数字农科院2.0

Streptomyces adonidis sp. nov., a novel actinomycete strain with antifungal activity isolated from the root of Adonis amurensis Regel

文献类型： 外文期刊

作者： Rui Du;Hui Bing;Wentian Lu;Congting Gao;Fanxue Kong;Hongtu Wang;Yue Shen;Chongxi Liu;Wensheng Xiang

作者机构：

关键词： Antifungal activity;Biosynthetic gene cluster;Endophyte;Polyphasic taxonomy;Streptomyces

期刊名称： Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology

ISSN： 0003-6072

年卷期： 2025 年 118 卷 4 期

页码：

收录情况： SCIE（2025版）

摘要： A novel endophytic actinomycete with antagonistic activity against Fusarium moniliforme, designated strain NEAU-BLH26T, was isolated from the root of Adonis amurensis Regel collected at the horticultural experiment station of Northeast Agricultural University, Heilongjiang Province, northeast China. Strain NEAU-BLH26T exhibited morphological and chemotaxonomic features of the genus Streptomyces. The diamino acid present in its cell wall was identified as LL-diaminopimelic acid, while galactose detected in whole-cell hydrolysates. The menaquinones were identified as MK-9(H6), MK-9(H8), and MK-9(H4). The phospholipid profile comprised diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylinositol, two unidentified phospholipids and two unidentified aminolipids. The major fatty acids were determined to be iso-C16:0 and C16:0. The DNA G + C content, based on the genome sequence, was 70.5 mol%. Phylogenetic analyses of 16S rRNA gene and whole genome sequences analyses indicated that strain NEAU-BLH26T was most closely related to Streptomyces geranii A301T, with a 16S rRNA gene sequence similarity of 98.69%. However, the average nucleotide identity, average amino acid identity and digital DNA–DNA hybridization values confirmed that strain NEAU-BLH26T represents a distinct species. This conclusion was further supported by phenotypic and chemotaxonomic differences between strain NEAU-BLH26T and its closest relative. Additionally, the secondary metabolite biosynthetic gene clusters in strain NEAU-BLH26T were predicted and analyzed. Based on phenotypic, chemotaxonomic and genotypic evidence, strain NEAU-BLH26T is proposed as a novel species of the genus Streptomyces, for which the name Streptomyces adonidis sp. nov. is suggested. The type strain is NEAU-BLH26T (= JCM 36414T = MCCC 1K08678T).

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