《植物生理学报》 2011, 47(8): 817-820
通信作者:王庆江;E-mail: qingjiang@163.com;Tel: 0310-8576726
摘 要:
通过同时测定葡萄木质部导管液流平均流量和流速, 应用变形的哈根-泊萧叶方程, 研究了测定葡萄木质部压力梯度 的新方法。结果表明, 在直径分别为7 mm的葡萄茎段和4 mm的葡萄叶柄上, 用此新方法测得的木质部压力梯度与实际加 在其上的压力梯度吻合的很好, 说明此新方法可用于连续、实时测定葡萄木质部压力梯度。用此新方法在离体葡萄枝上 测定发现, 随光照强度增强, 其木质部压力梯度成线性正相关增加。关键词:葡萄; 流量; 流速; 哈根-泊萧叶方程; 木质部压力梯度
收稿:2011-03-21 修定:2011-06-30
Corresponding author: WANG Qing-Jiang; E-mail: qingjiang@163.com; Tel: 0310-8576726
Abstract:
A new method for measurement of xylem pressure gradient of grape was studied by simultaneously measuring the average flow rate and velocity in the xylem vessels and using Hagen-Poiseuille equation. The results showed that the xylem pressure gradient of grape stem with 7 mm diameters and petiole with 4 mm diameters measured with the new method agreed well with the real applied ones. This showed that the measurement of xylem pressure gradient could be real-time and continual by the new method. With the increase of light intensity, the xylem pressure gradients of in vitro grape shoots by this method were positively linearly increased.Key words: grape (Vitis vinifera L.); flow rate; flow velocity; Hagen-Poiseuille equation; xylem pressure gradient
此摘要已有 2318 人浏览