Dyella aluminiiresistens sp. nov., a Ala plus - tolerant bacterium with the ability to inhibit Fusarium oxysporum f. sp. melonis isolated from rhizosphere soil of muskmelon
文献类型： 外文期刊
作者： Li, Yi 1 ; Wang, Jiaojiao 1 ; Wu, Chunyuan 1 ; He, Jian 3 ; Li, Qinfen 1 ; Deng, Xiao 1 ; Tan, Huadong 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China
2.Hainan Univ, Coll Ecol & Environm, Haikou 570228, Peoples R China
3.Nanjing Agr Univ, Coll Life Sci, Key Lab Agr Environm Microbiol, Minist Agr, Nanjing 210095, Peoples R China
关键词： chemotaxonomic characterization; Dyella aluminiiresistens sp. nov; polyphasic taxonomy; phylogeny.
期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.0； 五年影响因子：2.2 ）
ISSN： 1466-5026
年卷期： 2025 年 75 卷 1 期
页码：
收录情况： SCI
摘要： A bacterial strain, designated as A6T, was isolated from the rhizosphere soil of a healthy muskmelon in Wenchang, Hainan Province, China. The cells of strain A6T were Gram- negative, aerobic, short rod and motile with a single polar flagellum. Strain A6T could tolerate up to 55.0 mM Al3+ and inhibited the growth of Fusarium oxysporum f. sp. melonis, which is the pathogen of muskmelon Fusarium wilt. Growth occurred at 15-37 degrees C (optimum at 30 degrees C), pH 4.5-8.0 (optimum pH 6.5) and with 0-3.0 % NaCl (w/v; optimum, 0.5%). Strain A6T shared the highest 16S rRNA gene sequence similarities with Dyella lutea SaT (98.0%), followed by dens DHoT (97.7%) and Frateuria soli 5GH9-11T (97.7%). Phylogenetic trees based on 16S rRNA gene and genomic sequences indicated that strain A6T belonged to the genus Dyella and formed a subclade with Dyella lutea SaT and Dyella thiooxydans ATSB10T. The average nucleotide identity (ANI), average amino acid identity (AAI) and digital DNA-DNA hybridization (dDDH) values between A6T and its closely related type strains were 78.8-80.8 %, 70.0-71.7 % and 20.5-22.1 %, respectively. The sole respiratory quinone was ubiquinone- 8 (Q- 8). The polar lipid profile consisted of diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), two unidentified aminophospholipids (APL1- 2) and three unidentified phospholipids (PL1- 3). The major cellular fatty acids (>= 5 %) were iso- C17:0, C16:0, summed feature 9 (iso- C17: 1 omega 9c and/or C16: 0 10-methyl), iso-C15:0, iso-C16: 0 and anteiso- C17:0. The genome size of strain A6T was 3.7 Mb with a DNA G+C content of 65.1%. Based on the phenotypic, phylogenetic, genotypic and chemotaxonomic features, strain A6T represents a novel species in the genus Dyella, for which Dyella aluminiiresistens A6T sp. nov. is proposed. The type strain is A6T (= GDMCC 1.4640T = KCTC 92542T).
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