Bài viết Phân lập vi khuẩn lactic có hoạt tính đối kháng nấm Colletotrichum sp. gây bệnh thán thư trên trái ớt sừng sau thu hoạch được thực hiện nhằm phân lập và tuyển chọn vi khuẩn lactic có hoạt tính đối kháng nấm Colletotrichum sp. gây bệnh thán thư trên trái ớt sừng sau thu hoạch ở huyện Bình Tân, tỉnh Vĩnh Long. | TNU Journal of Science and Technology 228 01 349 - 356 ISOLATION OF LACTIC ACID BACTERIA WITH ANTIFUNGAL ACTIVITY AGAINST Colletotrichum sp. CAUSING ANTHRACNOSE ON POSTHARVEST CAPSICUM FRUITS Nguyen Thi Hong Gam1 Tran Quoc Dung2 Nguyen Tri Yen Chi1 Quach Van Cao Thi1 1Vinh Long University of Technology Education 2Party Committees of Vinh Long Province s Agencies and Enterprises ARTICLE INFO ABSTRACT Received 13 10 2022 Anthracnose caused by Colletotrichum sp. appear more popular causing much damage to the yield and quality of many crops. Therefore this study Revised 07 12 2022 was conducted to isolate and select lactic acid bacteria against Published 20 12 2022 Colletotrichum sp. causing anthracnose on postharvest capsicum fruits in Binh Tan district Vinh Long province. As the results 7 strains of lactic acid bacteria were isolated from traditional fermented products such as KEYWORDS kimchi sauerkraut and sour shrimp. Antagonistic activity of isolated lactic Anthracnose disease acid bacteria against Colletotrichum sp. was carried out by antagonistic mycelia and spore methods. The results showed that 7 7 strains of lactic Antifungal activity acid bacteria performed the antifungal activity Colletotrichum sp. Capsicum annuum L. including 6 7 strains with the well resistance and 1 7 strains with moderate Colletotrichum sp. resistance. KC2R strain was noted with the significantly highest antibacterial activity to Colletotrichum sp. with an antagonistic efficiency Lactic acid bacteria by the mycelium method of and average inhibition zone by spore method is cm. Based on the results of morphological characteristics the 16S rRNA gene sequencing showed that the KC2R strain were classified belonging to the species of Lactobacillus plantarum with 100 similarity. Research results showed that KC2R strain has the high application potential to post-harvest chili storage. PHÂN LẬP VI KHUẨN LACTIC CÓ HOẠT TÍNH ĐỐI KHÁNG NẤM Colletotrichum sp. GÂY BỆNH THÁN THƯ TRÊN TRÁI
