Research focused on the improvement of drought tolerance in crop plants has received increased attention. The development of drought-tolerance technologies is one of the most important initiatives for the seed industry in this decade. Increasing worldwide demands for food and agricultural products, combined with fixed amounts of arable land is driving a need for increased productivity. At the same time in freshwater resources are in decline. Public efforts to restrict water usage focus on ways to maintain sustainable water levels in major aquifers and reservoirs.