Abstract:

Two bacterial strains N16, N432 which could degrade chlorpyrifos were identified, and the effect of the fermentation liquid from the strains on sprout and seeding of radish was studied. The strains were identified based on the morphological, physiological, biochemical characteristic and 16S rDNA sequences. The radish seed treated with the fermentation liquid at 25℃ were cultures, and then germination energy, germination rate, germination index, vigor index were measured. It is showed that N16, N432 were identified as Acinetobacter junii according to the morphological characteristic and sequencing. Germination energy, germination rate, germination index, vigor index of radish seeds pretreated with pure bacteria liquid of N16 were higher than control, but they were inhibited by the N432. Germination rate and germination index were promoted by the liquid culture of N16, but they were inhibited by the liquid culture of N432. And the effects including inhibition of N432 and enhancement of N16 would be weakened when their liquid cultures were diluted.