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Unformatted text preview: The plant central vacuole helps maintain turgor. The vacuole holds water and other substances that help maintain proton gradients within the cytosol. Maintaining water balance is critical to plants, just as it is to animals. Water Balance, Water Movement and Transpiration Water Loss Plants are 80-90% water (wet weight). Soil and atmosphere usually contain a much lower proportion of water (winter and spring in Puget Sound excepted) . Most plants present large surface areas to their surroundings; both the root and leaf surface areas are large: roots to absorb water and nutrients, leaves for exposure to sun for photosynthesis. Plants consume and lose much more water than we do, about 17 times as much....
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- Fall '09