植物体吸收水分,是由根毛从土壤中吸进根内,再通过根、茎、叶的导管输送到叶肉细胞的(图1)。这些水分只有小部分(约1%～5%)参与植物体内各项生命活动,其余大部分通过蒸腾方式而散失到体外。那么,我们怎样知道植物水分的蒸腾作用?蒸腾作用的进行又受哪些因素的影响呢?下面我们来 The plant body absorbs water, which is sucked into the root from the soil by the root hairs and then transported to the mesophyll cells through the conduits of the roots, stems and leaves (Fig. 1). Only a small part (about 1% to 5%) of these waters participate in various life activities in the plant, and most of the rest is lost to the body through transpiration. So, how do we know the transpiration of plant water and what factors influence the transpiration? Here we come