Question

What is the relationship between transpiration and water intake?

Answer 1

what do you know about transpiration?

Answer 2

Q1: Why does transpiration and absorption in plants slow down during the night?

A1: Generally, whenever there is transpiration, there will be absorption of water. During the daytime, plants evaporate water (i.e. technically called transpiration) to keep their surfaces cool---i.e. to withstand the heat. This will be done with the help of special cell in the epidermis called "stomata" (singular: stoma)---they will be open during day time. There will be slow down (or sometimes absent) of transpiration during nighttime, as the stomata are closed during nighttime.


Q2: What is the relationship between transpiration and absorption and the amount of water in a leaf?

A2: Human beings (animals and birds too!) drink water whenever they feel thirsty. Some of the water will be used up by the metabolic activities; some amount of water will be evaporated through the pores in the skin (as "sweats") of human beings (especially during sunny day or while they do heavy workouts) ; however, the remaining water (along with the waste excretions) will be excreted as urine. When the level of water decreases in the body (because of the above-mentioned activities), they will drink water again. Like that, when water is transpired by the plants, to meet the level of water in the plant cells, the roots will absorb water from ground and transport it to all the parts of the plants that require water (for example, to leaves for photosynthesis, to other cells for metabolic activities, etc.)

I hope, it would be clear to you now!