Effect of bio-control actinomyces agent on growth and PPO activity of tomato

[Objective] The studry aimed to explore the mechanism of bio-control actinomyces agent on disease suppression and growth promoting effect.[Method] The effects of two diluted agents on biomass and activity of protective enzyme of tomato were investigated,and the seedings untreated with bio-control actinomycete agents were used as controls.The bio-control actinomyces agent 1(BCA1)was prepared with mixed materials including Act1 Streptomyces californicus,Act11 Streptomyces carnosus,Act12 Streptomyces pactum(1∶1∶1 by quanlity)and the bio-control actinomyces agent 2(BCA2)including Act1 Streptomyces californicus,Act2 Streptomyces pseudovenezuelae,Act8 Streptomyces sp.(1∶1∶1 by quanlity).The commom method was used to measure the plant biomass and PPO activity.[Result] ①Inoculating with two bio-control actinomyces agents,the leaves PPO activity decreased and root's PPO activity increased separately,and this effect decreased with tomato growth.②There was a significant increase of the growth of tomato,BCA1 made the biomass,stem weight,root weight and fibrous root weight increase by 44.27%,47.38%,14.58% and 52.85% separately.BCA2 increased the biomass,stem weight,root weight and fibrous root weight by 46.87%,47.89%,42.63% and 93.65%,separately.[Conclusion] Inoculating with two bio-control actinomyces agents increased tomato biomass and root PPO activity,and improved the root immunity from disease.