The diversity of drought adaptation in the wide

Life on the earth is highly dependent on the properties and functions of water. Zn front of water limitation, herbaceous, woody and epiphyte plants have developed a wide diversity of drought tolerance mechanisms at the molecular, metabolic and physiological levels. The strategies of adaptation to drought have been listed in regard of the level of organization: molecules, cells, whole plant. Root development and water uptake, transpiration and micro- and macromorphological adaptations, and water status and osmotic adjustment have important consequences on drought adaptation. The relationship between these characters and mechanisms and the productivity of cultivated plants are the basis of the breeding for drought tolerance.