84 results match your criteria sigatoka disease

The Mitochondrial Genome of a Plant Fungal Pathogen (Mycosphaerellaceae), Comparative Analysis and Diversification Times of the Sigatoka Disease Complex Using Fossil Calibrated Phylogenies.

Life (Basel) 2021 Mar 9;11(3). Epub 2021 Mar 9.

Corporación para Investigaciones Biológicas, Comparative Biology Laboratory, Cra 72A Medellín, Antioquia, Colombia.

Mycosphaerellaceae is a highly diverse fungal family containing a variety of pathogens affecting many economically important crops. Mitochondria play a crucial role in fungal metabolism and in the study of fungal evolution. This study aims to: (i) describe the mitochondrial genome of , and (ii) compare it with closely related species (, , and ) available online, paying particular attention to the Sigatoka disease's complex causal agents. Read More

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A world-wide analysis of reduced sensitivity to DMI fungicides in the banana pathogen Pseudocercospora fijiensis.

Pest Manag Sci 2021 Mar 25. Epub 2021 Mar 25.

Wageningen Research, Wageningen University and Research, Wageningen, The Netherlands.

Background: Pseudocercospora fijiensis is the causal agent of the black leaf streak disease (BLSD) of banana. Bananas are important global export commodities and a major staple food. Their susceptibility to BLSD pushes disease management towards excessive fungicide use, largely relying on multisite inhibitors and sterol demethylation inhibitors (DMIs). Read More

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Early detection of black Sigatoka in banana leaves using hyperspectral images.

Appl Plant Sci 2020 Aug 28;8(8):e11383. Epub 2020 Aug 28.

Department of Statistics Salamanca University (USAL) Salamanca Spain.

Premise: Black Sigatoka is one of the most severe banana ( spp.) diseases worldwide, but no methods for the rapid early detection of this disease have been reported. This paper assesses the use of hyperspectral images for the development of a partial-least-squares penalized-logistic-regression (PLS-PLR) model and a hyperspectral biplot (HS biplot) as a visual tool for detecting the early stages of black Sigatoka disease. Read More

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Genetic Diversity and Mating Type Distribution of on Banana in Uganda and Tanzania.

Phytopathology 2021 Mar 8:PHYTO04200138R. Epub 2021 Mar 8.

International Institute of Tropical Agriculture, P.O. Box 7878, Kampala, Uganda.

Black Sigatoka, caused by , is a major foliar disease of banana and plantain worldwide. There are few available data regarding the genetic diversity and population structure of the pathogen in East Africa, which are needed to design effective and durable disease management strategies. We genotyped 319 single-spore isolates of . Read More

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First Draft Genome Sequence Resource of a Strain of Isolated in North America.

Phytopathology 2020 Oct 17;110(10):1620-1622. Epub 2020 Aug 17.

Instituto de Investigación Lightbourn, A. C., Ciudad Jiménez, Chihuahua, México.

Black Sigatoka disease, caused by the fungus , is one of the most devastating diseases of banana around the world. Fungicide applications are the primary tool used to manage black Sigatoka, but fungicide resistance in , as in other fungal pathogens, is one of the major limitations in the efficient management and prevention of this disease. In the current study, we present the draft genome of strain IIL-20, the first genomic sequence published from a strain of this fungus isolated in North America. Read More

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October 2020

Genetic Diversity and Azole Fungicide Sensitivity in Field Populations in Brazil.

Front Microbiol 2020 4;11:99. Epub 2020 Feb 4.

Department of Phytopathology, University of Brasília, Brasília, Brazil.

, causal agent of Sigatoka leaf spot, or yellow Sigatoka disease, is considered a major pathogen of banana ( spp.). Widely disseminated in Brazil, this study explored the genetic diversity in field populations of the pathogen from production areas in the Distrito Federal and the States of Bahia, Minas Gerais, and Rio Grande do Norte. Read More

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February 2020

Distribution of species causing Sigatoka leaf diseases of banana in Uganda and Tanzania.

Plant Pathol 2020 Jan 3;69(1):50-59. Epub 2019 Nov 3.

International Institute of Tropical Agriculture PO Box 7878 Kampala Uganda.

Sigatoka leaf diseases are a major constraint to banana production. A survey was conducted in Tanzania and Uganda to assess the distribution of species and severity of Sigatoka leaf diseases. species were identified using species-specific primers. Read More

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January 2020

Pfcyp51 exclusively determines reduced sensitivity to 14α-demethylase inhibitor fungicides in the banana black Sigatoka pathogen Pseudocercospora fijiensis.

PLoS One 2019 17;14(10):e0223858. Epub 2019 Oct 17.

Laboratory of Phytopathology, Wageningen University and Research, The Netherlands, Wageningen, the Netherlands.

The haploid fungus Pseudocercospora fijiensis causes black Sigatoka in banana and is chiefly controlled by extensive fungicide applications, threatening occupational health and the environment. The 14α-Demethylase Inhibitors (DMIs) are important disease control fungicides, but they lose sensitivity in a rather gradual fashion, suggesting an underlying polygenic genetic mechanism. In spite of this, evidence found thus far suggests that P. Read More

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Stable reference genes for RT-qPCR analysis of gene expression in the Musa acuminata-Pseudocercospora musae interaction.

Sci Rep 2019 10 10;9(1):14592. Epub 2019 Oct 10.

Instituto de Ciências Biológicas, Departamento de Biologia Celular, Universidade de Brasília, Campus Universitário Darcy Ribeiro, 70910-900, Brasília, DF, Brazil.

Leaf pathogens are limiting factors in banana (Musa spp.) production, with Pseudocercospora spp. responsible for the important Sigatoka disease complex. Read More

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October 2019

Black Sigatoka in bananas: Ecoclimatic suitability and disease pressure assessments.

PLoS One 2019 14;14(8):e0220601. Epub 2019 Aug 14.

HarvestChoice, InSTePP, University of Minnesota, St. Paul, MN, United States of America.

Black leaf streak disease, or black Sigatoka, is caused by the fungus Pseudocercospora fijiensis, and has been identified as a major constraint to global production of banana and plantain. We fitted a climatic niche model (CLIMEX) for P. fijiensis to gain an understanding of the patterns of climate suitability, and hence hazard from this disease. Read More

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A polyketide synthase gene cluster associated with the sexual reproductive cycle of the banana pathogen, Pseudocercospora fijiensis.

PLoS One 2019 25;14(7):e0220319. Epub 2019 Jul 25.

Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States of America.

Disease spread of Pseudocercospora fijiensis, causal agent of the black Sigatoka disease of banana, depends on ascospores produced through the sexual reproductive cycle. We used phylogenetic analysis to identify P. fijiensis homologs (PKS8-4 and Hybrid8-3) to the PKS4 polyketide synthases (PKS) from Neurospora crassa and Sordaria macrospora involved in sexual reproduction. Read More

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The cell wall proteome from two strains of Pseudocercospora fijiensis with differences in virulence.

World J Microbiol Biotechnol 2019 Jul 2;35(7):105. Epub 2019 Jul 2.

Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, A.C., Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo, C.P. 97205, Mérida, Yucatán, Mexico.

Pseudocercospora fijiensis causes black Sigatoka disease, the most important threat to banana. The cell wall is crucial for fungal biological processes, including pathogenesis. Here, we performed cell wall proteomics analyses of two P. Read More

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, an Endophyte That Establishes a Nutrient-Transfer Symbiosis With Banana Plants and Protects Against the Black Sigatoka Pathogen.

Front Microbiol 2019 7;10:804. Epub 2019 May 7.

Department of Chemistry, Universidad Autónoma de Guadalajara, Zapopan, Mexico.

Banana ( spp.) is an important crop worldwide, but black Sigatoka disease caused by the fungus threatens fruit production. In this work, we examined the potential of the endophytes of banana plants and , as antagonists of and support plant growth in nutrient limited soils by N-transfer. Read More

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Management of Type 2 Diabetes and Chronic Kidney Disease in Fiji in 2018: Knowledge, Attitude, and Practice of Patients.

Rev Diabet Stud 2019 19;15:26-34. Epub 2019 May 19.

School of Public Health and Primary Care, Fiji National University.

Objective: The aim was to identify the level of knowledge, attitude, and practice (KAP) in patients with type 2 diabetes (T2D) and chronic kidney disease (CKD) at Sigatoka Subdivisional Hospital (SSH) in 2018 since no studies have been done on this issue so far in Fiji.

Methods: A quantitative, cross-sectional study including 225 patients was carried out July 1, 2018, through August 31, 2018, using a validated self-structured questionnaire. Fijians, aged 30 years or above, with confirmed T2D and CKD who were attending the Special Outpatient Department (SOPD) at SSH, were included in the study using a purposive sampling method to identify eligible participants. Read More

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Determinants of knowledge, attitude and practice in patients with both type 2 diabetes and chronic kidney disease in Fiji.

F1000Res 2019 1;8:239. Epub 2019 Mar 1.

School of Public Health and Primary Care, Fiji National University, Suva, Fiji.

In Fiji, Type 2 diabetes mellitus (T2DM) and Chronic kidney disease (CKD) are amongst the top four causes of premature mortality, disability and death. This study aims to identify the determinants of knowledge, attitude and practice (KAP) in T2DM patients with CKD in Fiji in 2018. A cross-sectional study was conducted at Sigatoka Sub-divisional Hospital (SSH) in Fiji in July-August, 2018 using a self-structured questionnaire to test KAP of 225 patients. Read More

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Climate change effects on Black Sigatoka disease of banana.

Daniel P Bebber

Philos Trans R Soc Lond B Biol Sci 2019 06;374(1775):20180269

Department of Biosciences, University of Exeter , EX4 4QD Exeter , UK.

Climate change has significantly altered species distributions in the wild and has the potential to affect the interactions between pests and diseases and their human, animal and plant hosts. While several studies have projected changes in disease distributions in the future, responses to historical climate change are poorly understood. Such analyses are required to dissect the relative contributions of climate change, host availability and dispersal to the emergence of pests and diseases. Read More

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A novel polyketide synthase gene cluster in the plant pathogenic fungus Pseudocercospora fijiensis.

PLoS One 2019 8;14(2):e0212229. Epub 2019 Feb 8.

Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States of America.

Pseudocercospora fijiensis, causal agent of black Sigatoka of banana, produces polyketide synthase (PKS) pathways shown to be important in disease development by related Dothideomycete fungi. Genome analysis of the P. fijiensis PKS8-1 gene identified it as part of a gene cluster including genes encoding two transcription factors, a regulatory protein, a glyoxylase/beta-lactamase-like protein, an MFS transporter, a cytochrome P450, two aldo/keto reductases, a dehydrogenase, and a decarboxylase. Read More

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November 2019

Increased Silicon Acquisition in Bananas Colonized by MUCL 41833 Reduces the Incidence of .

Front Plant Sci 2018 9;9:1977. Epub 2019 Jan 9.

Mycology, Applied Microbiology, Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium.

This work aimed to test the hypothesis that the combination of arbuscular mycorrhizal fungi (AMF) and accumulation of silicon (Si) in banana plants via its uptake and transport by the fungus reduces the incidence of Black Leaf Steak Disease (BLSD) caused by . A pot experiment was conducted to compare BLSD symptoms on leaves of banana plants colonized or not by the AMF MUCL 41833 and exposed or not to Si added to the growth substrate. A marked increase in plant growth parameters (i. Read More

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January 2019

Early Detection of the Fungal Banana Black Sigatoka Pathogen by an SPR Immunosensor Method.

Sensors (Basel) 2019 Jan 23;19(3). Epub 2019 Jan 23.

Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Laboratorio de Biotecnología. Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza C.P. 66455, Nuevo León, Mexico.

Black Sigatoka is a disease that occurs in banana plantations worldwide. This disease is caused by the hemibiotrophic fungus , whose infection results in a significant reduction in both product quality and yield. Therefore, detection and identification in the early stages of this pathogen in plants could help minimize losses, as well as prevent the spread of the disease to neighboring cultures. Read More

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January 2019

Readiness for Environmental Release of Genetically Engineered (GE) Plants in Uganda.

Front Bioeng Biotechnol 2018 24;6:152. Epub 2018 Oct 24.

Program for Biosafety Systems, Kampala, Uganda.

Research and development of genetically engineered (GE) crops in Uganda was initiated in 2003 with the launch of a national agricultural biotechnology center at Kawanda in central Uganda. The country has now approved 17 field experiments for GE plants, which were first established in 2006 with the planting of a banana confined field trial that evaluated performance of plants modified to express resistance to black sigatoka disease. Researchers leading the GE experiments have indicated that some of these GE plants are ready for environmental release that is moving beyond confined field testing toward commercialization. Read More

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October 2018

Development of a rapid methodology for biological efficacy assessment in banana plantations: application to reduced dosages of contact fungicide for Black Leaf Streak Disease (BLSD) control.

Pest Manag Sci 2019 Apr 22;75(4):1081-1090. Epub 2018 Dec 22.

ITAP, Irstea, Montpellier SupAgro, Université de Montpellier, Montpellier, France.

Background: Black sigatoka is the main disease of banana crop production and is controlled by using either systemic or contact fungicides through spray applications. Biological efficacy is typically assessed on a whole cropping cycle with a natural infestation and periodic spray applications. Developing a faster methodology for assessment of the biological efficacy of a contact fungicide offers promising perspectives for testing current and new fungicides or application techniques. Read More

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Silencing of the Mitogen-Activated Protein Kinases (MAPK) and in Reduces Growth and Virulence on Host Plants.

Front Plant Sci 2018 13;9:291. Epub 2018 Mar 13.

International Institute of Tropical Agriculture, Nairobi, Kenya.

, causal agent of the black Sigatoka disease (BSD) of spp., has spread globally since its discovery in Fiji 1963 all the banana and plantain growing areas across the globe. It is becoming the most damaging and economically important disease of this crop. Read More

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Thap Maeo bananas: Fast ripening and full ethylene perception at low doses.

Food Res Int 2018 03 10;105:384-392. Epub 2017 Nov 10.

University of São Paulo, Department of Food Science and Experimental Nutrition, FCF, São Paulo, Brazil; Food Research Center (FoRC-CEPID), São Paulo, Brazil. Electronic address:

Brazil is a major producer and consumer of various banana types. Thap Maeo is a promising cultivar for the market due to its resistance to Black and Yellow Sigatoka disease. However, a lack of information and postharvest technologies concerning Thap Maeo physiology seems to be a significant problem limiting its expansion in the market. Read More

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A new mechanism for reduced sensitivity to demethylation-inhibitor fungicides in the fungal banana black Sigatoka pathogen Pseudocercospora fijiensis.

Mol Plant Pathol 2018 06 13;19(6):1491-1503. Epub 2018 Feb 13.

Wageningen University and Research, Wageningen Plant Research, 6700 AA Wageningen, the Netherlands.

The Dothideomycete Pseudocercospora fijiensis, previously Mycosphaerella fijiensis, is the causal agent of black Sigatoka, one of the most destructive diseases of bananas and plantains. Disease management depends on fungicide applications, with a major contribution from sterol demethylation-inhibitors (DMIs). The continued use of DMIs places considerable selection pressure on natural P. Read More

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Thiophanate-Methyl Resistance and Fitness Components of Colletotrichum musae Isolates from Banana in Brazil.

Plant Dis 2017 Sep 6;101(9):1659-1665. Epub 2017 Jul 6.

Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, 52171-900, Pernambuco, Brazil.

Anthracnose, caused by Colletotrichum musae, is the most important postharvest disease of banana and is widely distributed among the banana production regions in Brazil. Although thiophanate-methyl is a fungicide frequently used in Brazilian banana orchards to control Sigatoka leaf spot, Collettotrichum populations are also exposed, resulting in the evolution of fungicide resistance and the inability to manage banana anthracnose. We investigated 139 Brazilian isolates of C. Read More

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September 2017

Population Structure of Pseudocercospora fijiensis in Costa Rica Reveals Shared Haplotype Diversity with Southeast Asian Populations.

Phytopathology 2017 12 9;107(12):1541-1548. Epub 2017 Oct 9.

First, second, third, and sixth authors: Department of Plant Pathology, North Carolina State University, Raleigh 27695; third author: Department of Genetics and Biochemistry, Clemson University, Clemson, SC 29631; fourth author: Dole Standard Fruits, SA, Tropical Research Department, Rio Frio, Costa Rica; and fifth author: Agronomic Research Center, University of Costa Rica, San Pedro, Montes de Oca, Costa Rica.

Pseudocercospora fijiensis is the causal pathogen of black Sigatoka, a devastating disease of banana that can cause 20 to 80% yield loss in the absence of fungicides in banana crops. The genetic structure of populations of P. fijiensis in Costa Rica was examined and compared with Honduran and global populations to better understand migration patterns and inform management strategies. Read More

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December 2017

-Mediated Transformation of to Determine the Role of in Osmotic Stress Regulation and Virulence Modulation.

Front Microbiol 2017 16;8:830. Epub 2017 May 16.

International Institute of Tropical AgricultureNairobi, Kenya.

Black Sigatoka disease, caused by is a serious constraint to banana production worldwide. The disease continues to spread in new ecological niches and there is an urgent need to develop strategies for its control. The high osmolarity glycerol (HOG) pathway in is well known to respond to changes in external osmolarity. Read More

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Antimycotic activity of fengycin C biosurfactant and its interaction with phosphatidylcholine model membranes.

Colloids Surf B Biointerfaces 2017 Aug 10;156:114-122. Epub 2017 May 10.

Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain. Electronic address:

Lipopeptide biosurfactants constitute one of the most promising groups of compounds for the treatment and prevention of fungal diseases in plants. Bacillus subtilis strain EA-CB0015 produces iturin A, fengycin C and surfactin and it has been proven useful for the treatment of black Sigatoka disease in banana plants, an important pathology caused by the fungus Mycosphaerella fijiensis (Morelet). We have found that B. Read More

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Functional and evolutionary characterization of Ohr proteins in eukaryotes reveals many active homologs among pathogenic fungi.

Redox Biol 2017 08 2;12:600-609. Epub 2017 Apr 2.

Departmento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil. Electronic address:

Ohr and OsmC proteins comprise two subfamilies within a large group of proteins that display Cys-based, thiol dependent peroxidase activity. These proteins were previously thought to be restricted to prokaryotes, but we show here, using iterated sequence searches, that Ohr/OsmC homologs are also present in 217 species of eukaryotes with a massive presence in Fungi (186 species). Many of these eukaryotic Ohr proteins possess an N-terminal extension that is predicted to target them to mitochondria. Read More

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Mate Limitation in Fungal Plant Parasites Can Lead to Cyclic Epidemics in Perennial Host Populations.

Bull Math Biol 2017 03 13;79(3):430-447. Epub 2017 Jan 13.

IGEPP, Agrocampus Ouest, INRA, Université de Rennes 1, Université Bretagne-Loire, 35000, Rennes, France.

Fungal plant parasites represent a growing concern for biodiversity and food security. Most ascomycete species are capable of producing different types of infectious spores both asexually and sexually. Yet the contributions of both types of spores to epidemiological dynamics have still to been fully researched. Read More

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