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| Introduction |
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| The study of world of life is as old as man itself. All living organisms are made up of a few elements which are repeated in each of them. The basic unit of life - cell, is a structural and functional entity of life. |
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| Of all the environmental factors that affect plant life, none is more important than water. |
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| The water relations of climate, soil and plants have been extensively studied by scientists, but much more must be done on water conservation and on the utilisation of water by plants if the earth is to support its rapidly increasing population (diverse applications). |
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| During plant's life cycle, large amounts of water are continuously absorbed from the soil and transported to every part of the plant. Land plants get their major water supply from the soil. Water is the most important constituent of the plant body. Most herbaceous plants are made up of 85 - 90 percent water and even woody parts of plants consist of as much as 50 percent water. Moreover, plants growing in soil are constantly losing large quantities of water by transpiration. Without the constant supply of water the plant cannot carry on any of its physiological activities such as photosynthesis, respiration and growth. |
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| Obviously an understanding of the manner in which plants get water is important. In this chapter we shall study the absorption, translocation of water and transpiration in plants. |
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