Abstract:

The promoting growth function of endophytic strain Thhy1 (Bacillus subtilis) were measured by germination of tomato seeds and the growth of plants. The results showed that the seeds germination were significantly promoted by Thhy1 strains with their cells and metabolites suspension dippling seeds. Compared with the water control, the germination quality and quantity of seeds were promoted when the cells suspension density below 40%，but were inhibited above 40%.The results also showed that germination of tomato seeds were better by treated with cells suspension. The fresh and dry weight of the tomato seedling were increased above 120%, the average high of the seedling were increased 62.01%; the average length of the seedling roots were increased 44.14%；and the average thick of the seedling stems were increased 50.00% in the pots. The mutanted by antaganism against the rifampicin, and inoculated by dippling seeds and dallbing leaves. Thhy1 strains were proved to be able to colonize in tomato plants. The results also showed that the colonize ability of dallbing leaves was stronger than dippling seeds.