2019年10月4日 · Transpiration is the evaporation of water from plants. Most of the water absorbed by the roots of a plant—as much as 99.5 percent—is not used for growth or metabolism; it is excess water, and it leaves the plant through transpiration.

6 天之前 · transpiration, in botany, a plant’s loss of water, mainly through the stomata of leaves. Stomatal openings are necessary to admit carbon dioxide to the leaf interior and to allow oxygen to escape during photosynthesis.

Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. It is a passive process that requires no energy expense by the plant. [1] Transpiration also cools plants, changes osmotic pressure of cells, and enables mass flow of mineral nutrients.

2022年7月31日 · 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.

2022年5月15日 · Transpiration is the evaporation of water from plants. It occurs chiefly at the leaves while their stomata are open for the passage of CO 2 and O 2 during photosynthesis. But air that is not fully saturated with water vapor (100% relative humidity) will dry the surfaces of cells with which it comes in contact.

Transpiration refers to the loss of water vapor through plant stomata, mainly in the leaves. Hot, dry, and windy conditions increase transpiration rate.

2023年2月17日 · Transpiration is the biological process by which water is released in the air as water vapor through minute pores called stomata. It occurs through the aerial parts of the plant, such as leaves, stems, and flowers. It happens during daytime when leaves absorb sunlight and get heated up causing water to evaporate from its surface.

2024年11月4日 · What is transpiration in biology? In biology, transpiration is a physiological process in plants where water is absorbed from the soil, transported through the plant's vascular system, and released as water vapor into the atmosphere.

2024年12月11日 · The loss of water vapour from the leaves of plants (transpiration) results in a lower water potential in the leaves. This creates a concentration gradient between the roots and leaves and causes water to move upwards.

Transpiration in higher plants accounts for about three-quarters of the water that is vaporized at the global land surface and one-eighth of that vaporized over the entire globe. The availability of water is one of the major factors restricting terrestrial plant production on a global scale.