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¹ Atatürk Üniversitesi, Ziraat Fakültesi, Tarımsal Yapılar ve Sulama Bölümü, Erzurum
² Atatürk Üniversitesi, Ziraat Fakültesi, Bahçe Bitkileri Bölümü, Erzurum DOI : 10.16882/derim.2015.90060 Viewed : 1648 - Downloaded : 1713 Drought stress has been an important issue nowadays in plant production because of the decline in quantity and quality of water resources in the world and it leads to alter the normal physiological function of the economically high valued plants. This situation makes cultivation of plants tolerant to high stress more crucial. Therefore, current studies are mostly focused on the explaining the tolerance mechanisms of highly drought resistant plants and protecting and transforming of the plant genetic sources. In this paper, drought effects on the plants, plant physiological reactions to drought and adaptation mechanisms of the plants are explained by referring important researches done in the recent years. Keywords : Abiotic stress, Drought, Plant physiology, Stomatal conductance, Osmotic adjustment