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https://www.readbyqxmd.com/read/29150804/using-citrus-aurantifolia-essential-oil-for-the-potential-biocontrol-of-colocasia-esculenta-taro-leaf-blight-caused-by-phytophthora-colocasiae
#1
Séverin Nguemezi Tchameni, Staelle Njamou Mbiakeu, Modeste Lambert Sameza, Pierre Michel Dongmo Jazet, François Tchoumbougnang
The aim of this work was to evaluate the antimicrobial activities of leaves and epicarp of Citrus aurantifolia essential oil against Phytophthora colocasiae, the causative agent of taro leaf blight. Oils were extracted by hydrodistillation, and their chemical composition was determined by gas chromatography and gas chromatography coupled with mass spectrometry. Antimicrobial activities of oils were tested in vitro against mycelium growth and sporangium production. In situ tests were done on healthy taro leaves, and the necrosis symptoms were evaluated...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29150754/detoxification-of-aflatoxin-b1-by-antifungal-compounds-from-lactobacillus-brevis-and-lactobacillus-paracasei-isolated-from-dairy-products
#2
Eman Zakaria Gomaa, Manal Farouk Abdelall, Omima Mohammed El-Mahdy
Aflatoxins are a large group of highly toxic, mutagenic, and carcinogenic mycotoxins produced by specific species of fungi. Potential contamination of food commodities by these compounds causes extensive damage that lead to great economic losses. This study explored the potential use of antifungal compounds, produced by Lactobacillus brevis and Lactobacillus paracasei, for growth inhibition and subsequent aflatoxin B1 production from select strains of Aspergillus flavus and Aspergillus parasiticus. Lactobacilli strains were isolated from traditional Egyptian dairy products, whereas fungal strains were isolated from infected cereal seeds...
November 18, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29144232/saccharopolyspora-aidingensis-sp-nov-an-actinomycete-isolated-from-a-salt-lake
#3
Zhan-Feng Xia, Xiao-Xia Luo, Chuan-Xing Wan, Li-Li Zhang
A novel halophilic actinomycete strain, designated TRM 46074(T), was isolated from Aiding salt lake in Turpan Basin, north-west China. Strain TRM 46074(T) was aerobic, Gram-stain-positive and grew optimally with 12 % (w/v) NaCl. The strain was observed to produce sparse aerial mycelium with long chains of spores that were non-motile and oval or spherical in shape with a rough or smooth surface; substrate mycelium was branched and well developed. The cell wall was determined to contain meso-diaminopimelic acid; the diagnostic whole-cell sugars were galactose, arabinose and ribose...
March 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29139256/-correlative-analysis-advance-of-chemical-constituents-of-polyporus-umbellatus-and-armillaria-mellea
#4
REVIEW
Jing-Wen Huang, Chang-Jiang-Sheng Lai, Yuan Yuan, Min Zhang, Jun-Hui Zhou, Lu-Qi Huang
Medicinal Polyporus umbellatus is the dry sclerotia of P. umbellatus, with the effect of diuresis; Armillaria mellea is a parasitic fungus which can infect plants up to 300 genera, with sedative, anticonvulsant and some other biological activities. As the medicinal value of P. umbellatus and A. mellea is increasingly wide concerned, the market quantity demanded of them is gradually increased and the demand outstrips the supply. The symbiotic A. mellea and P. umbellatus are both the medicinal and edible fungi with diverse activities, including hypoglycemic action, improve immunity and antitumor and so on...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29138630/proteomic-analysis-of-coprinopsis-cinerea-under-conditions-of-horizontal-and-perpendicular-gravity
#5
Ji-Su Kim, Young-Sang Kwon, Dong-Won Bae, Youn-Sig Kwak, Yong-Bum Kwack
Coprinopsis cinerea was employed to investigate the fungal response to gravity. Mycelium growth revealed a consistent growth pattern, irrespective of the direction of gravity (i.e., horizontal vs. perpendicular). However, the fruiting body grew in the direction opposite to that of gravity once the primordia had formed. For the proteomic analysis, only curved-stem samples were used. Fifty-one proteins were identified and classified into 13 groups according to function. The major functional groups were hydrolases and transferases (16%), signal transduction (15%), oxidoreductases and isomerases (11%), carbohydrate metabolism (9%), and transport (5%)...
September 2017: Mycobiology
https://www.readbyqxmd.com/read/29124530/fungus-farming-termites-selectively-bury-weedy-fungi-that-smell-different-from-crop-fungi
#6
Lakshya Katariya, Priya B Ramesh, Thejashwini Gopalappa, Sathish Desireddy, Jean-Marie Bessière, Renee M Borges
Mutualistic associations such as the fungal farms of insects are prone to parasitism and are consequently vulnerable to attack by weeds and pests. Therefore, efficient farm management requires quick detection of weeds for their elimination. Furthermore, if the available weedicides are non-specific, then the ability of insects to discriminate between crop and weeds becomes essential for targeted application of such compounds. Here, we demonstrate for the first time in fungus-farming insects, that worker castes of the fungus-growing termite Odontotermes obesus discriminate between their crop (Termitomyces) and the weedy (Pseudoxylaria) fungi, even if exposed to only fungal scents...
November 9, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29123127/a-mechanism-for-ftsz-independent-proliferation-in-streptomyces
#7
Fernando Santos-Beneit, David M Roberts, Stuart Cantlay, Joseph R McCormick, Jeff Errington
The central player in bacterial cell division, FtsZ, is essential in almost all organisms in which it has been tested, with the most notable exception being Streptomyces. Streptomycetes differ from many bacteria in growing from the cell tip and undergoing branching, similar to filamentous fungi. Here we show that limited cell damage, either mechanical or enzymatic, leads to near complete destruction of mycelial microcolonies of a Streptomyces venezuelae ftsZ mutant. This result is consistent with a lack of ftsZ-dependent cross-walls and may be inconsistent with a recently proposed role for membrane structures in the proliferation of ftsZ mutants in other Streptomyces species...
November 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/29117447/toxic-reagents-and-expensive-equipment-are-they-really-necessary-for-the-extraction-of-good-quality-fungal-dna
#8
P Rodrigues, A Venâncio, N Lima
The aim of this work was to evaluate a fungal DNA extraction procedure with the lowest inputs in terms of time as well as of expensive and toxic chemicals, but able to consistently produce genomic DNA of good quality for PCR purposes. Two types of fungal biological material were tested - mycelium and conidia - combined with two protocols for DNA extraction using Sodium Dodecyl Sulphate [SDS] and Cetyl Trimethyl Ammonium Bromide [CTAB] as extraction buffers and glass beads for mechanical disruption of cell walls...
November 8, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29109367/asperflavin-an-anti-inflammatory-compound-produced-by-a-marine-derived-fungus-eurotium-amstelodami
#9
Xiudong Yang, Min-Cheol Kang, Yong Li, Eun-A Kim, Sung-Myung Kang, You-Jin Jeon
In the present study, 16 marine-derived fungi were isolated from four types of marine materials including float, algae, animals and drift woods along with the coast of Jeju Island, Korea and evaluated for anti-inflammatory effects in lipopolysaccharide (LPS)-stimulated RAW 24.7 cells. The broth and mycelium extracts from the 16 fungi were prepared and the broth extract (BE) of Eurotium amstelodami (015-2) inhibited nitric oxide (NO) production in LPS-stimulated RAW 264.7 cells without cytotoxicity. By further bioassay-guided isolation, three compounds including asperflavin, neoechinulin A and preechinulin were successfully isolated from the BE of E...
October 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29101543/multi-cropping-edible-truffles-and-sweet-chestnuts-production-of-high-quality-castanea-sativa-seedlings-inoculated-with-tuber-aestivum-its-ecotype-t-uncinatum-t-brumale-and-t-macrosporum
#10
Amaya Álvarez-Lafuente, Luis F Benito-Matías, Juan L Peñuelas-Rubira, Laura M Suz
The plantation and management of sweet chestnut (Castanea sativa Mill.) orchards is a common and traditional land use system in many areas of Europe that offers the advantage of simultaneous production of nuts and timber. During the last decades, sweet chestnut has declined dramatically in many regions because of the profound social changes in rural areas coupled with pathogen attacks. Truffles, the hypogeous ascocarps of the ectomycorrhizal genus Tuber, are currently cultivated using host trees inoculated with these fungi for improving production in truffle orchards...
November 3, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/29100733/synthesis-antifungal-and-antitumor-activity-of-two-new-types-of-imidazolin-2-ones
#11
Shaopeng Wei, Li Li, Yaping Shu, Kun Zhao, Zhiqin Ji
Thirty-six imidazolin-2-ones, including ten pairs of benzimidazolones and sixteen imidazopyridines, were synthesized and subjected for the evaluation of antifungal and antitumor activity. Compounds 4a-01, 6-01, 6-04 and 6-06 could effectively inhibit the spore germination and mycelium growth of Botrytis cinerea. The relationship between structure and antifungal activity revealed that the introducing short-chain aliphatic acyl groups at the moiety of imidazopyridines is favorable for the antifungal activity, whereas aromatic acyl groups are much better than aliphatic acyl groups for the activity of benzimidazolones except for acetyl...
October 21, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29081887/pharmacological-basis-for-use-of-armillaria-mellea-polysaccharides-in-alzheimer-s-disease-antiapoptosis-and-antioxidation
#12
Shengshu An, Wenqian Lu, Yongfeng Zhang, Qingxia Yuan, Di Wang
Armillaria mellea, an edible fungus, exhibits various pharmacological activities, including antioxidant and antiapoptotic properties. However, the effects of A. mellea on Alzheimer's disease (AD) have not been systemically reported. The present study aimed to explore the protective effects of mycelium polysaccharides (AMPS) obtained from A. mellea, especially AMPSc via 70% ethanol precipitation in a L-glutamic acid- (L-Glu-) induced HT22 cell apoptosis model and an AlCl3 plus D-galactose- (D-gal-) induced AD mouse model...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29076072/characterization-of-siderophore-produced-by-pseudomonas-syringae-baf-1-and-its-inhibitory-effects-on-spore-germination-and-mycelium-morphology-of-fusarium-oxysporum
#13
Sumei Yu, Chunying Teng, Jinsong Liang, Tao Song, Liying Dong, Xin Bai, Yu Jin, Juanjuan Qu
In this study, an antagonistic bacterium against Fusarium oxysporum was identified and designated as Pseudomonas syringae strain BAF.1 on the basis of 16S rDNA sequence analysis and physiological-biochemical characteristics. It produced catechol-species siderophore at a molecular weight of 488.59 Da and a maximum amount of 55.27 μg/ml with glucose as a carbon source and asparagine as a nitrogen source at a C/N ratio of 10:1, 30°C and pH 7. The siderophore exhibited prominent antagonistic activity against Fusarium oxysporum with a maximum inhibition rate of 95...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29066302/de-novo-transcriptomic-analysis-during-lentinula-edodes-fruiting-body-growth
#14
Yingzhu Wang, Xianlu Zeng, Wenguang Liu
The fruiting body of Lentinula edodes is a popular edible mushroom, and extracts from the mycelium and the fruiting body of this species have diverse therapeutic potential. To gain insights into the molecular mechanisms underlying the fruiting body growth of L. edodes from the early bud stage (EBS), through the intermediate developing stage (IDS), to the fully developed stage (FDS), we performed de novo transcriptomic analysis using high-throughput Illumina RNA-sequencing. First, we generated three cDNA libraries representative of the three respective stages...
October 21, 2017: Gene
https://www.readbyqxmd.com/read/29062957/reactive-oxygen-species-and-antioxidant-properties-from-mushrooms
#15
REVIEW
Carmen Sánchez
Preventive medicine and food industry have shown an increased interest in the development of natural antioxidants, since those most commonly used synthetic antioxidants may have restricted use in food. This could explain why there is currently much research on the antioxidant properties from natural products such as mushrooms. Many mushrooms have been reported to possess antioxidant properties, which enable them to neutralize free radicals. The oxygen molecule is a free radical, which lead to the generation of the reactive oxygen species and can damage the cells...
March 2017: Synthetic and Systems Biotechnology
https://www.readbyqxmd.com/read/29044849/carvacrol-and-eugenol-effectively-inhibit-rhizopus-stolonifer-and-control-postharvest-soft-rot-decay-in-peaches
#16
Dandan Zhou, Zhuo Wang, Mengyu Li, Mengke Xing, Tingting Xian, Kang Tu
AIMS: This study aimed to investigate the antifungal mechanism of carvacrol and eugenol to inhibit Rhizopus stolonifer and the control of postharvest soft rot decay in peaches. METHODS AND RESULTS: For antifungal mechanism, effects of carvacrol and eugenol on the mycelium growth, leakages of cytoplasmic contents, mycelium morphology, cell membrane, and membrane composition of R. stolonifer was investigated. Carvacrol and eugenol both exhibited dose-depended antifungal activity against R...
October 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29043953/nonomuraea-glycinis-sp-nov-a-novel-actinomycete-isolated-from-the-root-of-black-soya-bean-glycine-max-l-merr
#17
Zhilei Li, Wei Song, Junwei Zhao, Xiaoxin Zhuang, Yue Zhao, Xiangjing Wang, Wensheng Xiang
A novel actinomycete, designated strain NEAU-BB2C19(T), was isolated from the root of black soya bean [Glycine max (L.) Merr] collected from Harbin, Heilongjiang Province, China, and characterized using a polyphasic approach. The strain was an aerobic, Gram-stain-positive actinomycete that formed extensively branched substrate mycelium and aerial hyphae. The predominant menaquinones were MK-9(H2) and MK-9(H0). The major cellular fatty acid profile consisted of iso-C16 : 0, 10-methyl C17 : 0 and 10-methyl C18 : 0...
October 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29039036/performance-evaluation-of-two-aspergillus-spp-for-the-decolourization-of-reactive-dyes-by-bioaccumulation-and-biosorption
#18
Megha Mathur, Deepak Gola, Rupobrata Panja, Anushree Malik, Shaikh Ziauddin Ahammad
A biological method was adopted to decolourize textile dyes, which is an economic and eco-friendly technology for textile wastewater remediation. Two fungal strains, i.e. Aspergillus lentulus and Aspergillus fumigatus, were used to study the removal of low to high concentrations (25 to 2000 mg L(-1)) of reactive remazol red, reactive blue and reactive yellow dyes by biosorption and bioaccumulation. The biosorption was successful only at the lower concentrations. A. lentulus was capable of removing 67-85% of reactive dyes during bioaccumulation mode of treatment at 500 mg L(-1) dye concentration with an increased biomass uptake capacity...
October 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29034858/streptomyces-kalpinensis-sp-nov-an-actinomycete-isolated-from-a-salt-water-beach
#19
Guo-Quan Ma, Zhan-Feng Xia, Chuan-Xing Wan, Yao Zhang, Xiao-Xia Luo, Li-Li Zhang
A novel actinobacterium designated TRM 46509(T) was isolated from a salt water beach at Kalpin, Xinjiang, north-west China. The strain was aerobic and Gram-stain-positive, with an optimum NaCl concentration for growth of 1 % (w/v). The isolate formed sparse aerial mycelium and produced spiral spores at the end of the aerial mycelium on Gauze's No. 1 medium. The isolate contained ll-diaminopimelic acid as the diagnostic diamino acid and ribose as the major whole-cell sugar. The polar lipids included diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, phosphatidylinositol, phosphatidylinositol mannosides and an unidentified phospholipid...
October 16, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29027076/assessing-the-stability-in-dry-mycelial-fertilizer-of-penicillium-chrysogenum-as-soil-amendment-via-fluorescence-excitation-emission-matrix-spectra-organic-matter-s-transformation-and-maturity
#20
Bing Wang, Chen Cai, Guomin Li, Huiling Liu
Utilization as dry mycelial fertilizer (DMF) produced from penicillin fermentation fungi mycelium (PFFM) with an acid-heating pretreatment is a potential way. To study the transformation and stability of water-extractable organic matter in DMF-amended soil via fluorescence regional integration (FRI) of fluorescence excitation-emission matrix (EEM), a soil experiment in pot was carried out. The results showed that residual penicillin (about 32 mg/kg) was almost degraded in the first 5 days, indicating that the drug pollution was in control...
October 9, 2017: Environmental Science and Pollution Research International
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