plants have no circulatory system?then how cells manage intercellular transport
Answers
Plants have no circulatory system yet they manage to circulate water and minerals for their needs with the help of special tissues.
Transportation of water takes place through the process of diffusion and osmosis, which depend upon the gradient.
Diffusion - when the molecule move from high concentration to low concentration in random direction for short distance.
Osmosis - When the molecules move from its region of higher chemical potential to its region of lower chemical potential.
Imbibition- It is special type of diffusion when water is absorbed by solids colloid and causing them increase in size or volume. eg: absoption of water by seeds.
Intracellular transport by apoplast pathway and symplast pathway in the adjacent cells or plasmodesmata.
Uptake of mineral ions and water through phloem and xylem {specialised tissue) . Flow through xylem is is unidirectional ,upward while that of phyloem is bi- directional, upward and downward.
The vascular tissues and vesicles in the plant perform the conduction of nutrients, enzymes and water to various parts and cells of the plant.
Explanation:
Intercellular transport in plants takes place by vesicles which are storage of food for cells. The vesicles bind to target membrane and move in right direction with the help of motor proteins. They are highly specific in nature.
Vascular tissues uses suction pressure to transport nutrients and food to other parts in plants.
The conducting tissues in the plant is formed from xylem and phloem.
Xylem is one of the vascular tissue that is present in stem of the plant. It helps in conduction of dissolved substances from the root hairs to the upward plant part.
Phloem is also a vascular tissue that helps in transport of food to other parts.
Intercellular diffusion in plants occur by diffusion, transpiration and osmosis.
The water transport occurs by osmosis to neighboring cells according to difference in osmotic concentration of the cells.
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