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Water potential in the plant
Course: Plant Physiology Lab Experimental Teaching Centre Of Life Sciences
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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
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Water Potential Chemical Potential ——free energy per mole of substance
—— the chemical potential of water divided by the partial molal volume of water
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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
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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？
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Thinking As the soil dries, how to adjust water potential of the plant?
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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？
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