Seasonal and regional diversity of maple sap microbiota revealed using community PCR fingerprinting and 16S rRNA gene clone libraries

Filteau, Marie; Lagacé, Luc; LaPointe, Gisèle; Roy, Denis

doi:10.1016/j.syapm.2010.02.003

Cited by 32 publications

(30 citation statements)

References 26 publications

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“…NF-bands showed greatest similarity to Pseudomonas fluorescens and Pseudomonas sp. coming from cold environments such as alpine glacier (Accession n. HQ824870, submitted by Lee et al, 2011), Quebec province, Canada (isolates submitted by Filteau et al, 2010) as well as Antarctica (accession n. KC433652, HG518622 identified as Pseudomonas sp. and Pseudomonas antarctica, respectively).…”

Section: Dgge Bandmentioning

confidence: 99%

Rhizospheric changes of fungal and bacterial communities in relation to soil health of multi-generation apple orchards

et al. 2015

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Section: Dgge Bandmentioning

confidence: 99%

Rhizospheric changes of fungal and bacterial communities in relation to soil health of multi-generation apple orchards

et al. 2015

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“…The selected bacterial isolates belonged to the abundant genera Bacillus, Pseudomonas, and Paenibacillus that have already been identified in the culture-independent exploration (Drage et al, 2014). These form a major group of endophytic bacteria that have been isolated as endophytes from various plant species, encompassing diverse plants such as trees and aquatic plants, but can occur also as saprophytes and pathogens (O'Neill et al, 1992;Shishido et al, 1995;Cankar et al, 2005;Ferreira et al, 2008;Izumi et al, 2008;Ulrich et al, 2008a,b;Khan and Doty, 2009;Pardatscher and Schweigkofler, 2009;Filteau et al, 2010;Chen et al, 2012). Bacillus simplex is not only a human pathogen but can also occur in soils and forms associations with arbuscular mycorrhizal fungi (Lecomte et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…The genus Curtobacterium was also isolated as endophyte from Eucalyptus, Populus, and Ulmus (Mocali et al, 2003;Ulrich et al, 2008b), but occurs also as a common plant pathogen; especially C. flaccumfaciens is well documented to occur worldwide (Osdaghi et al, 2016). Rahnella was isolated as endophyte from temperate trees, sweet potatoes and Polygonum and as rhizosphere bacterium with plant growth promoting activities (Cankar et al, 2005;Taghavi et al, 2009;Filteau et al, 2010). Pantoea belongs to an ubiquitously occurring opportunistic endophyte genus (Wang et al, 2006;Doty et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial Drimane Sesquiterpenes Contribute to Balanced Antagonism but Do Not Structure Bacterial and Fungal Endophytes in the African Pepper Bark Tree Warburgia ugandensis

et al. 2017

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The African pepper bark tree, Warburgia ugandensis, accumulates antimicrobial drimane sesquiterpenes in all of its organs. One hypothesis states that plant defense compounds determine endophyte community structure. Another hypothesis suggests that they just facilitate the endophytic lifestyle by exerting a balanced antagonism. To explore this, a representative selection of endophytic bacterial and fungal isolates from this tree species was assayed together with six non-endophytic strains to determine their tolerance and susceptibility to the root and leaf extract fraction containing high and low drimane sesquiterpene amounts respectively. Inhibitory effects were explored by assessing both growth and growth efficiency, the latter of which relates respiratory activity to growth. The susceptibility of the tested strains showed considerable variation and the obtained patterns did not allow a clear distinction between root and leaf endophytes as well as endophytes and non-endophytes. In addition, all strains were also assayed against juglone, an antimicrobial and redox-active aromatic naphthoquinone. A comparison of differential pulse voltammograms and efficacy in variants of the deoxyribose degradation assay revealed that drimane sesquiterpenes possess anti-and pro-oxidant activities that compare to those of juglone. Leaf endophytes showed higher resistance to oxidative stress than root endophytes, quite contrary to the actual exposure. The obtained results support the notion that structural diverse plant defense compounds can contribute to a balanced antagonism against but not to structuring of endophyte communities. Oxidative stress seems to be involved in generating this effect albeit it cannot explain it alone.

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“…The microbial community was tested by 16S rDNA gene clone library, DNA sequencing, alignment, and phylogenetic analysis according to the reported method [15]. Aiming to compound a nutrient liquid to stimulate the indigenous bacteria, the community consisted was studied by the above method.…”

Section: Microbial Community Structure Analysis Of the Test Wellmentioning

confidence: 99%

Partial Purification and Chemical Characterization of a Bioemulsifier and Its Application in MEOR

Dong

Wang

Cai

et al. 2015

Lecture Notes in Electrical Engineering

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The bioemulsifier secreted by strain XS2, which was isolated from oil-contaminated soil samples in Yumen oil field, China, was partially purified and analyzed. Protease hydrolysis and heat treatment results showed that the protein composition of the bioemulsifier played a significant role in emulsification activity. High-performance liquid chromatography (HPLC) study suggested that the protein composition may exist as glycoprotein. Monosaccharide analysis by gas chromatograph-mass spectrometer (GC-MS) showed that galactose, glucose, xylose, and mannose presented in the bioemulsifier. The emulsification activity of this bioemulsifier was relatively high due to different carbohydrates (n-hexadecane 61 %, liquid paraffin 60 %, Toluene 77 %). Furthermore, single well stimulation trial in Changqing oil field, was done to explore the potential application in Microbial-enhanced oil recovery (MEOR). Up to September 2014, the cumulative increased crude oil production was about 88 T in total 240 days, and the water content of the well-produced liquid decreased from 85 to 25 %. These data illustrated that the bioemulsifier performed a high potential in applications and had important economic values.Keyword Bioemulsifier Á XS2 Á Chemical characterization Á MEOR Á Single well stimulation D. Dong and X. Wang are contributed equally to this work.

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Seasonal and regional diversity of maple sap microbiota revealed using community PCR fingerprinting and 16S rRNA gene clone libraries

Cited by 32 publications

References 26 publications

Rhizospheric changes of fungal and bacterial communities in relation to soil health of multi-generation apple orchards

Rhizospheric changes of fungal and bacterial communities in relation to soil health of multi-generation apple orchards

Antimicrobial Drimane Sesquiterpenes Contribute to Balanced Antagonism but Do Not Structure Bacterial and Fungal Endophytes in the African Pepper Bark Tree Warburgia ugandensis

Partial Purification and Chemical Characterization of a Bioemulsifier and Its Application in MEOR

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