water and mineral salts transportation in plants
Answers
Answered by
1
Most plants secure the water and minerals they need from their roots.
The path taken is: soil -> roots -> stems -> leaves
The minerals (e.g., K+, Ca2+) travel dissolved in the water (often accompanied by various organic molecules supplied by root cells).
Less than 1% of the water reaching the leaves is used in photosynthesis and plant growth. Most of it is lost in transpiration.
However, transpiration does serve two useful functions:
It provides the force for lifting the water up the stems.
It cools the leaves.
Water and minerals enter the root by separate paths which eventually converge in the stele.
Once in the xylem, water with the minerals that have been deposited in it (as well as occasional organic molecules supplied by the root tissue) move up in the vessels and tracheids.
At any level, the water can leave the xylem and pass laterally to supply the needs of other tissues.
At the leaves, the xylem passes into the petiole and then into the veins of the leaf. Water leaves the finest veins and enters the cells of the spongy and palisade layers. Here some of the water may be used in metabolism, but most is lost in transpiration.
Hope this helps you..
The path taken is: soil -> roots -> stems -> leaves
The minerals (e.g., K+, Ca2+) travel dissolved in the water (often accompanied by various organic molecules supplied by root cells).
Less than 1% of the water reaching the leaves is used in photosynthesis and plant growth. Most of it is lost in transpiration.
However, transpiration does serve two useful functions:
It provides the force for lifting the water up the stems.
It cools the leaves.
Water and minerals enter the root by separate paths which eventually converge in the stele.
Once in the xylem, water with the minerals that have been deposited in it (as well as occasional organic molecules supplied by the root tissue) move up in the vessels and tracheids.
At any level, the water can leave the xylem and pass laterally to supply the needs of other tissues.
At the leaves, the xylem passes into the petiole and then into the veins of the leaf. Water leaves the finest veins and enters the cells of the spongy and palisade layers. Here some of the water may be used in metabolism, but most is lost in transpiration.
Hope this helps you..
Answered by
2
Plants have two transport systems to move food, water and minerals through their roots,steam and leaves. These systems use continuous tubes called xylem and phloem, and together they are known as vascular bundles
Similar questions