中国农业科学 ›› 2007, Vol. 40 ›› Issue (5): 1064-1068 .

• 研究简报 • 上一篇    下一篇

水稻根系与叶片光合特性的关系

赵全志,乔江方,刘 辉,田志强   

  1. 河南农业大学/河南省作物生长发育调控重点实验室
  • 收稿日期:2005-10-23 修回日期:2005-11-10 出版日期:2007-05-10 发布日期:2007-05-10
  • 通讯作者: 赵全志

Relationship between Root and Leaf Photosynthetic Characteristic in Rice

  

  1. 河南农业大学/河南省作物生长发育调控重点实验室
  • Received:2005-10-23 Revised:2005-11-10 Online:2007-05-10 Published:2007-05-10

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。

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