Abstract:

The aim was to study the drought resistance mechanism of Nitraria L., and provide theoretical basis for agricultural production. In order to assess the ability of tolerating drought in Nitraria L., we tested the effects of drought stress on physiological and biochemical of Nitraria L. seedlings. In greenhouse experiment we study the changes of relative water content (RWC), malondialdehyde (MDA), proline, soluble protein, Chl content, rate of producing O2-, and the activity of SOD, POD and CAT. It was found: under drought stress, relative water content decreased white proline content showed an increasing trend; in mild and moderate drought stress the soluble protein and chlorophyll content increased, but in severe drought stress they all significantly decreased; as the drought stress, membrane permeability increased, MDA content and rate of producing O2- increases, too. Antioxidant system activity test showed that SOD, POD, CAT activity can synergies, reduce membrane lipid peroxidation and the damage caused by water stress.