Modestobacter roseus sp. nov., an endophytic actinomycete isolated from the coastal halophyte Salicornia europaea Linn., and emended description of the genus 
               
                  Modestobacter

Qin, Sheng; Bian, Guangkai; Zhang, Yue-Ji; Xing, Ke; Cao, Changqun; Liu, Changhong; Dai, Chuan‐Chao; Li, Wenjun; Jiang, Ji-Hong

doi:10.1099/ijs.0.044412-0

Cited by 37 publications

(10 citation statements)

References 23 publications

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“…For example, strain KLBMP 1279 shared 99.5% 16S rRNA gene sequence identity to Modestobacter marinus 42H12-1 T , a marine obtained actinobacterium isolated from a deep-sea sediment sample (2,983 m depth) from the Atlantic Ocean (Xiao et al, 2011). However, KLBMP 1279 exhibited culture characteristics differing from M. marinus and thus represents a new Modestobacter species, named as Modestobacter roseus (Qin et al, 2013b). Moreover, several strains exhibited relatively lower 16S rRNA gene identities (<98.7%) to characterized isolates and represented novel species (Table 3).…”

Section: Resultsmentioning

confidence: 99%

Community Composition and Metabolic Potential of Endophytic Actinobacteria From Coastal Salt Marsh Plants in Jiangsu, China

Chen

Zhang

et al. 2019

Front. Microbiol.

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The diversity and functional roles of the plant associated endophytic actinobacteria in unique habitats remain poorly understood. In this paper, we examined the phylogenetic diversity and community composition of endophytic actinobacteria associated with native coastal salt marsh plants in Jiangsu, China using a combination of cultivation and 16S rRNA gene-based high-throughput sequencing (HTS) methods. Further, we evaluated the antifungal, fibrinolytic activities and the secondary metabolite biosynthesis potential of isolates via gene screening. A total of 278 actinobacterial isolates were isolated from 19 plant samples. 16S rRNA gene sequencing revealed that the isolates were highly diverse and belonged to 23 genera within the Actinomycetales order, with Streptomyces , Saccharopolyspora , and Pseudonocardia comprising the most abundant genera. In addition, more than 10 of the isolates were novel actinobacterial taxa distributed across eight genera. HTS analyses of seven representative plant root samples revealed that Actinobacteria phylum constituted 0.04–28.66% of root endophytic bacterial communities. A total of four actinobacterial classes, 14 orders, 35 families, and 63 known genera were detected via HTS, and these communities were found to be dominated by the members of the order Actinomycetales including the genera Streptomyces , Mycobacterium , Arthrobacter , Nocardioides , and Micromonospora . In addition, 30.4% of the representative isolates exhibited antifungal activities, 40.5% of them showed fibrinolytic activities, while 43.0% of the strains harbored secondary metabolite biosynthesis genes. These results demonstrated that coastal salt marsh plants in the Jiangsu Province represented an underexplored new reservoir of diverse and novel endophytic actinobacteria that may be of potential interest in the discovery of bioactive compounds with potential as biocontrol agents and for fibrinolytic enzyme production.

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Section: Resultsmentioning

confidence: 99%

Community Composition and Metabolic Potential of Endophytic Actinobacteria From Coastal Salt Marsh Plants in Jiangsu, China

Chen

Zhang

et al. 2019

Front. Microbiol.

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“…The genus Modestobacter belongs to the family Geodermatophilaceae [ 43 , 44 ] of the order Geodermatophilales [ 45 ]. Like other strains of the order Geodermatophiles , the genus Modestobacter tend to be associated with extreme biomes, including deteriorated sandstone [ 38 ], desert plateau [ 39 ], deep-sea sediment [ 46 ] and coastal halophytes [ 47 ]. The present study reports the isolation of a Modestobacter strain from a eutrophic lake located in Yunnan, China.…”

Section: Discussionmentioning

confidence: 99%

Modestobacter lacusdianchii sp. nov., a Phosphate-Solubilizing Actinobacterium with Ability to Promote Microcystis Growth

et al. 2016

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A novel actinobacterium, designated strain JXJ CY 19T, was isolated from a culture mat of Microcystis aeruginosa FACHB-905 collected from Dianchi Lake, South-west China. 16S rRNA gene sequences comparison of strain JXJ CY 19T and the available sequences in the GenBank database showed that the strain was closely related to Modestobacter marinus 42H12-1T (99.1% similarity) and Modestobacter roseus KLBMP 1279T (99.0%). The isolate had meso-diaminopimelic in the cell wall with whole-cell sugars of mannose, rhamnose, ribose, glucose, galactose, and arabinose. The menaquinone detected was MK-9(H4), while the major cellular fatty acids include C17:1 ω8c, C15:0 iso, C15:1 iso G and C16:0 iso. The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylinositol, phosphatidylinositol mannoside and an unidentified phospholipid. The DNA-DNA hybridization values between strains JXJ CY 19T and the closely related type strains Modestobacter marinus CGMCC 4.5581T and Modestobacter roseus NBRC 108673T were determined to be 50.8 ± 0.8% and 44.1 ± 1.7%, respectively. The DNA G+C content was 71.9 mol%. On the basis of the above taxonomic data and differences in physiological characters from the closely related type strains, strain JXJ CY 19T was recognized as a novel species of the genus Modestobacter, for which the name Modestobacter lacusdianchii sp. nov. (JXJ CY 19T = KCTC 39600T = CPCC 204352T) is proposed. The type strain JXJ CY 19T can solubilize calcium phosphate tribasic (Ca3(PO4)2), phytin and L-α-phosphatidylcholine. The phosphate-solubilizing property of the novel actinobacterium could be a possible factor for the increase in growth of Microcystis aeruginosa FACHB-905 in ecosystem where the amount of available soluble phosphate is limited such as Dianchi Lake.

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“…A few reports are available on the isolation and characterization of endophytic actinobacteria. A novel isolate, Modestobacter roseus KLBMP 1279 T , was obtained from the roots of Salicornia europaea , a halophyte of coastal region of Jiangsu Province, China (Qin et al, 2013a ). A novel endophytic actinobacterium, Okibacterium endophyticum , capable of growth at high salt concentration (upto 7% NaCl) and at high pH was reported to be inhabitant of the roots of the halophyte Salsola affinis (Wang et al, 2015c ).…”

Section: Endophytic Actinobacterial Diversity In Various Ecosystemsmentioning

confidence: 99%

Diversity and Applications of Endophytic Actinobacteria of Plants in Special and Other Ecological Niches

2018

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Actinobacteria are wide spread in nature and represent the largest taxonomic group within the domain Bacteria. They are abundant in soil and have been extensively explored for their therapeutic applications. This versatile group of bacteria has adapted to diverse ecological habitats, which has drawn considerable attention of the scientific community in recent times as it has opened up new possibilities for novel metabolites that may help in solving some of the most challenging problems of the day, for example, novel drugs for drug-resistant human pathogens, affordable means to maintain ecological balance in various habitats, and alternative practices for sustainable agriculture. Traditionally, free dwelling soil actinobacteria have been the subject of intensive research. Of late, symbiotic actinobacteria residing as endophytes within the plant tissues have generated immense interest as potential source of novel compounds, which may find applications in medicine, agriculture, and environment. In the light of these possibilities, this review focuses on the diversity of endophytic actinobacteria isolated from the plants of extreme habitats and specific ecological niches. Furthermore, an attempt has been made to assign chemical class to the compounds obtained from endophytic actinobacteria. Potential therapeutic applications of these compounds and the utility of endophytic actinobacteria in agriculture and environment are discussed.

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Modestobacter roseus sp. nov., an endophytic actinomycete isolated from the coastal halophyte Salicornia europaea Linn., and emended description of the genus Modestobacter

Cited by 37 publications

References 23 publications

Community Composition and Metabolic Potential of Endophytic Actinobacteria From Coastal Salt Marsh Plants in Jiangsu, China

Community Composition and Metabolic Potential of Endophytic Actinobacteria From Coastal Salt Marsh Plants in Jiangsu, China

Modestobacter lacusdianchii sp. nov., a Phosphate-Solubilizing Actinobacterium with Ability to Promote Microcystis Growth

Diversity and Applications of Endophytic Actinobacteria of Plants in Special and Other Ecological Niches

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