule central rod
related