Plants are 90 per cent water and they require water for all growth processes. Drought may produce several effects on plants, including reduced growth and vigour, wilting and nutrient deficiencies. Effects may still be noted five years after a water shortage.
Plants use water for photosynthesis and temperature regulation. Drought inhibits these processes and decreases the growth and vitality of the plant.
Water transports minerals from soil to the plant. Without water, plants become nutrient deficient.
Water maintains cell structure and holds plants erect. A deficit of water in the plant causes wilting.