DENDROLOGY

Detailed explanation-1: -Plants transpire more rapidly at higher temperatures because water evaporates more rapidly as the temperature rises. At 30°C, a leaf may transpire three times as fast as it does at 20°C. The rate of diffusion of any substance increases as the difference in concentration of the substances in the two regions increases.

Detailed explanation-2: -When temperature increases, the viscosity of water declines and mesophyll conductance (gm) increases, which may improve the supply of water to sites of evaporation and thus increase stomatal aperture (Cochard et al., 2000; von Caemmerer and Evans, 2015).

Detailed explanation-3: -As the temperature increases, the water molecules gain more energy. This means they move around more and therefore they evaporate and diffuse out of the leaf faster. This is why the rate of transpiration increases as the temperature increases.

Detailed explanation-4: -Transpiration is affected by temperature. As temperature increases, so does the rate of transpiration as the water particles gain more energy to diffuse into the plant evaporate out of the stomata. Transpiration is affected by humidity.

Detailed explanation-5: -Transpiration is the loss of water from the plant through evaporation at the leaf surface. It is the main driver of water movement in the xylem. Transpiration is caused by the evaporation of water at the leaf–atmosphere interface; it creates negative pressure (tension) equivalent to –2 MPa at the leaf surface.