Abstract The fungal pathogen Botrytis cinerea causes grey mold, a severely damaging disease of strawberry. Lactic acid bacteria (LAB) are known for their biopreservative activity. Meanwhile, LAB dominate in plant organs over time, and are of pivotal importance for plant defense. The goal of the present study was to isolate endophytic LAB and to evaluate for their biocontrol activities against B. cinerea. Of the tested endophytic bacteria isolates, Lactobacillus plantarum CM-3 demonstrated the highest potential for in vitro and in vivo control of B. cinerea. The in vitro results showed that L. plantarum CM-3 reduced the mycelial growth of B. cinerea on Potato Dextrose Agar (PDA) between 55.27% and 79.80%. Spore germination of the pathogen was greatly inhibited in the presence of living cell suspensions. In in vivo biocontrol assays, the decay incidence and lesion diameter of grey mold decay of strawberries treated by L. plantarum CM-3 cells were significantly (P

中文翻译：

---

一株具有拮抗草莓果实灰霉病菌活性的植物乳杆菌CM-3内生菌株

摘要 真菌病原体灰霉病会导致灰霉病，这是一种严重的草莓病害。乳酸菌 (LAB) 以其生物防腐活性而闻名。同时，随着时间的推移，LAB 在植物器官中占主导地位，对植物防御至关重要。本研究的目的是分离内生 LAB 并评估它们对 B. cinerea 的生物防治活性。在测试的内生细菌分离株中，植物乳杆菌 CM-3 表现出对 B. cinerea 进行体外和体内控制的最高潜力。体外结果表明，植物乳杆菌CM-3 使B. cinerea 在马铃薯葡萄糖琼脂(PDA) 上的菌丝生长减少了55.27% 至79.80%。在活细胞悬液的存在下，病原体的孢子萌发被极大地抑制。在体内生物防治试验中，