- Plasmodesmata are protoplasmic strand that connect the protoplast of neighboring cells.
- Diameter is 40-50nm.
- Easily seen in endosperm of seeds such as phaenix, Aesculus, Diospyros and in cotyledons of some plants.
STRUCTURE OF PLASMODESMATA
- Plasmodesmata is lined by plasma membrane.
- It encloses tubular extensions of endoplasmic reticulum called desmotubule.
- The space between desmotubule and plasma membrane contain 8-10 micro channels.
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| structure of plasmodesmata |
CLASSIFICATION OF PLASMODESMATA
- ON THE BASIS OF ORIGIN
Primary plasmodesmata
Secondary plasmodesmata
- ON THE BASIS OF BRANCHING
Branched plasmodesmata
Unbranched plasmodesmata
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| Source Wikipedia |
FUNCTION OF PLASMODESMATA
- Transport of materials and relay of stimuli.
- Regulate traffic of molecule between cells.
- Important role during development of organelle.
- Involved in short distance movement of viruses.
