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Zhou JS, Cheng JF, Li XD, Li YH. Unique bacterial communities associated with components of an artificial aquarium ecosystem and their possible contributions to nutrient cycling in this microecosystem. World J Microbiol Biotechnol 2022; 38:72. [PMID: 35277761 DOI: 10.1007/s11274-022-03258-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 02/25/2022] [Indexed: 11/30/2022]
Abstract
In order to better understand the bacterial distribution characteristics in a whole microecosystem, the bacterial communities in different components of an artificial aquarium (i.e., plants, fishes, sand and water) were characterized using high throughput sequencing of bacterial 16S rRNA genes. Across all samples, 2873 operational taxonomic units were identified and assigned to 771 genera in 36 phyla. In a principle coordinate analysis, samples clustered according to their origin, indicating that bacterial communities from the same component were most similar. Further taxonomic analysis revealed that most dominant genera, even those with the similar functions, were biased to one component: Nitrospira and Rhodobacter were mainly abundant in plant samples; Rhodococcus, Serratia, Ralstonia, Sphingobacterium and Pseudomonas were most common in sand samples; Cetobacterium and Aeromonas dominated fish samples; and Flavobacterium, Alpinimonas and Limnobacter were especially common in water samples. Functional predictions performed by PICRUSt and the dominant genera exhibited that bacteria detected in each component could participate in all nutrient cycles in the aquarium. However, those involved in carbon and nitrogen cycling were most common in plant and fish samples, while phosphate metabolism-related pathways were more abundant in sand and water samples. Moreover, the aquarium plants, in association with their bacterial communities might be the most important component in the aquarium, as indicated by their highest bacterial richness and diversity. This study adds to our understanding on the differences in the microbiome of different components and their possible contributions to nutrient cycling in a self-sustaining aquarium.
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Affiliation(s)
- Jun Shi Zhou
- College of Life Science, Capital Normal University, Xisanhuan North Road 105#, Haidian District, Beijing, 100048, China
| | - Jian Fei Cheng
- College of Life Science, Capital Normal University, Xisanhuan North Road 105#, Haidian District, Beijing, 100048, China
| | - Xue Dong Li
- College of Life Science, Capital Normal University, Xisanhuan North Road 105#, Haidian District, Beijing, 100048, China
| | - Yan Hong Li
- College of Life Science, Capital Normal University, Xisanhuan North Road 105#, Haidian District, Beijing, 100048, China.
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Yarte ME, Gismondi MI, Llorente BE, Larraburu EE. Isolation of endophytic bacteria from the medicinal, forestal and ornamental tree Handroanthus impetiginosus. ENVIRONMENTAL TECHNOLOGY 2022; 43:1129-1139. [PMID: 32875965 DOI: 10.1080/09593330.2020.1818833] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 08/27/2020] [Indexed: 05/20/2023]
Abstract
Plant interactions with endophytic bacteria produce mutual benefits and contribute to environmental sustainability. Handroanthus impetiginosus (Mart. ex DC.) Mattos 'pink lapacho' (syn. Tabebuia impetiginosa, Bignoniaceae) is a medicinal, ornamental and forestal native tree from South and Mesoamerica. Plant growth promoting bacteria (PGPB) isolated from pink lapacho are scarcely described. The aim of this work was to isolate and characterize native endophytic bacteria from pink lapacho. Ten bacterial strains were isolated from leaves and six from roots of naturally growing trees in Luján (Central-Eastern region of Argentina). Endophytes were identified as Bacillus, Paenibacillus, Pseudomonas, Rhizobium, Rummeliibacillus and Methylobacterium genera, according to 16S rRNA gene sequencing and phylogenetic analysis. In the present study, a strain of the Rummelibacillus genus (L14) has been first ever reported as endophyte. This strain was capable of growing in Nfb medium and exhibited zinc solubilization ability. A high percentage of strains showed PGPB traits; namely 88% fixed nitrogen, 63% solubilized zinc, 69% solubilized phosphate and 63% produced indole compounds such as IAA. Most strains were salt tolerant that confer them a potential competitive advantage to survive in saline conditions. To the best of our knowledge, this is the first study reporting an approach to assess the diversity of cultivable endophytic bacteria of H. impetiginosus tree and its plant growth promoting capacity. The knowledge about this kind of associations could contribute to environmental sustainability by developing effective biofertilizers that minimize the use of chemical fertilizers and pesticides.
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Affiliation(s)
- Mauro Enrique Yarte
- Laboratorio de Cultivo de tejidos Vegetales, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - María Inés Gismondi
- Laboratorio de Cultivo de tejidos Vegetales, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Berta Elizabet Llorente
- Laboratorio de Cultivo de tejidos Vegetales, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Argentina
| | - Ezequiel Enrique Larraburu
- Laboratorio de Cultivo de tejidos Vegetales, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
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Gupta R, Anshu, Noureldeen A, Darwish H. Rhizosphere mediated growth enhancement using phosphate solubilizing rhizobacteria and their tri-calcium phosphate solubilization activity under pot culture assays in Rice ( Oryza sativa.). Saudi J Biol Sci 2021; 28:3692-3700. [PMID: 34220220 PMCID: PMC8241618 DOI: 10.1016/j.sjbs.2021.05.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 05/19/2021] [Accepted: 05/20/2021] [Indexed: 12/04/2022] Open
Abstract
Phosphate solubilizing rhizobacteria are considered as an important alternative to increase the availability of accumulated phosphates through solubilization. These increase the growth of plant by enhancing the efficiency of fixing biological nitrogen. This was studied through a pot experiment involving two Phosphate Solubilizing Rhizobacteria (PSRB) isolates, Pseudomonas aeruginosa and Bacillus subtilis along with Tri-calcium phosphate (TCP) on availibity of nutrients, biological composition of soil and yield attributes of rice crop at its growth stages. Experiment was laid in factorial completely randomized design (CRD) comprising of eight treatments replicated thrice with two factors viz. factor 1 with or without TCP (1 g−1soil) and factor 2 with single or combined inoculation of PSRB isolates. Considerable enhancement in available content of potassium (K), phosphorous (P), nitrogen (N) in soil was found with TCP 1 g−1soil (P1) and consortium of Pseudomonas aeruginosa and Bacillus subtilis broth culture at crop growth stages. Highest increase in available N (17.13% and 19.1%), available P (232% and 265%), available K (19.6% and 29.2%) over control were recorded in B3 (consortium of Pseudomonas aeruginosa and Bacillus subtilis broth culture). Similarly, maximum nutrient uptake N (6.4%), P (15.8%) and K (8.9%) were recorded with same treatment. A considerable growth in soil microbial biomass carbon and dehydrogenase activity at crop growth stages was recorded on application of TCP 1 g−1soil (P1) and consortium of PSRB isolates' Pseudomonas aeruginosa and Bacillus subtilis (B3). Highest increase in microbial biomass carbon (16.4% and 16.5%) and dehydrogenase activity 34.7% and 43.8% over control were recorded in B3 (consortium of PSRB isolates Pseudomonas aeruginosa and Bacillus subtilis) and was found best among all treatments in terms of yield (63.2%) and yield attributes; number of panicles−1plant (54.8%), number of grains−1panicle (156%) and average panicle length (63.9%).
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Affiliation(s)
- Renu Gupta
- Division of Soil Science and Agriculture Chemistry, Sher-e-Kashmir University of Agricultural Sciences and Technology, Chatha, Jammu, India
| | - Anshu
- Division of Soil Science and Agriculture Chemistry, Sher-e-Kashmir University of Agricultural Sciences and Technology, Chatha, Jammu, India
| | - Ahmed Noureldeen
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Hadeer Darwish
- Department of Biotechnology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
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Kaur R, Kaur S. Variation in the Phosphate Solubilizing Bacteria from Virgin and the Agricultural Soils of Punjab. Curr Microbiol 2020; 77:2118-2127. [PMID: 32529483 DOI: 10.1007/s00284-020-02080-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 06/04/2020] [Indexed: 10/24/2022]
Abstract
Bacteria with phosphorus (P) solubilization potential are considered vital in promoting bioavailability of phosphorus in soil. The present study was conducted to isolate and study the variation of phosphate solubilizing potential of bacteria isolated from virgin and agricultural soils. Total 30 isolates from virgin soil and 4 isolates from agricultural soil which retained their activity on repeated subculturing were selected. Among the isolates, there was insignificant difference in the total bacterial count from virgin and agricultural soils, however, a significant difference was found in the phosphate solubilizing bacteria (PSB) count and their P solubiling potential. Soil organic matter and available P content were correlated with PSB count. The mean solubilization index (SI) was higher from the isolates from virgin soils. Equal distribution method was employed to categorize the bacterial isolates into low, medium, and high P solubilizers which depicted H ≥ 89.44 and L ≤ 68. Among all the isolates, 23.53% were high P solubilizers (P-89.44-110.88 µg/ml), 55.88% were medium P solubilizers (P- 68-89.44 µg/ml), and 20.58% isolates produced low soluble P (46.56-68 µg/ml). Analysis of the data showed that all the isolates categorized under high P solubilizers belonged to the virgin soil. The isolates were characterized based upon biochemical characterization and belonged to Pseudomonadaceae, Enterobacteriaceae, Bacillaceae, Paenibacillaceae, Micrococcaceae, Burkholderiaceae, Flavobacteriaceae, and Streptococcaceae families. 16 sRNA sequencing of the two isolates showing maximum P solubilization were characterized as Enterobacter hormaechi. However, they differ appreciably in their P solubilization at different temperatures.
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Affiliation(s)
- Rajinder Kaur
- Department of Biotechnology, Chandigarh University, Gharaun, Mohali, Punjab, 140413, India
| | - Sukhminderjit Kaur
- Department of Biotechnology, Chandigarh University, Gharaun, Mohali, Punjab, 140413, India.
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Langella F, Grawunder A, Stark R, Weist A, Merten D, Haferburg G, Büchel G, Kothe E. Microbially assisted phytoremediation approaches for two multi-element contaminated sites. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 21:6845-6858. [PMID: 24081921 DOI: 10.1007/s11356-013-2165-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 09/11/2013] [Indexed: 06/02/2023]
Abstract
Phytoremediation is an environmental friendly, cost-effective technology for a soft restoration of abandoned mine sites. The grasses Agrostis capillaris, Deschampsia flexuosa and Festuca rubra, and the annual herb Helianthus annuus were combined with microbial consortia in pot experiments on multi-metal polluted substrates collected at a former uranium mine near Ronneburg, Germany, and a historic copper mine in Kopparberg, Sweden, to test for phytoextraction versus phytostabilization abilities. Metal uptake into plant biomass was evaluated to identify optimal plant-microbe combinations for each substrate. Metal bioavailability was found to be plant species and element specific, and influenced by the applied bacterial consortia of 10 strains, each isolated from the same soil to which it was applied. H. annuus showed high extraction capacity for several metals on the German soil independent of inoculation. Our study could also show a significant enhancement of extraction for F. rubra and A. capillaris when combined with the bacterial consortium, although usually grasses are considered metal excluder species. On the Swedish mixed substrate, due to its toxicity, with 30 % bark compost, A. capillaris inoculated with the respective consortium was able to extract multi-metal contaminants.
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Affiliation(s)
- Francesca Langella
- Institute of Microbiology, Microbial Communication, Friedrich Schiller University, Neugasse 25, 07743, Jena, Germany
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. L, Yadav J, Verma JP. Isolation and Characterization of Effective Plant Growth Promoting Rhizobacteria from Rice Rhizosphere of Indian Soil. ACTA ACUST UNITED AC 2012. [DOI: 10.3923/ajbs.2012.294.303] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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