HORTICULTURE

Detailed explanation-1: -Water uptake by root hairs reduces the direct flow of water through the soil into the root epidermis, softening the gradients in water pressure that are expected to develop when transpiration is high and the soil is becoming dry and less hydraulically conductive.

Detailed explanation-2: -In contrast, relatively longer root hairs (i.e. barley) had a clear influence on root water uptake, transpiration, and hence plant response to soil drying. We conclude that the role of root hairs in water uptake is species (and probably soil) specific.

Detailed explanation-3: -The transpiration rate goes up as the temperature goes up, especially during the growing season. As the relative humidity of the air surrounding the plant rises the transpiration rate decreases. It is easier for water to evaporate into dryer air than into more saturated air.

Detailed explanation-4: -Transpiration is a process that involves loss of water vapour through the stomata of plants. The loss of water vapour from the plant cools the plant down when the weather is very hot, and water from the stem and roots moves upwards or is ‘pulled’ into the leaves.