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Colletotrichum

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https://www.readbyqxmd.com/read/28805453/colletotrichine-a-a-new-sesquiterpenoid-from-colletotrichum-gloeosporioides-gt-7-a-fungal-endophyte-of-uncaria-rhynchophylla
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
https://www.readbyqxmd.com/read/28698913/antibacterial-and-antioxidant-constituents-of-extracts-of-endophytic-fungi-isolated-from-ocimum-basilicum-var-thyrsiflora-leaves
#11
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/28679727/exposure-to-the-leaf-litter-microbiome-of-healthy-adults-protects-seedlings-from-pathogen-damage
#12
Natalie Christian, Edward Allen Herre, Luis C Mejia, Keith Clay
It is increasingly recognized that microbiota affect host health and physiology. However, it is unclear what factors shape microbiome community assembly in nature, and how microbiome assembly can be manipulated to improve host health. All plant leaves host foliar endophytic fungi, which make up a diverse, environmentally acquired fungal microbiota. Here, we experimentally manipulated assembly of the cacao tree (Theobroma cacao) fungal microbiome in nature and tested the effect of assembly outcome on host health...
July 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28674526/induction-of-cryptic-and-bioactive-metabolites-through-natural-dietary-components-in-an-endophytic-fungus-colletotrichum-gloeosporioides-penz-sacc
#13
Vijay K Sharma, Jitendra Kumar, Dheeraj K Singh, Ashish Mishra, Satish K Verma, Surendra K Gond, Anuj Kumar, Namrata Singh, Ravindra N Kharwar
Grape skin and turmeric extracts having the major components resveratrol and curcumin, respectively, were used for the induction of cryptic and bioactive metabolites in an endophytic fungus Colletotrichum gloeosporioides isolated from Syzygium cumini. The increase in total amount of crude compounds in grape skin and turmeric extract treated cultures was 272.48 and 174.32%, respectively, compared to the untreated control. Among six human pathogenic bacteria tested, the maximum inhibitory activity was found against Aeromonas hydrophila IMS/GN11 while no inhibitory activity was observed against Enterococcus faecalis IMS/GN7...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28671253/identification-of-colletotrichum-isolates-from-capsicum-chinense-in-amazon
#14
C V S de Oliveira, K S Matos, D M C de Albuquerque, R E Hanada, G F da Silva
Chili pepper (Capsicum chinense) is a great economic important culture on the State of Amazonas, and it represents, approximately, a production of 1.9 thousand tons per year. It is one of the hosts of Colletotrichum genus in the North region of Brazil. The aim of the study was to differentiate and to identify isolates of Colletotrichum collected from C. chinense in Amazon. Molecular characterization, using RFLP-PCR, ERIC-PCR and ISSR, was carried out initially for screening of morphologically similar isolates...
June 29, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28663602/genera-of-phytopathogenic-fungi-gophy-1
#15
Y Marin-Felix, J Z Groenewald, L Cai, Q Chen, S Marincowitz, I Barnes, K Bensch, U Braun, E Camporesi, U Damm, Z W de Beer, A Dissanayake, J Edwards, A Giraldo, M Hernández-Restrepo, K D Hyde, R S Jayawardena, L Lombard, J Luangsa-Ard, A R McTaggart, A Y Rossman, M Sandoval-Denis, M Shen, R G Shivas, Y P Tan, E J van der Linde, M J Wingfield, A R Wood, J Q Zhang, Y Zhang, P W Crous
Genera of Phytopathogenic Fungi (GOPHY) is introduced as a new series of publications in order to provide a stable platform for the taxonomy of phytopathogenic fungi. This first paper focuses on 21 genera of phytopathogenic fungi: Bipolaris, Boeremia, Calonectria, Ceratocystis, Cladosporium, Colletotrichum, Coniella, Curvularia, Monilinia, Neofabraea, Neofusicoccum, Pilidium, Pleiochaeta, Plenodomus, Protostegia, Pseudopyricularia, Puccinia, Saccharata, Thyrostroma, Venturia and Wilsonomyces. For each genus, a morphological description and information about its pathology, distribution, hosts and disease symptoms are provided...
March 2017: Studies in Mycology
https://www.readbyqxmd.com/read/28662462/alterations-of-growth-antioxidant-system-and-gene-expression-in-stylosanthes-guianensis-during-colletotrichum-gloeosporioides-infection
#16
Hui Wang, Zhijian Chen, Guodao Liu, Changjun Bai, Hong Qiu, Yanxing Jia, Lijuan Luo
Anthracnose caused by Colletotrichum gloeosporioides is one of the most destructive fungal diseases of many plants, including stylo (Stylosanthes spp.), which is an important tropical forage legume. Although C. gloeosporioides-caused anthracnose is the major constraint limiting the growth and yield of stylo, little information is available regarding the responses of stylo during the infection process of this pathogen. This study investigated the changes in growth, the antioxidant system and gene expression in stylo in response to C...
June 20, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28658312/red-rot-resistant-transgenic-sugarcane-developed-through-expression-of-%C3%AE-1-3-glucanase-gene
#17
Shivani Nayyar, Bipen Kumar Sharma, Ajinder Kaur, Anu Kalia, Gulzar Singh Sanghera, Karanjit Singh Thind, Inderjit Singh Yadav, Jagdeep Singh Sandhu
Sugarcane (Saccharum spp.) is a commercially important crop, vulnerable to fungal disease red rot caused by Colletotrichum falcatum Went. The pathogen attacks sucrose accumulating parenchyma cells of cane stalk leading to severe losses in cane yield and sugar recovery. We report development of red rot resistant transgenic sugarcane through expression of β-1,3-glucanase gene from Trichoderma spp. The transgene integration and its expression were confirmed by quantitative reverse transcription-PCR in first clonal generation raised from T0 plants revealing up to 4...
2017: PloS One
https://www.readbyqxmd.com/read/28645773/abc-protein-cgabcf2-is-required-for-asexual-and-sexual-development-appressorial-formation-and-plant-infection-in-colletotrichum-gloeosporioides
#18
Zongshan Zhou, Jianyuan Wu, Meiyu Wang, Junxiang Zhang
ATP-binding cassette (ABC) proteins are exclusively found in both prokaryotes and eukaryotes. In this study, we have characterized a gene from Glomerella leaf spot pathogen Colletotrichum gloeosporioides that encodes an ABC protein, whose function to date remains unknown. We designated this gene as CgABCF2. Deletion of CgABCF2 showed drastic reduction both growing rate and conidial production in C. gloeosporioides. The Δcgabcf2 mutant did not form the appressoria, lost the capability to infect apple and failed to form lesions on the wounded leaves and fruits...
June 20, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28642771/transcriptomic-analysis-of-avocado-hass-persea-americana-mill-in-the-interaction-system-fruit-chitosan-colletotrichum
#19
Luis-Ángel Xoca-Orozco, Esther Angélica Cuellar-Torres, Sandra González-Morales, Porfirio Gutiérrez-Martínez, Ulises López-García, Luis Herrera-Estrella, Julio Vega-Arreguín, Alejandra Chacón-López
Avocado (Persea americana) is one of the most important crops in Mexico as it is the main producer, consumer, and exporter of avocado fruit in the world. However, successful avocado commercialization is often reduced by large postharvest losses due to Colletotrichum sp., the causal agent of anthracnose. Chitosan is known to have a direct antifungal effect and acts also as an elicitor capable of stimulating a defense response in plants. However, there is little information regarding the genes that are either activated or repressed in fruits treated with chitosan...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28607439/qtl-mapping-reveals-genetic-determinants-of-fungal-disease-resistance-in-the-wild-lentil-species-lens-ervoides
#20
Vijai Bhadauria, Larissa Ramsay, Kirstin E Bett, Sabine Banniza
Lens ervoides, a wild relative of lentil is an important source of allelic diversity for enhancing the genetic resistance of the cultivated species against economically important fungal diseases, such as anthracnose and Stemphylium blight caused by Colletotrichum lentis and Stemphylium botryosum, respectively. To unravel the genetic control underlying resistance to these fungal diseases, a recombinant inbred line (RIL) population (n = 94, F9) originating from a cross between two L. ervoides accessions, L01-827A and IG 72815, was genotyped on the Illumina HiSeq 2500 platform...
June 12, 2017: Scientific Reports
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