关键词: 龙桑, 鸡桑, 蒙桑, 盐胁迫, 生理指标

Abstract: Taking Morus alba cv. Tortuosa, Morus australis Poir. var. Australis, Morus mongolica Schneid. as experimental material, this paper explored the effects of the three different concentrations (0, 100, 200, 300, 400 mmol·L-1) on malondialdehyde (MDA), chlorophyll, soluble sugar (SS), peroxidase (POD), superoxide dismutase (SOD).The content of MDA in three mulberry plants increased with the increase salt concentration. And MDA content in Morus mongolica Schneid. was higher than that in other two mulberry varieties.The content of chlorophyll gradually decreased with the increase of salt concentration, and Morus alba cv. Tortuosa, Morus australis Poir. var. Australis, Morus mongolica  Schneid. reached the minimum values of 6.75, 12.61 and 8.93 mg·g-1 at 400 mmol·L-1 salt concentration. Activity of SOD, POD and the content of SS increased first and then decreased with the increasing salt concentration.  The theoretical basis was provided for the evaluation of salt tolerance of different mulberry varieties planted in saline areas of Western China by the determination of each index.

Key words: Morus alba cv. Tortuosa, Morus australis Poir. var. Australis, Morus mongolica Schneid., salt stress, physiological index