BIO330H5 Final: BIO330 2. Water Relations
Document Summary
Water moves down gradients of water potential ( ) Most loss is a side effect of photosynthetic co uptake. Water must be replaced through the roots (usually) Water movement is a passive process controlled by water potential ( ) Plants use water for structure (most tissue is water), as a chemical medium, a raw ingredient. Water loss is inexorably linked to photosynthetic uptake water is lost when plants photosynthesize (release h2o when they take up co2) To make 1 gram of glucose takes 100 l of water. They process a lot of water; a big tree goes through ton of water a day transpired into atmosphere. Plants have to be constantly replacing water; water stress is a common way of killing plants they"re very vulnerable to water stress. Plants use a lot of water and have to guard against water depletion. Water uptake is a passive process; a result of physical processes (no energy) diffusion.
