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《Journal of Henan Agricultural Sciences》 2015-06
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Effects of Caragana korshinskii Litter Aqueous Extract on Its Seed Germination and Seedling Growth

ZENG Miao;Department of Biochemistry,Aba Teachers College;  
In order to study the effects of Caragana korshinskii litter aqueous extract on its seed germination and seedling growth,the selected indexes of seed germination and seedling growth of C. korshinskii were measured under treatments of its litter aqueous extracts from 0. 05 to 0. 30 g / m L with incubation method. The results showed that the indexes of seed germination and seedling growth were significantly inhibited by the higher C. korshinskii litter aqueous extract. When the concentration of aqueous extract was0. 05 g / m L,the indexes of seed germination suffered no significant influence compared with CK( P 0. 05). Seed germination rate,germination potential,germination index,and radicle length were sharply reduced when the concentration of aqueous extract was higher than 0. 05 g / m L( P 0. 05). At the same time,the seed germination time was delayed,but the seedling fresh weight and dry weight did not be affected significantly( P 0. 05). The higher concentration of C. korshinskii litter aqueous extract( 0. 30 g / m L) led to the seed deactivation. Correlation analysis showed that the content of malondialdehyde and membrane permeability had a significant linear positive correlation with the aqueous extract concentration(P 0. 001). The content of chlorophyll,root activity(TTC),the activity of protective enzyme(POD,SOD,CAT) and non-protective enzyme( PPO,PAL) had a significant linear negative correlation with aqueous extract concentration( P 0. 001). Comprehensive analysis indicated that the aqueous extract from the litter of C. korshinskii had autotoxicity on its seed germination and seedling growth.
【Fund】: 阿坝师范高等专科学校青年基金项目(ASC14-31)
【CateGory Index】: S793.3
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