Growth Promoting Effect and Safety Evaluation of Bacillus velezensis JTB8-2 on Processed Tomato

【Objective】 This project aims to make clear the growth-promoting effects and security of B.velezensis JTB8-2 obtained from local processed tomato fields in Xinjiang. 【Method】 The study was carried out by seed germination promotion,hole tray seedling and pot cultivation. 【Results】 The seedling test results showed that the plant height, stem diameter, stem fresh weight and root fresh weight of processed tomato treated with 25, 50 and 100 times dilution of fermentation broth of B.velezensis JTB8-2 were significantly higher than those of blank control. The results of pot experiment showed that the fresh weight of tomato stem treated by fermentation solution 25 times, 50 times and 100 times was significantly higher than those treated by NB medium 25 times, 50 times and 100 times and blank control. The results of seed germination test showed that the original fermentation liquid of strain JTB8-2 had inhibitory effect on seed germination and bud growth of 20 crops, but the dilution liquid of 25 times or more had no effect on seed germination and bud growth of crops. 【Conclusion】 It is safe for seed germination and bud growth of crops to dilute fermentation broth 25 times or more, and the fermentation broth of B.velezensis JTB8-2 can promote the growth of tomato plants. The strain has the potential to be developed into a growth-promoting bacterium of processed tomato and more crops.