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https://www.readbyqxmd.com/read/28723242/interspecific-and-intraspecific-hybrid-epichlo%C3%A3-species-symbiotic-with-the-north-american-native-grass-poa-alsodes
#1
Tatsiana Shymanovich, Nikki D Charlton, Ashleigh M Musso, Jonathan Scheerer, Nadja B Cech, Stanley H Faeth, Carolyn A Young
The endophyte presence and diversity in natural populations of Poa alsodes were evaluated along a latitudinal transect from the southern distribution range in North Carolina to New York. Two distinct Epichloë hybrid taxa were identified from 23 populations. Each taxon could easily be distinguished by polymerase chain reaction (PCR) genotyping with primers designed to mating type genes and alkaloid biosynthesis genes that encode key pathway steps for ergot alkaloids, indole-diterpenes, lolines, and peramine...
June 26, 2017: Mycologia
https://www.readbyqxmd.com/read/28720979/first-report-of-phyllosticta-citricarpa-and-description-of-two-new-species-p-%C3%A2-paracapitalensis-and-p-%C3%A2-paracitricarpa-from-citrus-in-europe
#2
V Guarnaccia, J Z Groenewald, H Li, C Glienke, E Carstens, V Hattingh, P H Fourie, P W Crous
The genus Phyllosticta occurs worldwide, and contains numerous plant pathogenic, endophytic and saprobic species. Phyllosticta citricarpa is the causal agent of Citrus Black Spot disease (CBS), affecting fruits and leaves of several citrus hosts (Rutaceae), and can also be isolated from asymptomatic citrus tissues. Citrus Black Spot occurs in citrus-growing regions with warm summer rainfall climates, but is absent in countries of the European Union (EU). Phyllosticta capitalensis is morphologically similar to P...
June 2017: Studies in Mycology
https://www.readbyqxmd.com/read/28717232/the-epichlo%C3%A3-festucae-antifungal-protein-has-activity-against-the-plant-pathogen-sclerotinia-homoeocarpa-the-causal-agent-of-dollar-spot-disease
#3
Zipeng Tian, Ruying Wang, Karen V Ambrose, Bruce B Clarke, Faith C Belanger
Epichloë spp. are naturally occurring fungal endophytic symbionts of many cool-season grasses. Infection by the fungal endophytes often confers biotic and abiotic stress tolerance to their hosts. Endophyte-mediated disease resistance is well-established in the fine fescue grass Festuca rubra subsp. rubra (strong creeping red fescue) infected with E. festucae. Resistance to fungal pathogens is not an established effect of endophyte infection of other grass species, and may therefore be unique to the fine fescues...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28711791/labeled-azospirillum-brasilense-wild-type-and-excretion-ammonium-strains-in-association-with-barley-roots
#4
Adrian Richard Schenberger Santos, Rafael Mazer Etto, Rafaela Wiegand Furmam, Denis Leandro de Freitas, Karina Freire d'Eça Nogueira Santos, Emanuel Maltempi de Souza, Fábio de Oliveira Pedrosa, Ricardo Antônio Ayub, Maria Berenice Reynaud Steffens, Carolina Weigert Galvão
Soil bacteria colonization in plants is a complex process, which involves interaction between many bacterial characters and plant responses. In this work, we labeled Azospirillum brasilense FP2 (wild type) and HM053 (excretion-ammonium) strains by insertion of the reporter gene gusA-kanamycin into the dinitrogenase reductase coding gene, nifH, and evaluated bacteria colonization in barley (Hordeum vulgare). In addition, we determined inoculation effect based on growth promotion parameters. We report an uncommon endophytic behavior of A...
July 4, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28710400/molecular-inter-kingdom-interactions-of-endophytes-isolated-from-lychnophora-ericoides
#5
Andrés M Caraballo-Rodríguez, Pieter C Dorrestein, Monica T Pupo
The importance of microbial natural products has been widely demonstrated in the search for new antibiotics. However, the functional role of microbial metabolites in nature remains to be deciphered. Several natural products are known to mediate microbial interactions through metabolic exchange. One approach to investigate metabolic exchange in the laboratory is through microbial interactions. Here, we describe the chemical study of selected endophytes isolated from the Brazilian medicinal plant Lychnophora ericoides by pairwise inter-kingdom interactions in order to correlate the impact of co-cultivation to their metabolic profiles...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28708056/metarhizium-robertsii-produces-indole-3-acetic-acid-which-promotes-root-growth-in-arabidopsis-and-enhances-virulence-to-insects
#6
Xinggang Liao, Brian Lovett, Weiguo Fang, Raymond J St Leger
The plant root colonizing insect-pathogenic fungus Metarhizium robertsii has been shown to boost plant growth, but little is known about the responsible mechanisms. Here we show that M. robertsii promotes lateral root growth and root hair development of Arabidopsis seedlings in part through an auxin [indole-3-acetic acid (IAA)]-dependent mechanism. M. robertsii, or its auxin-containing culture filtrate promoted root proliferation, activated IAA-regulated gene expression and rescued the root hair defect of the IAA-deficient rhd6 Arabidopsis mutant...
July 15, 2017: Microbiology
https://www.readbyqxmd.com/read/28705394/melanization-and-ageing-are-not-drawbacks-for-successful-agro-transformation-of-dark-septate-endophytes
#7
Charlotte Berthelot, Yoann Perrin, Corinne Leyval, Damien Blaudez
Dark septate endophytes (DSEs) are melanin-enriched ascomycetous fungi that are abundant in stressed environments. However, little is known about their physiology and metabolism, and DSE genes have not been functionally characterized yet. Therefore developing molecular genetic tools to investigate the biological function of genes of interest in DSEs is of major significance. We investigated Agrobacterium tumefaciens-mediated transformation (ATMT) efficiency in eight DSE strains belonging to Cadophora sp., Cadophora malorum, Leptodontidium sp...
August 2017: Fungal Biology
https://www.readbyqxmd.com/read/28705392/phylogenetic-and-phenotypic-characterisation-of-sirococcus-castaneae-comb-nov-synonym-diplodina-castaneae-a-fungal-endophyte-of-european-chestnut
#8
Joana B Meyer, Estefanía Trapiello, Beatrice Senn-Irlet, Thomas N Sieber, Carolina Cornejo, Dilzara Aghayeva, Ana J González, Simone Prospero
In this paper we resolve the taxonomic status of the fungus Diplodina castaneae (Ascomycetes, Diaporthales, Gnomoniaceae) which occurs on the European chestnut (Castanea sativa) as endophyte and as the causal agent of Javart disease. Specimens from Switzerland, Spain, and Azerbaijan were sequenced at five nuclear loci (β-tubulin, EF-1α, ITS, LSU, and RPB2). Phylogenies were inferred to place D. castaneae in the Gnomoniaceae family. Moreover, growth rates and morphological characteristics on different agar media were assessed and compared to those of Gnomoniopsis castaneae, which can easily be confused with D...
August 2017: Fungal Biology
https://www.readbyqxmd.com/read/28704977/a-new-n-methoxypyridone-from-the-co-cultivation-of-hawaiian-endophytic-fungi-camporesia-sambuci-ft1061-and-epicoccum-sorghinum-ft1062
#9
Chunshun Li, Ariel M Sarotti, Baojun Yang, James Turkson, Shugeng Cao
A new N-methoxypyridone analog (1), together with four known compounds, was isolated from the co-culture of Hawaiian endophytic fungi Camporesia sambuci FT1061 and Epicoccum sorghinum FT1062. The structure of the new compound was elucidated as 11S-hydroxy-1-methoxyfusaricide (1) by extensive spectroscopic analysis and comparison with the literature. The absolute configuration of 1 was determined by comparison with the experimental and calculated ECD spectra. The absolute configuration of compound 3 was investigated and renamed as (+)-epipyridone by comparison of the optical rotation and CD spectrum with those of 1...
July 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28704049/phylogenomics-of-2-4-diacetylphloroglucinol-producing-pseudomonas-and-novel-antiglycation-endophytes-from-piper-auritum
#10
Karina Gutiérrez-García, Adriana Neira-González, Rosa Martha Pérez-Gutiérrez, Giovana Granados-Ramírez, Ramon Zarraga, Kazimierz Wrobel, Francisco Barona-Gómez, Luis B Flores-Cotera
2,4-Diacetylphloroglucinol (DAPG) (1) is a phenolic polyketide produced by some plant-associated Pseudomonas species, with many biological activities and ecological functions. Here, we aimed at reconstructing the natural history of DAPG using phylogenomics focused at its biosynthetic gene cluster or phl genes. In addition to around 1500 publically available genomes, we obtained and analyzed the sequences of nine novel Pseudomonas endophytes isolated from the antidiabetic medicinal plant Piper auritum. We found that 29 organisms belonging to six Pseudomonas species contain the phl genes at different frequencies depending on the species...
July 13, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28702707/host-specificity-of-endophytic-mycobiota-of-wild-nicotiana-plants-from-arid-regions-of-northern-australia
#11
Khondoker M G Dastogeer, Hua Li, Krishnapillai Sivasithamparam, Michael G K Jones, Stephen J Wylie
In arid regions of northern Australia, plants survive under water deficit, high temperatures, intense solar radiation and nutrient-impoverished soils. They employ various morpho-physiological and biochemical adaptations including interaction with microbial symbionts. We evaluated identity, host and tissue association with geographical distribution of fungal endophytes isolated from above- and below-ground tissues of plants of three indigenous Australian Nicotiana species. Isolation frequency and α-diversity were significantly higher for root endophyte assemblages than those of stem and leaf tissues...
July 13, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28701877/endophytic-fungi-harbored-in-panax-notoginseng-diversity-and-potential-as-biological-control-agents-against-host-plant-pathogens-of%C3%A2-root-rot-disease
#12
You-Kun Zheng, Cui-Ping Miao, Hua-Hong Chen, Fang-Fang Huang, Yu-Mei Xia, You-Wei Chen, Li-Xing Zhao
BACKGROUND: Endophytic fungi play an important role in balancing the ecosystem and boosting host growth. In the present study, we investigated the endophytic fungal diversity of healthy Panax notoginseng and evaluated its potential antimicrobial activity against five major phytopathogens causing root-rot of P. notoginseng. METHODS: A culture-dependent technique, combining morphological and molecular methods, was used to analyze endophytic fungal diversity. A double-layer agar technique was used to challenge the phytopathogens of P...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28699863/parapedobacter-deserti-sp-nov-an-endophytic-bacterium-isolated-from-haloxylon-ammodendron-stems
#13
Lei Liu, Lubin Li, Zheng Song, Shiyan Wang, Jun Zhang, Xiaoxia Zhang, Qiwu Sun
Strain N5SSJ16T, a Gram-negative-staining, non-spore-forming, rod-shaped, non-motile bacterium, was isolated from Haloxylon ammodendron stems. The strain grew in the presence of 0-4 % (w/v) NaCl (optimum growth in the absence of NaCl), at pH 7-9 (optimum: pH 8) and at 12-50 °C. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain N5SSJ16T was related phylogenetically to Parapedobacter composti 4M40T (96.5 %) and Parapedobacter luteus 4M29T (95.9 %). The cellular fatty acids were iso-C15 : 0, summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), summed feature 9 (C16 : 0 10-methyl and/or iso-C17 : 1ω9c) and iso-C17 : 0 3-OH...
July 13, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28699782/bacterial-siderophores-promote-plant-growth-screening-of-catechol-and-hydroxamate-siderophores
#14
Anna Grobelak, Joanna Hiller
The aim of the study was to determine the quality and quantity of siderophores produced by bacteria isolated from plants' roots. The second aim was to determine the effect of siderophores on plants growth (Festuca rubra L. and Brassica napus L.). The study was carried out using bacteria isolated from roots of: Arabidopsis thaliana L., F. rubra, and Agrostis capillaris L., growing on the heavy metals contaminated area. The chrome azurol sulfonate (CAS) test, Arnow's test for catechol siderophores, and Csaksy's test for hydroxamate siderophores were performed...
September 2, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28699116/high-taxonomic-diversity-of-cultivation-recalcitrant-endophytic-bacteria-in-grapevine-field-shoots-their-in-vitro-introduction-and-unsuspected-persistence
#15
Pious Thomas, Aparna C Sekhar, Sadiq Pasha Shaik
Molecular and microscopic analyses reveal enormous non-cultivable endophytic bacteria in grapevine field shoots with functional significance. Diverse bacteria enter tissue cultures through surface-sterilized tissues and survive surreptitiously with varying taxonomic realignments. The study was envisaged to assess the extent of endophytic bacterial association with field shoot tissues of grapevine and the likelihood of introduction of such internally colonizing bacteria in vitro adopting molecular techniques targeting the non-cultivable bacterial community...
July 11, 2017: Planta
https://www.readbyqxmd.com/read/28698913/antibacterial-and-antioxidant-constituents-of-extracts-of-endophytic-fungi-isolated-from-ocimum-basilicum-var-thyrsiflora-leaves
#16
Piyamas Atiphasaworn, Sakon Monggoot, Eleni Gentekaki, Siraprapa Brooks, Patcharee Pripdeevech
Fourteen fungal endophytes were isolated from the Ocimum basilicum var. thyrsiflora leaves collected from Northern Thailand. Eight genera were identified including Aspergillus, Ascochyta, Nigrospora, Blastomyces, Colletotrichum, Exidia, Clitopilus, and Nomuraea. The antibacterial activity of crude extracts from all endophytic fungi was tested against nine human bacterial pathogens: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis, Bacillus cereus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Vibrio cholerae, and Vibrio parahaemolyticus...
July 12, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28697923/%C3%AE-pyrone-derivatives-with-cytotoxic-activities-from-the-endophytic-fungus-phoma-sp-yn02-p-3
#17
Xia-Nan Sang, Shao-Fei Chen, Ming-Xu Tang, Hai-Feng Wang, Xiao An, Xiao-Jie Lu, Dan Zhao, Yu-Bo Wang, Jiao Bai, Hui-Ming Hua, Gang Chen, Yue-Hu Pei
Four new α-pyrone derivatives phomones C-F (1-4) together with four known compounds (5-8) were isolated from the endophytic fungus Phoma sp. YN02-P-3. Compound 1 is the first example of 6-α,β-unsaturated ester-2-pyrone dimers via intermolecular symmetrical [2+2] cycloaddition. The chemical structures of these compounds were determined from spectroscopic data (1D/2D NMR, MS and IR). The acetylated product (9) of 1 along with compounds 1-8 were then tested for their cytotoxicity against HL-60, PC-3 and HCT-116 cell lines...
June 29, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28696572/evaluation-of-electrical-impedance-spectroscopy-on-a-needle-as-a-novel-tool-to-determine-optimal-surgical-margin-in-partial-nephrectomy
#18
Hyeon Woo Kim, Joho Yun, Jeong Zoo Lee, Dong Gil Shin, Jong-Hyun Lee
A hypodermic needle has been introduced incorporating an electrical impedance spectroscopy (EIS) sensor, called micro-EIS-on-a-needle for depth profiling (μEoN-DP). The μEoN-DP can locate endophytic renal tumors as well as determine tumor margins by detecting the impedance difference between normal and cancer tissues. To evaluate the μEoN-DP as a novel tool to determine the optimal surgical margin during partial nephrectomy (PN), the electrical impedance differences between renal parenchymal tissues and renal cell carcinoma (RCC) tumors are investigated with regard to the distance from the tumors...
July 11, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28695453/renal-epithelioid-angiomyolipoma-mri-findings
#19
Yan Zhong, Yanguang Shen, Jingjing Pan, Yingwei Wang, Yunxia An, Aitao Guo, Lu Ma, Huiyi Ye, Haiyi Wang
PURPOSE: To retrospectively analyze the MR imaging presentation of renal epithelioid angiomyolipoma (EAML). METHODS: Retrospective analysis revealed 12 subjects with histologically proven renal EAML who underwent preoperative MRI at our institution between January 2009 and June 2016. Two radiologists reviewed the images in consensus, describing MR imaging features including size, location, growth pattern, signal intensity of tumor, and dynamic enhancement pattern...
July 10, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28695409/selection-and-validation-of-reference-genes-for-rt-qpcr-indicates-that-juice-of-sugarcane-varieties-modulate-the-expression-of-c-metabolism-genes-in-the-endophytic-diazotrophic-herbaspirillum-rubrisubalbicans-strain-hcc103
#20
Valéria Polese, Cleiton de Paula Soares, Paula Renata Alves da Silva, Jean Luiz Simões-Araújo, José Ivo Baldani, Marcia Soares Vidal
Quantitative reverse transcription PCR (RT-qPCR) is an important tool for evaluating gene expression. However, this technique requires that specific internal normalizing genes be identified for different experimental conditions. To date, no internal normalizing genes are available for validation of data analyses for Herbaspirillum rubrisubalbicans strain HCC103, an endophyte that is part of the sugarcane consortium inoculant. This work seeks to identify and evaluate suitable reference genes for gene expression studies in HCC103 grown until middle log phase in sugarcane juice obtained from four sugarcane varieties or media with three different carbon sources...
July 10, 2017: Antonie Van Leeuwenhoek
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