Water potential in the plant Course: Plant Physiology Lab Experimental Teaching Centre Of Life Sciences
The way of water absorbed by plant Diffusion —— concentration gradient 简单扩散 浓度梯度 Mass flow —— pressure gradient 集流 压力梯度 Osmosis —— water potential gradient 渗透作用 水势梯度
Water Potential Chemical Potential ——free energy per mole of substance —— the chemical potential of water divided by the partial molal volume of water
Water enters the cell along a water potential gradient Cell Water Potential Factors: concentration, pressure and gravity Water enters the cell along a water potential gradient 适用于有液泡的细胞或细胞群
Experient 质壁分离法——测定细胞渗透势 质壁分离和质壁分离复原现象可证明植物细胞是一个渗透系统。 小液流法——测定细胞水势 要求：叶片在蔗糖溶液中浸没的时间内不时振荡？ 蔗糖溶液配制过程中充分混匀？
Thinking As the soil dries, how to adjust water potential of the plant?
有人说：鲜切花放在含有茶叶水的花瓶中，可以保持更长的时间。请问：你是如何看待这个现象背后的生物学原理？