植物生理学复习题(review of plant physiology)
18页1、植物生理学复习题(Review of Plant Physiology)Chapter 1 water physiology of plants (emphasis)Water potential: the difference between the chemical potential of aqueous solution and the chemical potential of pure water divided by the partial molar volume of water.Apoplastic pathway: the movement of water through the cell walls, cell spaces, etc. without cytoplasm, with little resistance and rapid movement. In thePlastid pathway: the movement of water from the cytoplasm of one cell through the plasmodesmata
2、to the cytoplasm of another cell, forming a cytoplasmic continuum that moves at a slower rate. In theOsmosis: water from the water system through the semipermeable membrane to the system moving phenomenon of low water potential.Root pressure: the pressure produced by water potential entering the middle column due to the gradient of water potential. In theTranspiration: a phenomenon in which water is released from the body through the surface of the plant (mainly leaves) in a gaseous state.Cohesi
3、on Theory: the water has great cohesive force to resist the tension, guaranteed by the leaf Zhigen column to explain the reason for the rise of the continuous water theory. In theCritical period of water: a period in which plants are particularly sensitive to water deficit.1., the plant cells were placed in pure water and 1mol/L sucrose solution. What were the changes of osmotic potential, pressure potential, water potential and cell volume of the cells?Answer: in pure water, each index increase
4、s; in the cane sugar, each index reduces.4. how does moisture enter the root canal? How does water transport to leaves?Answer: there are three ways to enter the root in the catheter:Apoplastic pathway: the movement of water through cell walls, cell spaces, etc. without cytoplasm, with little resistance and rapid movement. In theTransmembrane pathway: the movement of water from one cell to another through the plasma membrane two times and through the vacuole membrane. In thePlastid pathway: the m
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