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Colletotrichum

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https://www.readbyqxmd.com/read/28925289/a-new-antifungal-benzoic-acid-ester-from-uvaria-narum
#1
Alka Elizabeth Varghese, Balaji Govindan, Jyothilakshmi Madhavankutty, Antony Thomas Valiyaveetil, Madhusudhanan Karadka, Sabulal Baby
Uvaria narum has been used for gastrointestinal problems, jaundice, fever and skin diseases in traditional and ethnomedical practices. Our preliminary antifungal screening of various leaf extracts of U. narum revealed very good antifungal activity for its acetone extract. Active principle of U. narum leaf acetone extract was isolated by bioactivity-guided fractionation and characterised as a new molecule, 2-E-(2″-oxo-5″-acetoxy cyclopent-3″-en-1″-ylidene) ethyl benzoate, by NMR, IR and mass spectroscopic analyses...
September 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28923689/validation-of-standards-suitable-for-genome-size-estimation-of-fungi
#2
Pedro Talhinhas, Daniela Tavares, Ana Paula Ramos, Susana Gonçalves, João Loureiro
Genome size information is fundamental to genome sequencing and may also uncover genomic aspects of evolution. Flow Cytometry, the preferred method for genome size estimation, requires suitable standards. Here we validate Inonotus hispidus, Colletotrichum acutatum and Cenococcum geophilum (41, 68 and 203Mbp), as standards for fungal genome size estimation.
September 15, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28911735/antifungal-activity-of-sterols-and-dipsacus-saponins-isolated-from-dipsacus-asper-roots-against-phytopathogenic-fungi
#3
Nam Hee Choi, Ja Yeong Jang, Gyung Ja Choi, Yong Ho Choi, Kyoung Soo Jang, Van Thu Nguyen, Byung-Sun Min, Quang Le Dang, Jin-Cheol Kim
The in vivo antifungal activity of crude extracts of Dipsacus asper roots was evaluated against the phytopathogenic fungi Botrytis cinerea, Colletotrichum coccodes, Blumeria graminis f. sp. hordei, Magnaporthe grisea, Phytophthora infestans, Puccinia recondita and Rhizoctonia solani using a whole-plant assay method. Ethyl acetate and acetone extracts, at 1000μg/mL, suppressed the development of tomato gray mold (TGM) and tomato late blight (TLB) by 90%. Through bioassay-guided isolation, five antifungal substances were isolated from the D...
September 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/28889910/phylogenetic-study-of-the-colletotrichum-species-on-imported-citrus-fruits-uncovers-a-low-diversity-and-a-new-species-in-the-colletotrichum-gigasporum-complex
#4
Clovis Douanla-Meli, Jens-Georg Unger
Colletotrichum species associated with citrus fruits are fragmentarily known and it lacks accordingly accurate information on the diversity carried alongside the trade of these commodities from producer countries to Europe. In this study, we investigated the molecular phylogenetic diversity, colonisation, and prevalence of Colletotrichum isolated from asymptomatic and diseased tissues of nine citrus fruit species from 17 geographically diverse countries. Totally 454 isolates were morphoculturally characterised, and multilocus analyses (ACT, ApMat, CHS-1, GAPDH, ITS, TUB2) was performed on a subset of representative morphotype isolates...
October 2017: Fungal Biology
https://www.readbyqxmd.com/read/28858241/preparation-and-characterization-of-novel-cationic-chitosan-derivatives-bearing-quaternary-ammonium-and-phosphonium-salts-and-assessment-of-their-antifungal-properties
#5
Wenqiang Tan, Qing Li, Fang Dong, Qiuhong Chen, Zhanyong Guo
Chitosan is an abundant and renewable polysaccharide, its derivatives exhibit attractive bioactivities and the wide applications in various biomedical fields. In this paper, two novel cationic chitosan derivatives modified with quaternary phosphonium salts were successfully synthesized via trimethylation, chloride acetylation, and quaternization with tricyclohexylphosphine and triphenylphosphine. The structures and properties of synthesized products in the reactions were characterized by FTIR spectroscopy, ¹H-NMR, (31)P-NMR, elemental and thermogravimetric analysis...
August 31, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28851275/gapless-genome-assembly-of-colletotrichum-higginsianum-reveals-chromosome-structure-and-association-of-transposable-elements-with-secondary-metabolite-gene-clusters
#6
Jean-Félix Dallery, Nicolas Lapalu, Antonios Zampounis, Sandrine Pigné, Isabelle Luyten, Joëlle Amselem, Alexander H J Wittenberg, Shiguo Zhou, Marisa V de Queiroz, Guillaume P Robin, Annie Auger, Matthieu Hainaut, Bernard Henrissat, Ki-Tae Kim, Yong-Hwan Lee, Olivier Lespinet, David C Schwartz, Michael R Thon, Richard J O'Connell
BACKGROUND: The ascomycete fungus Colletotrichum higginsianum causes anthracnose disease of brassica crops and the model plant Arabidopsis thaliana. Previous versions of the genome sequence were highly fragmented, causing errors in the prediction of protein-coding genes and preventing the analysis of repetitive sequences and genome architecture. RESULTS: Here, we re-sequenced the genome using single-molecule real-time (SMRT) sequencing technology and, in combination with optical map data, this provided a gapless assembly of all twelve chromosomes except for the ribosomal DNA repeat cluster on chromosome 7...
August 29, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28846714/genome-sequencing-and-comparative-genomics-reveal-a-repertoire-of-putative-pathogenicity-genes-in-chilli-anthracnose-fungus-colletotrichum-truncatum
#7
Soumya Rao, Madhusudan R Nandineni
Colletotrichum truncatum, a major fungal phytopathogen, causes the anthracnose disease on an economically important spice crop chilli (Capsicum annuum), resulting in huge economic losses in tropical and sub-tropical countries. It follows a subcuticular intramural infection strategy on chilli with a short, asymptomatic, endophytic phase, which contrasts with the intracellular hemibiotrophic lifestyle adopted by most of the Colletotrichum species. However, little is known about the molecular determinants and the mechanism of pathogenicity in this fungus...
2017: PloS One
https://www.readbyqxmd.com/read/28839137/the-powdery-mildew-resistant-arabidopsis-mlo2-mlo6-mlo12-triple-mutant-displays-altered-infection-phenotypes-with-diverse-types-of-phytopathogens
#8
Johanna Acevedo-Garcia, Katrin Gruner, Anja Reinstädler, Ariane Kemen, Eric Kemen, Lingxue Cao, Frank L W Takken, Marco U Reitz, Patrick Schäfer, Richard J O'Connell, Stefan Kusch, Hannah Kuhn, Ralph Panstruga
Arabidopsis thaliana mlo2 mlo6 mlo12 triple mutant plants exhibit complete immunity against infection by otherwise virulent obligate biotrophic powdery mildew fungi such as Golovinomyces orontii. While this phenotype is well documented, the interaction profile of the triple mutant with other microbes is underexplored and incomplete. Here, we thoroughly assessed and quantified the infection phenotypes of two independent powdery mildew-resistant triple mutant lines with a range of microbes. These microorganisms belong to three kingdoms of life, engage in diverse trophic lifestyles, and deploy different infection strategies...
August 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28829899/correlation-study-of-resistance-components-in-the-selection-of-capsicum-genotypes-resistant-to-the-fungus-colletotrichum-gloeosporioides
#9
A C Maracahipes, J W S Correa, P E Teodoro, K L Araújo, M A A Barelli, L G Neves
Anthracnose is among the major diseases of the Capsicum culture. It is caused by different species of the genus Colletotrichum, which may result in major damages to the cultivation of this genus. Studies aiming to search for cultivars resistant to diseases are essential to reduce financial and agricultural losses. The objective of this study was to evaluate the correlation between the variables analyzed to select Capsicum genotypes resistant to the fungus Colletotrichum gloeosporioides. The experimental design was completely randomized blocks with three replications, 88 treatments, four ripe fruits, and four unripe fruits per replication...
August 17, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28825634/identification-and-antifungal-activity-of-compounds-from-the-mangrove-endophytic-fungus-aspergillus-clavatus-r7
#10
Wensheng Li, Ping Xiong, Wenxu Zheng, Xinwei Zhu, Zhigang She, Weijia Ding, Chunyuan Li
Two new coumarin derivatives, 4,4'-dimethoxy-5,5'-dimethyl-7,7'-oxydicoumarin (1), 7-(γ,γ-dimethylallyloxy)-5-methoxy-4-methylcoumarin (2), a new chromone derivative, (S)-5-hydroxy-2,6-dimethyl-4H-furo[3,4-g]benzopyran-4,8(6H)-dione (5), and a new sterone derivative, 24-hydroxylergosta-4,6,8(14),22-tetraen-3-one (6), along with two known bicoumarins, kotanin (3) and orlandin (4), were isolated from an endophytic fungus Aspergillusclavatus (collection No. R7), isolated from the root of Myoporum bontioides collected from Leizhou Peninsula, China...
August 19, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28805453/colletotrichine-a-a-new-sesquiterpenoid-from-colletotrichum-gloeosporioides-gt-7-a-fungal-endophyte-of-uncaria-rhynchophylla
#11
Xiao-Wei Chen, Zhong-Duo Yang, Jian-Hui Sun, Tong-Tong Song, Bao-Ying Zhu, Jun-Wen Zhao
One new compound, Colletotrichine A (1), was produced by the fungal Colletotrichum gloeosporioides GT-7. The structure was established by 1D and 2D NMR spectra. Monoamine oxidase (MAO) and acetylcholinesterase (AChE) inhibitory activity of 1 was also evaluated. Compound 1 showed AChE-inhibiting activity with IC50 value of 28 μg/mL.
August 14, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28791004/the-camp-pka-signaling-pathway-regulates-pathogenicity-hyphal-growth-appressorial-formation-conidiation-and-stress-tolerance-in-colletotrichum-higginsianum
#12
Wenjun Zhu, Man Zhou, Zeyang Xiong, Fang Peng, Wei Wei
Colletotrichum higginsianum is an economically important pathogen that causes anthracnose disease in a wide range of cruciferous crops. Understanding the mechanisms of the cruciferous plant-C. higginsianum interactions will be important in facilitating efficient control of anthracnose diseases. The cAMP-PKA signaling pathway plays important roles in diverse physiological processes of multiple pathogens. C. higginsianum contains two genes, ChPKA1 and ChPKA2, that encode the catalytic subunits of cyclic AMP (cAMP)-dependent protein kinase A (PKA)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28766401/evaluation-of-a-pomegranate-peel-extract-pge-as-alternative-mean-to-control-olive-anthracnose
#13
Sonia Pangallo, Maria Giulia Li Destri Nicosia, Giovanni Enrico Agosteo, Ahmed Abdelfattah, Flora Valeria Romeo, Santa O Cacciola, Paolo Rapisarda, Leonardo Schena
Olive anthracnose is caused by different species of Colletotrichum spp. and may be regarded as the most damaging disease of olive fruits worldwide, greatly affecting quality and quantity of the productions. A pomegranate peel extract (PGE) proved very effective in controlling the disease. The extract had a strong in vitro fungicidal activity against Colletotrichum acutatum sensu stricto, was very effective in both preventive and curative trials with artificially inoculated fruit, and induced resistance in treated olive tissues...
August 2, 2017: Phytopathology
https://www.readbyqxmd.com/read/28762287/disease-resistance-to-multiple-fungal-and-oomycete-pathogens-evaluated-using-a-recombinant-inbred-line-population-in-pepper
#14
Rachel P Naegele, Leah L Granke, Jessica Fry, Theresa Hill, Hamid Ashrafi, Allen Van Deynze, Mary K Hausbeck
Incorporating disease resistance into cultivars is a primary focus of modern breeding programs. Resistance to pathogens is often introgressed from landrace or wild individuals with poor fruit quality into commercial-quality cultivars. Sites of multiple disease resistance (MDR) are regions or "hotspots" of the genome with closely linked genes for resistance to different pathogens that could enable rapid incorporation of resistance. An F2-derived F6 recombinant inbred line population from a cross between 'Criollo de Morelos 334' and 'Early Jalapeno' was evaluated in inoculated fruit studies for susceptibility to oomycete and fungal pathogens: Phytophthora capsici, P...
August 1, 2017: Phytopathology
https://www.readbyqxmd.com/read/28761042/a-dsrna-virus-with-filamentous-viral-particles
#15
Hengxia Jia, Kaili Dong, Lingling Zhou, Guoping Wang, Ni Hong, Daohong Jiang, Wenxing Xu
Viruses with double-stranded RNA genomes form isometric particles or are capsidless. Here we report a double-stranded RNA virus, Colletotrichum camelliae filamentous virus 1 (CcFV-1) isolated from a fungal pathogen, that forms filamentous particles. CcFV-1 has eight genomic double-stranded RNAs, ranging from 990 to 2444 bp, encoding 10 putative open reading frames, of which open reading frame 1 encodes an RNA-dependent RNA polymerase and open reading frame 4 a capsid protein. When inoculated, the naked CcFV-1 double-stranded RNAs are infectious and induce the accumulation of the filamentous particles in vivo...
August 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/28745285/biosynthesised-silver-nanoparticles-using-aqueous-leaf-extract-of-tagetes-patula-l-and-evaluation-of-their-antifungal-activity-against-phytopathogenic-fungi
#16
Aradhana Sukhwal, Devendra Jain, Arunabh Joshi, Pokhar Rawal, Himmat S Kushwaha
In the recent decades, nanotechnology is gaining tremendous impetus due to its capability of modulating metals into their nanosize, which drastically changes the chemical, physical, biological and optical properties of metals. In this study, silver nanoparticles (AgNPs) synthesis using aqueous leaf extracts of Tagetes patula L. which act as reducing agent as well as capping agent is reported. Synthesis of AgNPs was observed at different parameters like temperature, concentration of silver nitrate, leaf extract concentration and time of reduction...
August 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28738309/irradiation-by-blue-light-in-the-presence-of-a-photoacid-confers-changes-to-colony-morphology-of-the-plant-pathogen-colletotrichum-gloeosporioides
#17
Ron Simkovitch, Oren Gajst, Einat Zelinger, Oded Yarden, Dan Huppert
We used the photoacid 8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS) that converts blue photons to acidic protons in water, with an efficiency of close to 100%, and determined that this treatment conferred changes to colony morphology of the plant pathogen Colletotrichum gloeosporioides. The time elapsed until hyphal collapse is noticed depends on both the laser intensity in mW/cm(2), and the concentration of HPTS in the Agar hydrogel. The time elapsed until hyphal collapse is noticed varies by only ±8% at HPTS concentrations of 500μM and at lower concentrations of HPTS the variance increases as the inverse of the concentration...
June 28, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28733027/isolation-and-characterization-of-metabolites-from-bacillus-licheniformis-mh48-with-antifungal-activity-against-plant-pathogens
#18
Min-Hae Jeong, Yong-Seong Lee, Jeong-Yong Cho, Young-Sang Ahn, Jae-Hak Moon, Hae-Nam Hyun, Gyu-Suk Cha, Kil-Yong Kim
In this study, we isolated Bacillus licheniformis MH48 from rhizosphere soil and demonstrated that this strain shows significant antifungal activity against Rhizoctonia solani, Colletotrichum gloeosporioides, and Phytophthora capsici. Our results showed that a 50% concentration of bacterial cell-free culture filtrate of B. licheniformis MH48 shows strong activity against fungal pathogens. Benzoic acid produced by B. licheniformis MH48 was purified by various chromatographic techniques and identified by nuclear magnetic resonance and gas chromatography-mass spectrometry analysis...
July 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28714347/antifungal-activities-and-active-ingredients-of-melodinus-suaveolens-champ-ex-benth
#19
Yanan Xu, Siquan Ling, Dongqiang Zeng, Wenwei Tang
Four Melodinus species with antifungal activity were found in survey of the floral resources, in Shiwan Mountain Natural Reserve, Guangxi Province, China. Crude methanolic extracts of the twigs and leaves of Melodinus suaveolens exhibited potent antifungal activities against the plant pathogenic fungi Colletotrichum musae, Colletotrichum graminicola, Colletotrichum gloeosporioides and Alternaria musae, and the ethyl acetate fraction inhibited these pathogens at rates of 85.37, 91.47, 72.77 and 89.87%, respectively (5 mg/mL)...
July 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28710636/biotransformation-of-dhea-into-7%C3%AE-15%C3%AE-dioh-dhea
#20
Hui Li, Jin Sun, Zhenghong Xu
3β,7α,15α-Trihydroxy-5-androsten-17-one (7α,15α-diOH-DHEA) is a key intermediate of the novel oral contraceptive "Yasmin" (widely used in birth control pills and postmenopausal hormone replacement therapy pills; the active ingredient is drospirenone). It can be synthesized from dehydroepiandrosterone (DHEA) by microbial dihydroxylation at the C7 and C15 positions. Here we describe the method of bioconversion from DHEA into 7α,15α-diOH-DHEA by Colletotrichum lini. Using 6 g/L DHEA as a substrate, the DHEA conversion and the 7α,15α-diOH-DHEA molar yield were 72...
2017: Methods in Molecular Biology
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