Plants rarely achieve their full photosyntheticpotential, due to water shortage and to variation in the intensity of radiation.
植物很难获得它们完全的光合作用潜能，是由于水短缺和辐射强度的改变。
2
The net photosynthetic rate was in accord with both stomatal conductance and water potential.
净光合率的提高与气孔导度及水势的提高有一致趋势。
3
The photosynthetic rate of the leaves declined with the decrease of soil water potential, but drought-resistant varieties reduced less than drought-sensitive ones.