关键词: 水稻, 根系, 光合速率, 气孔导度, 蒸腾速率

Abstract: In order to promulgate between the root system and the leaf photosynthesis characteristic contacts, The effects of wiping out roots on rice leaf photosynthetic rate and stomatal conductance and transpiration rate were studied with rice seedling solution experiments. The result indicates that the first leaf photosynthesis rate and stomatal conductance and transpiration rate of wiping out upper root is decreased immediately by 10.25, 53.99% and 46.26% respectively. When wiping out one half root system, the photosynthesis rate of the first and second leaf decreased immediately by 0.053% and 8.51%, the stomatal conductance decreased immediately by 24.03% and 35.80%, the transpiration rate decreased immediately by 21.22% and 30.93%; When further wiping out surplus complete root system, the photosynthesis rate of the first and second leaf decreased immediately by 12.57% and 17.22%, the stomatal conductance decreased immediately by 55.86% and 61.84%, the transpiration rate decreased immediately by 50.96% and 55.96%.The root system and the leaf photosynthesis characteristic exists closely direct relation。

Key words: Rice, Root, Photosynthetic rate, Stomatal conductance Transpiration rate