|MadSci Network: Cell Biology|
In many plant cells, vacuoles ( single or multiple of them ) can occupy up to 90% of cell volume. With such a big volume, vacoule plays important roles in turgor regulation, storage and waste degenerating. Firstly, the solutions in vacuole normally are in high concentration, this may cause water uptake into vacuole, thus the concentration of solutes in cytoplasm are controlled. Secondly, many substances are stored in vacuole; some of them are metabolism waste, while others are food or energy reserves, such as carbohydrates. Finally, many enzymes find their place in vacuole when they are not used by plant cell, this prevents the enzymes from being denatured. so in a word, vacuole is important to plant cell, no matter judging from its volume occupancy or from its functions. Reference: Plant Biochemistry, 1997, Academic Press, edited by P.M Dey & J.B. Harborne
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