生防链霉菌SAT1的分离、鉴定及其对辣椒疫霉的生物防治潜力

辣椒疫霉引起的植物病害使农业遭受了巨大的经济损失,环保、经济实用的混合微生物菌剂防治策略是当前的最新发展趋势.试验从6种药用植物分离得到15株植物内生菌,平板拮抗实验筛选得到拮抗链霉菌SAT1,经鉴定为Streptomyces anandii,其发酵液粗提物和挥发性物质对辣椒疫霉菌丝生长有明显抑制作用.接种链霉菌SAT1的孢子液可提高辣椒苗对辣椒疫霉的抗性并明显促进辣椒苗的生长.

Screening and identification of antagonistic SAT1 and its potential for biocontrol of pepper phytophthora blight

Numerous soft rots of pepper are caused by Phytophthora capsici, which give rise to serious economic lossesof agriculture. An emerging trend is applying a mixture of diverse group of microorganisms as the most economicallyfeasible practical strategy. A total of 15 endophytes were isolated from 6 medicinal plants, and an antagonistic Streptomyces SAT1 were screened by antagonism assays and was identified as S. anandii, the crude extract from the fermented liquid and volatile substances of SAT1 obviously inhibited the growth of Phytophthora capsici. The spore suspensions of Streptomyces SAT1 could improve the plants resistance to pepper phytophthora blight and obviously promote the growth of pepper seedlings.