“transpiration”的概念、定义、翻译、参考文献-科学参考

transpiration

Biology

The loss of water vapour by plants to the atmosphere. It occurs mainly from the leaves through pores (stomata) whose primary function is gas exchange. The water is replaced by a continuous column of water (and dissolved nutrients) moving upwards from the roots within the xylem vessels. The flow of this column of water is known as the transpiration stream, which is maintained by root pressure and a combination of cohesive and adhesive forces in the xylem vessels according to the cohesion-tension theory (see cohesion). See also potometer.

Geology and Earth Sciences

The removal of moisture from the soil by plant roots, its translocation up the stem to the leaves, and its evaporation through the stomata. The flow of water through the plant is known as the transpiration stream. It reduces leaf temperatures, and is thought to be important for mineral absorption and translocation within plants. The process imposes a number of environmental requirements upon plants; for example, wilting and desiccation result from an insufficient supply of water.

单词	transpiration
释义	transpiration Biology The loss of water vapour by plants to the atmosphere. It occurs mainly from the leaves through pores (stomata) whose primary function is gas exchange. The water is replaced by a continuous column of water (and dissolved nutrients) moving upwards from the roots within the xylem vessels. The flow of this column of water is known as the transpiration stream, which is maintained by root pressure and a combination of cohesive and adhesive forces in the xylem vessels according to the cohesion-tension theory (see cohesion). See also potometer. Geology and Earth Sciences The removal of moisture from the soil by plant roots, its translocation up the stem to the leaves, and its evaporation through the stomata. The flow of water through the plant is known as the transpiration stream. It reduces leaf temperatures, and is thought to be important for mineral absorption and translocation within plants. The process imposes a number of environmental requirements upon plants; for example, wilting and desiccation result from an insufficient supply of water.
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