蒸腾作用对植物的生命活动有重大意义,第一,蒸腾作用是根吸收水分与转运水分的一个主要动力。第二,根吸收的矿物质,主要是随蒸腾液流上升的,故对矿质元素在植物体内的运转有利。第三,在蒸腾过程中,水由液体状态变为气体,要消耗很多热量,从而降低叶的表面温度,使叶免受强光的灼伤。 Transpiration is of great importance to the life and activity of plants. First, transpiration is a major driving force for root absorption and transport of water. Second, the minerals absorbed by the root, mainly with the rising transpiration flow, are beneficial to the operation of mineral elements in the plant body. Third, during the transpiration, the water turns from a liquid state to a gas, consuming a lot of heat, thereby lowering the surface temperature of the leaves and preventing the leaves from being burned by bright light.