Streptomyces triticagri sp. nov. and Streptomyces triticirhizae sp. nov., two novel Actinobacteria isolated from the rhizosphere soil of wheat (Triticum aestivum L.)
2019; Microbiology Society; Volume: 70; Issue: 1 Linguagem: Inglês
10.1099/ijsem.0.003727
ISSN1466-5034
AutoresChuanyu Han, Zhiyin Yu, Junwei Zhao, Haoran Shi, Jiangmeihui Hu, Bing Yu, Jia Song, Yue Shen, Wensheng Xiang, Xiangjing Wang,
Tópico(s)Plant Pathogens and Fungal Diseases
ResumoTwo novel Actinobacteria, designated strains NEAU-YY421T and NEAU-YY642T, were isolated from the rhizosphere soil of wheat (Triticum aestivum L.) collected from Zhumadian, Henan Province, PR China and characterized using a polyphasic approach. Phylogenetic analyses based on 16S rRNA gene sequences showed that strains NEAU-YY421T and NEAU-YY642T belonged to the genus Streptomyces and strain NEAU-YY421T was most closely related to Streptomyces fumanus CGMCC 4.1732T (97.9 % sequence similarity) and Streptomyces naganishii DSM 40282T (97.8 %), and that of strain NEAU-YY642T to Streptomyces zhaozhouensis LZS-5T (98.0 %) and Streptomyces sedi YIM 65188T (97.5 %). The cell walls of the two strains contained ll-diaminopimelic acid as the diagnostic diamino acid and the whole-cell hydrolysates were glucose and ribose. Multilocus sequence analysis using the concatenated sequences of the atpD, gyrB, recA, rpoB and trpB genes showed that the two strains formed separate branches in the genus Streptomyces. Moreover, a combination of DNA-DNA hybridization results and cultural and physiological properties indicated that the two strains can be distinguished from their closest phylogenetic relatives. Therefore, strains NEAU-YY421T and NEAU-YY642T belong to two novel species in the genus Streptomyces, for which the names Streptomyces triticagri sp. nov. (NEAU-YY421T=CGMCC 4.7476T=DSM 106775T) and Streptomyces triticirhizae sp. nov. (NEAU-YY642T=CCTCC AA 2018092T=DSM 107172T) are proposed, respectively.
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