Streptomyces yinggelingensis sp. nov. YGL11-2: A novel biocontrol agent with dual activity against banana soil-borne and postharvest fungal diseases
Year: 2025
Type: article
Abstract: Banana production is severely threatened by both Fusarium wilt (caused by Fusarium oxysporum f. sp. cubense tropical race 4, Foc TR4) and anthracnose (caused by Colletotrichum musae ), which are devastating soil-borne and postharvest diseases, respectively. Biocontrol using antagonistic microorganisms offers an eco-friendly alternative for managing the concurrent occurrence of soil-borne and postharvest pathogens. In this study, strain YGL11-2 was isolated and characterized as a novel species of Streptomyces through polyphasic taxonomy, for which we propose the name Streptomyces yinggelingensis sp . nov . Genomic analysis of this strain revealed 48 secondary metabolite gene clusters, including compounds such as Ectoine and Anantin C, which exhibit potential antifungal activity. Strain YGL11-2 demonstrated dual antagonistic activity against Foc TR4 and C. musae , with half-maximal effective concentrations (EC 50 ) values of 12.01 mg/L and 25.31 mg/L, respectively. Regarding antifungal mechanisms, strain YGL11-2 extracts disrupted fungal cell membrane structures, caused hyphal and spore wrinkling and breakage, and inhibited spore germination. Pot experiments confirmed that banana seedlings treated with strain YGL11-2 extracts showed a reduced Foc TR4 disease index, achieving a control efficacy of 41.94 %, while significantly promoting root growth (+10.55 cm) and biomass accumulation (+46.40 %). In fruit experiments, bananas treated with strain YGL11-2 exhibited an anthracnose inhibition rate of up to 72.96 %, along with improved quality and delayed ripening. This study is the first to discover a novel Streptomyces species capable of cross-type control of both soil-borne and postharvest diseases, offering a breakthrough solution for controlling both types of banana diseases.
Source: Biological Control
Authors: Chunting Li, Xixi Ou, Dengfeng Qi, Wei Wang, Guopeng Zhu, Yufeng Chen, Miaoyi Zhang, Yankun Zhao, Yongzan Wei, Junting Feng, Kai Li, Dengbo Zhou, Jianghui Xie
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: gold
Estimated APC paid: $3,390
Funders: National Natural Science Foundation of China, Chinese Academy of Tropical Agricultural Sciences, Hainan Provincial Department of Science and Technology, China Agricultural Research System, Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences, Earmarked Fund for China Agriculture Research System, Central Public-interest Scientific Institution Basal Research Fund, Chinese Academy of Fishery Sciences
OpenAlex ID: W4417437583