Question

What are the factors influencing transpiration? How is it useful to plants?

Answer 1

In tall trees, water rises with the help of the transpirational pull generated by transpiration or loss of water from the stomatal pores of leaves. This is called the cohesion-tension model of water transport. During daytime, the water lost through transpiration (by the leaves to the surroundings) causes the guard cells and other epidermal cells to become flaccid. They in turn take water from the xylem. This creates a negative pressure or tension in the xylem vessels, from the surfaces of the leaves to the tips of the roots, through the stem. As a result, the water present in the xylem is pulled as a single column from the stem. The cohesion and adhesion forces of the water molecules and the cell walls of the xylem vessels prevent the water column from splitting.
In plants, transpiration is driven by several environmental and physiological factors. The external factors affecting transpiration are wind, speed, light, humidity, and temperature. The plant factors affecting transpiration are canopy structure, number and distribution of stomata, water status of plants, and number of open stomata. Although transpiration causes water loss, the transpirational pull helps water rise in the stems of plants. This helps in the absorption and transport of minerals from the soil to the various plant parts. Transpiration has a cooling effect on plants. It helps maintain plant shape and structure by keeping the cells turgid. Transpiration also provides water for photosynthesis.

Answer 2

Answer:

Factors influencing transpiration are 1 water avalability of soil  2 leaf surface area 3 light 4 temperature 5 wind

Explanation:

Soil water lebel The rate of transpiration depends on soil water lebel. If the soil water level is high then the transpiration rate is also high and low lebel of soil water reduces the transpiration rate

Light   light influence the opening of stomata there by increasing the rate of transpiration.

Temperature Transpiration helps i cooling of plant body so it can be demonstrated that at high temperature transpiration rate is increased

Wind   wind  also regulates the rate of transpiration.The humidity increases when there is no wind thereby decreasing the transpiration rate .The present of breeze pushes the humid air and replace with dry air.

Leaf surface area leaf surface area is directly proportional to the transpiration rate .