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Amrita Saxena, Richa Raghuwanshi, Vijai Kumar Gupta, Harikesh B Singh
Indian cuisine is renowned and celebrated throughout the world for its spicy treat to the tongue. The flavor and aroma of the food generated due to the use of spices creates an indelible experience. Among the commonly utilized spices to stimulate the taste buds in Indian food, whole or powdered chilli constitutes an inevitable position. Besides being a vital ingredient of of Indian food, chilli occupy an important position as an economic commodity, a major share in Indian economy. Chilli also has uncountable benefits to human health...
2016: Frontiers in Microbiology
Edyta Łukowska-Chojnacka, Jolanta Mierzejewska, Małgorzata Milner-Krawczyk, Małgorzata Bondaryk, Monika Staniszewska
With the appearance of the antifungal resistance, novel antifungal agents need to be identified. In this context new 2,5-disubstituted tetrazole derivatives containing benzothiazole, benzoxazole or phenylsulfonyl moiety were synthesized by N-alkylation of aryltetrazole with 2-[(3-chloropropyl)sulfanyl]-1,3-benzothiazole or 2-[(3-chloropropyl)sulfanyl]-1,3-benzoxazole and Michael-type addition of aryltetrazole to phenyl vinyl sulfone. The chemical structures of the synthesized compounds were confirmed by means of (1)H NMR, (13)C NMR, IR and HRMS spectral data...
September 28, 2016: Bioorganic & Medicinal Chemistry
Xiangbin Xu, Huanhuan Lei, Xiuyan Ma, Tongfei Lai, Hongmiao Song, Xuequn Shi, Jiangkuo Li
Anthracnose caused by Colletotrichum gloeosporioides is one of the most important postharvest diseases in mango fruit, often causing huge economic losses. In this study, the effect of 1-methylcyclopropene (1-MCP) against anthracnose in postharvest mango fruit and the mechanisms involved were investigated. 1-MCP induced reactive oxygen species (ROS) generation, damaged the mitochondria and destroyed the integrity of plasma membrane of spores of C. gloeosporioides, significantly suppressing spore germination and mycelial growth of C...
October 6, 2016: International Journal of Food Microbiology
Wonsu Cheon, Young Soo Kim, Kotnala Balaraju, Bong-Su Kim, Byeong-Ho Lee, Yongho Jeon
To study the control of postharvest decay caused by Colletotrichum gloeosporioides and Penicillium expansum, gamma irradiation alone or in combination with fumigation was evaluated to extend the shelf life of apples in South Korea. An irradiation dose of 2.0 kGy resulted in the maximum inhibition of C. gloeosporioides and P. expansum spore germination. The gamma irradiation dose required to reduce the spore germination by 90% was 0.22 and 0.35 kGy for C. gloeosporioides and P. expansum, respectively. Microscopic observations revealed that when the fungal spores were treated with gamma irradiation (4...
October 2016: Plant Pathology Journal
M A C Oliveira, J B Duarte, C L Morello, N D Suassuna, A B Oliveira
Ramulosis is one of the most aggressive diseases in cotton, and understanding the genetic control of its resistance is imperative for selecting superior cotton genotypes in breeding programs. This study analyzed the inheritance pattern of this resistance using chi-square goodness-of-fit tests to determine the phenotypic proportions of the F2 generation, and a mixed inheritance approach to jointly model major gene and polygenes effects. F1, F2, Rc1, and Rc2 generations were obtained by crossing resistant (BRS Facual, CNPA 2984, or CNPA 2043) and susceptible (Delta Opal, CNPA 999, or CNPA 2161) genotypes, and were assessed under field conditions with artificial inoculation of the pathogen (Colletotrichum gossypii var...
September 2, 2016: Genetics and Molecular Research: GMR
He Liu, Qiang Lin, Yixian Xie, Huoming Shu, Bo Li, Ge Gao, Kai Xiao, Xiaojun Yao, Runcong Dong, Yanlin Liu, Mengxiong He, Luyong Wu, Zhenfan Sun, Wenying He
1-(4-Bromophenyl)-5-phenyl-1H-1,2,3-triazole (BPT) was a newly synthesized compound. The acute toxicities of BPT to mice by intragastric administration have been determined and the result indicates that the intragastric administration of BPT did not produce any significant toxic effect on Kunming strain mice. It is also evaluated for the antimicrobial activity of BPT against three kinds of plant mycoplasma, Fusarium Wilt (race 4), Colletotrichum gloeosporioides Penz. and Xanthomonas oryzae by different method in vitro...
September 24, 2016: Journal of Photochemistry and Photobiology. B, Biology
Jie Zhong, Xi Dan Pang, Hong Jian Zhu, Bi Da Gao, Wen Kun Huang, Qian Zhou
A novel double-stranded RNA (dsRNA) mycovirus, consisting of three dsRNA genome segments and possibly belonging to the family Chrysoviridae, was isolated from the filamentous phytopathogenic fungus Colletotrichum gloeosporioides and designated as Colletotrichum gloeosprioides chrysovirus 1 (CgCV1). The three dsRNAs of the CgCV1 genome with lengths of 3397, 2869, and 2630 bp (dsRNAs1-3) were found to contain a single open reading frame (ORF) putatively encoding the RNA-dependent RNA polymerase (RdRp), a capsid protein, and a protease, respectively, all of which exhibited some degree of sequence similarity to the comparable putative proteins encoded by the genus Chrysovirus...
2016: Viruses
Antonino Malacrinò, Leonardo Schena, Orlando Campolo, Francesca Laudani, Saveria Mosca, Giulia Giunti, Cinzia Patricia Strano, Vincenzo Palmeri
The occurrence of interaction between insects and fungi is interesting from an ecological point of view, particularly when these interactions involve insect pests and plant pathogens within an agroecosystem. In this study, we aimed to perform an accurate analysis on the fungal microbiota associated to Bactrocera oleae (Rossi) through a metabarcoding approach based on 454 pyrosequencing. From this analysis, we retrieved 43,549 reads that clustered into 128 operational taxonomic units (OTUs), of which 29 resulted in the "core" associate fungi of B...
September 29, 2016: Microbial Ecology
Xin Xu, Yonglin Wang, Chengming Tian, Yingmei Liang
Rho GTPases regulate morphology and multiple cellular functions such as asexual development, polarity establishment, and differentiation in fungi. To determine the roles of CgRhoB, a Rho GTPase protein, here we characterized CgRhoB in the poplar anthracnose fungus Colletotrichum gloeosporioides. First of all, we determined that conidial germination was inhibited and intracellular cyclic AMP (cAMP) level was increased in the CgRhoB deletion mutants. Loss of CgRhoB resulted in shorter germ tubes and enhanced appressoria formation after germination on the hydrophobic surface...
September 23, 2016: Fungal Genetics and Biology: FG & B
Aline Cristina Velho, Mathias F Rockenbach, Pedro Mondino, Marciel J Stadnik
Apple bitter rot (ABR) and Glomerella leaf spot (GLS) can be caused by Colletotrichum fructicola. Although both diseases can occur simultaneously in orchards, some isolates show clear organ specialization. Thus, this work was aimed to compare microscopically the development of preinfective structures of ABR- and GLS isolates and their impact on the enzymatic oxidant defense system during the leaf infection process. On leaves, conidial germlings of GLS-isolate formed appressoria mostly sessile. In contrast, those of ABR-isolate were pedicellate and formed multiple melanized appressoria probably as a sign of unsuccessful infection attempts...
October 2016: Fungal Biology
Rinat Tardi-Ovadia, Raphael Linker, Leah Tsror
Fungi can modify the pH in and/or around the infected site via alkalinization or acidification and pH monitoring may provide valuable information on host-fungus interactions. The objective of the present study was to examine the ability of two fungi, Colletotrichum coccodes and Helminthosporium solani, to modify the pH of potato tuber during artificial inoculation in situ. Both fungi cause blemishes on potato tubers which downgrade tuber quality and yield. Direct visualization and estimation of pH change near the inoculation area were achieved using pH indicators and image analysis...
September 19, 2016: Phytopathology
Yongjun Fang, Hailiang Mei, Binhui Zhou, Xiaohu Xiao, Meng Yang, Yacheng Huang, Xiangyu Long, Songnian Hu, Chaorong Tang
Along with changes in morphology in the course of maturation, leaves of Hevea brasiliensis become more resistant to leaf diseases, including the South American Leaf Blight (SALB), a devastating fungal disease of this economically important tree species. To understand the underlying mechanisms of this defense, and to identify the candidate genes involved, we sequenced the Hevea leaf transcriptome at four developmental stages (I to IV) by Illumina sequencing. A total of 62.6 million high-quality reads were generated, and assembled into 98,796 unique transcripts...
2016: Scientific Reports
P W Crous, M J Wingfield, D M Richardson, J J Le Roux, D Strasberg, J Edwards, F Roets, V Hubka, P W J Taylor, M Heykoop, M P Martín, G Moreno, D A Sutton, N P Wiederhold, C W Barnes, J R Carlavilla, J Gené, A Giraldo, V Guarnaccia, J Guarro, M Hernández-Restrepo, M Kolařík, J L Manjón, I G Pascoe, E S Popov, M Sandoval-Denis, J H C Woudenberg, K Acharya, A V Alexandrova, P Alvarado, R N Barbosa, I G Baseia, R A Blanchette, T Boekhout, T I Burgess, J F Cano-Lira, A Čmoková, R A Dimitrov, M Yu Dyakov, M Dueñas, A K Dutta, F Esteve-Raventós, A G Fedosova, J Fournier, P Gamboa, D E Gouliamova, T Grebenc, M Groenewald, B Hanse, G E St J Hardy, B W Held, Ž Jurjević, T Kaewgrajang, K P D Latha, L Lombard, J J Luangsa-Ard, P Lysková, N Mallátová, P Manimohan, A N Miller, M Mirabolfathy, O V Morozova, M Obodai, N T Oliveira, M E Ordóñez, E C Otto, S Paloi, S W Peterson, C Phosri, J Roux, W A Salazar, A Sánchez, G A Sarria, H-D Shin, B D B Silva, G A Silva, M Th Smith, C M Souza-Motta, A M Stchigel, M M Stoilova-Disheva, M A Sulzbacher, M T Telleria, C Toapanta, J M Traba, N Valenzuela-Lopez, R Watling, J Z Groenewald
Novel species of fungi described in the present study include the following from Australia: Vermiculariopsiella eucalypti, Mulderomyces natalis (incl. Mulderomyces gen. nov.), Fusicladium paraamoenum, Neotrimmatostroma paraexcentricum, and Pseudophloeospora eucalyptorum on leaves of Eucalyptus spp., Anungitea grevilleae (on leaves of Grevillea sp.), Pyrenochaeta acaciae (on leaves of Acacia sp.), and Brunneocarpos banksiae (incl. Brunneocarpos gen. nov.) on cones of Banksia attenuata. Novel foliicolous taxa from South Africa include Neosulcatispora strelitziae (on Strelitzia nicolai), Colletotrichum ledebouriae (on Ledebouria floridunda), Cylindrosympodioides brabejum (incl...
June 2016: Persoonia
Fangling Liu, Guiting Tang, Xiaojuan Zheng, Ying Li, Xiaofang Sun, Xiaobo Qi, You Zhou, Jing Xu, Huabao Chen, Xiaoli Chang, Sirong Zhang, Guoshu Gong
The anthracnose caused by Colletotrichum species is an important disease that primarily causes fruit rot in pepper. Eighty-eight strains representing seven species of Colletotrichum were obtained from rotten pepper fruits in Sichuan Province, China, and characterized according to morphology and the glyceraldehyde-3-phosphate dehydrogenase (GAPDH) sequence. Fifty-two strains were chosen for identification by phylogenetic analyses of multi-locus sequences, including the nuclear ribosomal internal transcribed spacer (ITS) region and the β-tubulin (TUB2), actin (ACT), calmodulin (CAL) and GAPDH genes...
2016: Scientific Reports
Jin Zhang, Ju-Fang Peng, Yu-Bin Bai, Ping Wang, Tao Wang, Jin-Ming Gao, Zun-Ting Zhang
5,6-Diarylpyrazolo[1,5-a]pyrimidines (3) and 6,7-diarylpyrazolo[1,5-a]pyrimidines (4) were chemoselectively synthesized by the condensation of isoflavone (1) and 3-aminopyrazole (2). 5,6-Diarylpyrazolo[1,5-a]pyrimidines (3) were obtained via microwave irradiation, and 6,7-diarylpyrazolo[1,5-a]pyrimidines (4) were obtained via conventional heating. In addition, the pyrimidine derivatives 3 and 4 were evaluated against five phytopathogenic fungi (Cytospora sp., Colletotrichum gloeosporioides, Botrytis cinerea, Alternaria solani, and Fusarium solani) using the mycelium growth rate method...
November 2016: Molecular Diversity
Jianyuan Wu, Zhirui Ji, Na Wang, Fumei Chi, Chengnan Xu, Zongshan Zhou, Junxiang Zhang
The Colletotrichum gloeosporioides is one of the most significant pathogens leading to huge economic losses. To infect plants and cause disease dissemination, the fungus elaborates to produce asexual spores called conidia, which are long-lived and highly resistant to environmental stresses. Here, we report a large-scale, systematic genome-wide screening of conidiogenesis-associated genes via conidiation assays, and high-efficiency TAIL-PCRs. Of 10,210 independent transformants tested, 59 mutants exhibited significant variation in conidial production...
December 2016: Current Microbiology
Ming-Zhi Zhang, Rong-Rong Zhang, Jia-Qun Wang, Xiang Yu, Ya-Ling Zhang, Qing-Qing Wang, Wei-Hua Zhang
Based on the microwave-assisted synthetic protocol developed in our previous work, we have synthesized a series of novel furo[3,2-c]coumarins as fused Osthole derivatives, via the reaction of 4-hydroxycoumarins and β-ketoesters catalyzed by DMAP. All the target compounds were evaluated in vitro for their antifungal activity against six phytopathogenic fungi, some compounds exhibited potential activity in the primary assays. Especially compounds 6c, 7b, 8b and 8c (shown in Fig. 1) were the most active ones, EC50 values of these four compounds against Colletotrichum capsica, Botrytis cinerea and Rhizoctonia solani were further investigated...
August 9, 2016: European Journal of Medicinal Chemistry
Mark A Jackson, Angela R Payne
Fungal microsclerotia ("small" sclerotia) are compact hyphal aggregates, typically 50-600 μm in diameter, that are formed under unfavorable nutritional and/or environmental conditions. These structures are often melanized and desiccated to some degree containing endogenous nutritional reserves for use when favorable conditions return. Many fungi, mostly plant pathogens, produce microsclerotia as a survival structure. Liquid culture methods have been developed for producing microsclerotia of the Ascomycota Metarhizium spp, Colletotrichum truncatum, Mycoleptodiscus terrestris, and Trichoderma spp...
2016: Methods in Molecular Biology
Qinfeng Yuan, Meijuan Chen, Yaqin Yan, Qiongnan Gu, Junbin Huang, Lu Zheng
Colletotrichum higginsianum is an important hemibiotrophic phytopathogen that causes crucifer anthracnose in various regions of the world. In many plant-pathogenic fungi, the Ste11-Ste7-Fus3/Kss1 kinase pathway is essential to pathogenicity and various plant infection processes. To date, the role of ChSte7 in C. higginsianum encoding a MEK orthologue of Ste7 in Saccharomyces cerevisiae has not been elucidated. In this report, we investigated the function of ChSte7 in the pathogen. The ChSte7 is predicted to encode a 522-amino-acid protein with a S_TKc conserved domain that shares 44% identity with Ste7 in S...
2016: BioMed Research International
Daniel Buchvaldt Amby, Tom Manczak, Mikael Agerlin Petersen, Thomas Sundelin, Corinna Weitzel, Maciej Grajewski, Henrik Toft Simonsen, Birgit Jensen
Colletotrichum acutatum is a major fungal pathogen of fruit crops, which causes severe yield losses in strawberry productions. A potential key factor in plant-pathogen interactions is fungal sesquiterpenoids that have myco- and phytotoxic activities. The first committed step in sesquiterpenoids biosynthesised is performed by sesquiterpene synthases (TPS). Only a few TPS's have been functionally characterized from filamentous fungi and none from the Colletotrichum genus. Despite it as an important fungal pathogen to agriculture, it is poorly understood at the molecular and chemical level...
August 22, 2016: Microbiology
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