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Updated: Jun 4, 2026

Bioprospecting of Extremophilic Microorganisms to Address Environmental Pollution
Published on: December 30, 2021
Laceyella sediminis sp. nov., a thermophilic bacterium isolated from a hot spring
Jiu-Jiu Chen1,2, Lian-Bing Lin2, Lan-Lan Zhang2
1Key Laboratory of Microbial Diversity in Southwest China, Ministry of Education, PR China, and Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, PR China.
Abstract:
A thermophilic bacterium, designated strain RHA1(T), was isolated from a sediment sample collected from a hot spring in Tengchong county, Yunnan province, south-west China, and was characterized by using a polyphasic approach. Based on its phenotypic and phylogenetic characteristics, strain RHA1(T) was affiliated to the genus Laceyella. The strain formed white aerial and yellow-white substrate mycelia, bearing single endospores on short sporophores. The cell-wall peptidoglycan contained meso-diaminopimelic acid. Whole-cell hydrolysates contained ribose and glucose. The major fatty acids were iso-C(15:0) (62.39%) and anteiso-C(15:0) (17.55%)(.) The predominant menaquinone was MK-9. The G+C content of the genomic DNA of strain RHA1(T) was 47.9 mol%. Based on DNA-DNA hybridization data, chemotaxonomic characteristics and differential physiological properties, strain RHA1(T) is considered to represent a novel species of the genus Laceyella, for which the name Laceyella sediminis sp. nov. is proposed; the type strain is RHA1(T) (=DSM 45263(T)=CCTCC AA 208058(T)).
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