Question

explain the mechanism of (1) root pressure (2)translocation class 10 plz ans me ​

Answer 1

Answer:

1.Root pressure is caused by active distribution of mineral nutrient ions into the root xylem. Without transpiration to carry the ions up the stem, they accumulate in the root xylem and lower the water potential. Water then diffuses from the soil into the root xylem due to osmosis.

2.Translocation is the movement of materials in plants from the leaves to other parts of the plant.The entrance of the water causes pressure to build and forces the water and dissolved materials to move through the phloem from the leaves into the rest of the plant, where it can be stored or turned into energy.

Answer 2

Root Pressure-It is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. Root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when transpiration is low during the day.

Translocation -Transport of soluble product of photosynthesis or food from leaves to other parts of plants is called translocation. For translocation, food molecules enter the part of the phloem called the sieve tubes where they can be transported upwards or downwards to all parts of the plant including roots.