Plant Physiology. Water and Plant Cells. Water and plant cells I. Background on water in plants II. The properties of water III. Understanding the direction of water movement: Water potential. Water Plant cells are mostly water; 80 - 95% of the mass of growing cells,By aislin
Water and Water Relations. Plant Phys and Biotech, Biology 3470 Lecture 3; Jan. 10, 2006 Chapter 10: effects of H 2 O at cellular level. Rost et al., “Plant biology,” 2 nd edn. Why is water important to (plant) cells?. Water constitutes 70% by weight of annual plantsBy dbull
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Water Water Water Potential . What are you water potential?. M easures the tendency of water to leave one place in favor of another Measured in bars High water potential = water molecules can easily move about Low water potential = water molecules cannot easily move about. Water Potential.
Water Potential. AP Biology – Chapter 7 & Lab 4. Learning Targets. I can explain what water potential is and how it is impacted by Ψs and Ψp . I can design an experiment to determine the concentration of solutes in a living cell. Ψ = Ψs + Ψp Ψ s= - iCRT. Plants & Water Potential.
Water Potential. Water Potential. Tendency of water to favor one side more than another. Water moves from an area of high potential to low potential. Predicts which way water diffuses in PLANT tissues using the Greek letter Psi. Formula for Water Potential.
Water Potential. WATER POTENTIAL. Water potential measures water’s tendency to leave one place in favor of another. Calculating water potential. Ѱ s + Ѱ p = Ѱ Solute potential Adding solute decreases water potential Pressure potential Increasing pressure increases water potential.
Water Potential. The free energy per mole of water Calculated from two components: Solute potential (osmotic pressure) Pressure potential (turgor pressure). Water Potential. What is solute potential? Dependent on solute concentration Also called the osmotic potential
Water Potential. Used to predict the movement of water in and out of plant cells. Water will move from areas of high water potential to areas of low water potential. Determined by solute concentration and pressure . Ψ = Ψ s + Ψ p Ψ =water potential Ψ s=solute potential
Water Potential. Tendency of water to favor one side more than another. Predicts which way water diffuses in PLANT tissues using the Greek letter Psi. (Ψ) Plants use water potential to transport water to the leaves so that photosynthesis can take place. Water potential in plants
WATER POTENTIAL. Osmosis. Osmosis = the movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane. Osmosis is considered in terms of water potential and solute potential. Water Potential.
Water potential . Water potential = solute potential + pressure potential. Pressure potential . A force that resists water flow due to a container (cell) being full and not wanting to expand any more. Cell walls of plant cells are important in this regard. Solute potential .