Effects of Synthetic Salt-tolerant Bacteria on Salt Tolerance of Rice Variety Wushansimiao
To improve the salt tolerance of rice,an artificially synthetic community(ASC)was constructed,consisting of five newly selected salt-tolerant bacterial strains(L-A8,L-B2,L-B9,L-D6 and L-D7)and one existing strain of Pseudomonas aeruginosa(L3),to investigate its effects on salt tolerance of rice variety Wushansimiao.The results showed that L-A8 was identified by 16S rRNA sequence as Achromobacter,L-B2 and L-B9 as Enterobacter,and L-D6 and L-D7 as Shigella.Compared with the control group,the seed germination potential and adult seedling rate after ASC treatment were significantly increased by 41.09 and 21.78 percentage points,and the root length and bud length were significantly increased by 161.9％and 201.7％,respectively.Under hydroponic conditions,compared with the control group,the fresh weight,content of chlorophyll a and content of chlorophyll b of ASC treated seedlings were significantly increased by 107.8％,127.9％and 118.1％,respectively.The contents of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)were significantly increased by 75.9％,41.4％and 35.4％,respectively,while the content of malondialdehyde(MDA)was significantly decreased by 37.0％in the roots of seedlings.Under pot conditions,compared with the control group,the root length,fresh weight,content of chlorophyll a and content of chlorophyll b of ASC treated seedlings were significantly increased by 84.1％,65.0％,48.6％and 65.9％,respectively,and the activities of SOD,POD and CAT were significantly increased by 16.8％,78.7％and 23.0％,respectively,and MDA content was significantly decreased by 23.2％.Compared with the control group,the number of effective panicles,number of total spikelets per panicle and number of filled grains per panicle were increased by 8.8％,22.5％and 39.1％,respectively,and the seed setting rate was increased by 9.68 percentage points,resulting in a significantly increased yield per plant by 63.1％.In summary,ASC has practical significance to improve the utilization rate of saline-alkali land,and can be used as a means to effectively enhance the application value of saline-alkali land.
万方数据
维普
