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Unformatted text preview: plasmodesmata to the xylem B.4. B.5. Plasmodesmata are strands of protoplasm connecting parenchyma cells. C. Water Deficit Stress C.1. Why study water movement and water-deficit responses? • Most plant productivity is water-limited • Water availability may decrease in may agricultural areas in the future • The human population is still growing C.2. Stages of Water Deficit • Mild Stress- No wilting, frequent in afternoons C.2. .a. Problems → very low growth • Moderate Stress- some afternoon wilting C.2. .a. Problems → reduction in photosynthesis by 50%, no growth in the afternoon, but still at night • Severe stress- wilting most of the day C.2. .a. Problems → no growth and low photosynthesis occurrences C.2. .b. Membrane damage in Parenchyma cells and protein denaturation are two things that will kill the...
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- Spring '09