BIOA02H3 Lecture Notes - Lecture 8: Symporter, Malic Acid, Sedum
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BIOA02H3 Full Course Notes
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Of pure water = 0 mega pascals (no solutes, and at standard atmospheric pressure) Water moves from high to low water potential. Influenced by: w = s + p: solute potential, pressure potential. When pressure of h2o filled central vacuole and cytoplasm against cell wall make the cell firm or turgid. When plants lose more water than they gain. When plant cells shrink so much due to outward osmotic movement of water that they retract from their walls. Water diffuses into roots in cell walls of root epidermal cells. Water travels across root to root xylem by 2 pathways: Roots take up ions by active transport: apoplastic, symplastic. Water then moves across cortex to endodermis via cell walls and intercellular spaces. Water then flows from cytoplasm of one cortical cell to the next via plasmodesmata. In root endodermis, forces apoplastic water to symplast.
