【摘要】 【目的】揭示水稻根系与叶片光合特性之间的联系。【方法】在水培条件下以水稻幼苗为材料,研究不同剪根方式对水稻叶片光合速率、气孔导度和蒸腾速率的影响效应。【结果】剪除全部根系后,顶一叶叶片的光合速率、气孔导度和蒸腾速率分别立即平均下降10.25%、53.99%和46.26%。剪除一半根系时,顶一、二叶的光合速率比断根前分别下降0.05%和8.51%,气孔导度分别下降24.03%和35.80%,蒸腾速率分别下降21.22%和30.93%;进一步剪除剩余全部根系时,顶一、二叶的光合速率比断根前分别下降12.57%和17.22%,气孔导度分别下降55.86%和61.84%,蒸腾速率分别下降50.96%、55.96%。【结论】根系与地上部叶片光合特性间存在密切的直接关系。更多还原

【Abstract】 【Objective】In order to promulgate between the root system and the leaf photosynthesis characteristic contacts, 【Method】the effects of wiping out roots on rice leaf photosynthetic rate and stomatal conductance and transpiration rate were studied with rice seedling solution experiments. 【Result】The results indicated that the first leaf photosynthesis rate and stomatal conductance and transpiration rate of wiping out upper root were decreased immediately by 10.25%, 53.99% and 46.26% respectively. When wiping out half root, the photosynthesis rate of the first and second leaves decreased immediately by 0.05% and 8.51%. The stomatal conductance decreased immediately by 24.03% and 35.80%,and the transpiration rate decreased immediately by 21.22% and 30.93%. When further wiping out surplus complete root , the photosynthesis rate of the first and second leaves 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%. 【Conclusion】There is a direct relationship between the root system and the leaf photosynthesis.更多还原