What are Plasmodesmata?
Plasmodesmata is a term used to describe the junction between two membranes or layers of cells. These membrane layers may be composed of lipids (fats), proteins, carbohydrates, nucleic acids or other molecules.
The term plasmodesmata refers to the junction between two membranes. A plasmon is a charged particle of electromagnetic energy. When it interacts with another such particle, the interaction produces an electric current which causes the second object to emit light. The phenomenon is called plasmode coupling.
Plasmodesmata is for communication between plant cells. The channels allow specific molecules to pass through it. These are gases, ions (charged atoms), and sometimes even very large molecules. For this reason, plasmodesmata allows nearby cells to communicate with each other. The channels are one of the most important parts of the cell walls.
The walls are made up of cellulose, which is a long chain polymer of sugar-based molecules.
Plasmodesmata is involved in the formation of plant vascular tissue. It also allows the transport of materials from one part of a plant to another. One of the most important materials transported through plasmodesmata is water. Since the channels allow for water transportation, they are found in all plant cells, but especially in those that are above the roots. These are the cells that are the most susceptible to drying out, and so they need to be able to quickly take up water from the roots.
The formation of plasmodesmata starts when the plasma membrane invaginates to form a small tube. This small tube continues to grow in a perpendicular manner. As it grows further, the channel becomes wider and flatter. It also starts to develop a second layer of lipid in its interior which is continuous with the cell exterior and interior. This double layer of lipids is known as the lateral lipid membrane, and it lines the inside of the channel.
Eventually, the channel becomes large enough to allow small molecules to pass through its aqueous environment.
Plasmodesmata has been known to play an important role in several plant diseases. For example, the pathogenic fungus called leaf roll causes a disease in tobacco plants. The disease is spread through plasmodesmata, which allows the fungus to spread throughout the plant.
Protoplasm is the contents found inside a cell excluding the cell membrane. Protoplasm mostly contains cytoplasm and the cell’s nucleus. Other contents may also be found in the cell such as mitochondria, chloroplasts, and vacuoles.
Protoplasm is also known as protoplasm. The term originated from a combination of the two words pro and tissue. It is the first used scientific term for the material inside an organism. The word was first used by the German anatomist Franz Leydig in 1848.
This content has been derived from Public Domain Sources of Information.
Sources & references used in this article:
- Plasmodesmata (AW Robards, WJ Lucas – Annual review of plant biology, 1990 – annualreviews.org)
- Actin associated with plasmodesmata (RG White, K Badelt, RL Overall, M Vesk – Protoplasma, 1994 – Springer)
- Substructure of freeze-substituted plasmodesmata (B Ding, R Turgeon, MV Parthasarathy – Protoplasma, 1992 – Springer)
- Phloem loading and plasmodesmata (R Turgeon – Trends in Plant Science, 1996 – Elsevier)
- Selective trafficking of KNOTTED1 homeodomain protein and its mRNA through plasmodesmata (WJ Lucas, S Bouché-Pillon, DP Jackson… – …, 1995 – science.sciencemag.org)
- Callose deposition at plasmodesmata (JE Radford, M Vesk, RL Overall – Protoplasma, 1998 – Springer)
- Plasmodesmata in higher plants (AW Robards – … communication in plants: studies on plasmodesmata, 1976 – Springer)