Type of Growth A. Primary and SEcondary - see Fig. Tissues which develop from Primary and Secondary growth A. Primary growth 1. gives rise to primary tissues 2. B. Secondary growth gives rise to secondary tissues - secondary xylem, secondary phloem, bark. 36.2 and from Ch. The combination of solute potential and pressure potential equals water potential - the energy of water, or the tendency of water to move.
Water always moves from high to low water potential.
36.4 will be used to illustrate 2. Affect of water potential on overall uptake and movement of water in plants a. Uptake - cell wall is porous, and in addition, there are plasmodesmata between cells, creating a symplast. B. Mechanism of xylem movement - bulk flow 1. Pull due to transpiration. 36.8 and 36.10 will be used to explain transpiration, tension, cohesion and adhesion theory.