PLANT WATER RELATIONS

For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, 040-64501777 / 65864777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. PLANT - WATER RELATIONS: Water is essential for all physiological activities of the plant and plays a very important role in all living organisms. Water is the main component of plant cells. Many plant functions depend upon the properties of water. Water constitutes 70% by weight in most forms of life. Watermelon has 92% water, most herbaceous plants have 10 to 15% of its fresh weight as dry weight. Carrot root is about 85% water by weight & young leaves of Lettuce contain 90% water. Distribution of water within a plant varies. Woody parts have relatively very little water, while other parts mostly contain water. A seed may appear dry but still has water otherwise it would not be alive.The physical & chemical properties of water make it suitable for a variety of purposes in plants. 1 It is a medium in which diffusion of solutes takes place in plant cells. 2 It is a solvent in which mineral nutrients enter into a plant from soil solution & transported throughout the plant in an aqueous medium. 3 It is a medium in which many biochemical reactions occur. 4 Water imports turgidity to plant cells. 5 It provides mechanical support & rigidity to the plant cells. 6 Several movements of plant parts such as folding of leaflets in sensitive plants, opening & closing of flowers, and stomata movements of leaves are due to water. 7 Growth of plants due to elongation depends on water. 8 It is the source of O2 evolved in photosynthesis. 9 Water regulates heat in plant body. 10 Water is the medium for fertilisation. It helps in dissemination of spores, fruits & seeds. Terrestrial plants take up huge amount of water daily but most of it is lost to the air through evaporation from the leaves i.e. Transpiration. A mature Corn plant absorbs almost 3 litres of water in a day, while a Mustard plant absorbs water equal to its own weight in about 5 hrs. Because of this high demand for water, it is not surprising that water is often the limiting factor for plant growth and productivity in both agricultural & natural environments.