scholarly journals Studies on host-specific AF-toxins produced by Alternaria alternata strawberry pathotype causing alternaria black spot of strawberry. 1. Production of host-specific toxins and their biological activities.

1984 ◽  
Vol 50 (5) ◽  
pp. 600-609 ◽  
Author(s):  
Nitaro MAEKAWA ◽  
Mikihiro YAMAMOTO ◽  
Syoyo NISHIMURA ◽  
Keisuke KOHMOTO ◽  
Masahiro KUWADA ◽  
...  
Keyword(s):  
Alternaria Alternata ◽  
Biological Activities ◽  
Black Spot ◽  
Host Specific Toxins

scholarly journals Whole Genome Sequence of Alternaria alternata, the Causal Agent of Black Spot of Kiwifruit

2021 ◽  
Vol 12 ◽  
Author(s):  
Ke Huang ◽  
Jianming Tang ◽  
Yong Zou ◽  
Xiangcheng Sun ◽  
Jianbin Lan ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Virulence Factors ◽  
Genome Sequence ◽  
Alternaria Alternata ◽  
Black Spot ◽  
Transcriptional Regulators ◽  
Whole Genome Sequence ◽  
Economic Losses ◽  
Wide Range ◽  
Host Specific Toxins

Alternaria alternata is a pathogen in a wide range of agriculture crops and causes significant economic losses. A strain of A. alternata (Y784-BC03) was isolated and identified from “Hongyang” kiwifruit and demonstrated to cause black spot infections on fruits. The genome sequence of Y784-BC03 was obtained using Nanopore MinION technology. The assembled genome is composed of 33,869,130bp (32.30Mb) comprising 10 chromosomes and 11,954 genes. A total of 2,180 virulence factors were predicted to be present in the obtained genome sequence. The virulence factors comprised genes encoding secondary metabolites, including non-host-specific toxins, cell wall-degrading enzymes, and major transcriptional regulators. The predicted gene clusters encoding genes for the biosynthesis and export of secondary metabolites in the genome of Y784-BC03 were associated with non-host-specific toxins, including cercosporin, dothistromin, and versicolorin B. Major transcriptional regulators of different mycotoxin biosynthesis pathways were identified, including the transcriptional regulators, polyketide synthase, P450 monooxygenase, and major facilitator superfamily transporters.

Methyl p-coumarate inhibits black spot rot on jujube fruit through membrane damage and oxidative stress against Alternaria alternata

2018 ◽  
Vol 145 ◽  
pp. 230-238 ◽  
Author(s):  
Wusun Li ◽  
Shuzhi Yuan ◽  
Qianqian Li ◽  
Weina Sang ◽  
Jiankang Cao ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Alternaria Alternata ◽  
Membrane Damage ◽  
Black Spot ◽  
Jujube Fruit ◽  
And Oxidative Stress

scholarly journals First report of Alternaria black spot of rose caused by Alternaria alternata in China

2019 ◽  
Vol 102 (1) ◽  
pp. 273-273
Author(s):  
Peihong Fang ◽  
Shaochuan Shi ◽  
Xintong Liu ◽  
Zhao Zhang
Keyword(s):  
Alternaria Alternata ◽  
Black Spot ◽  
First Report

scholarly journals Fungal diseases of Rose plant in Bangladesh

2014 ◽  
Vol 38 (2) ◽  
pp. 225-233 ◽  
Author(s):  
Anita Ghosh ◽  
Shamim Shamsi
Keyword(s):  
Aspergillus Flavus ◽  
Alternaria Alternata ◽  
Trichoderma Viride ◽  
Black Spot ◽  
Fungal Diseases ◽  
Rhizopus Stolonifer ◽  
Penicillium Sp ◽  
Botrytis Allii ◽  
Fusarium Sp ◽  
Academy Of Sciences

Five types of symptom were recorded on two varieties of rose plant. The symptoms were Black spot, Leaf spot1, Leaf spot2, Blight and Anthracnose. The study revealed the presence of 20 species of fungi belonging to 17 genera. The isolated fungi were Alternaria alternata (Fr.) Keissler, Arthrinium saccharicola Stevenson, Aspergillus flavus, Link., A. niger van Tiegh., Botrytis allii Munn, Cercospora sp., Cladosporium cladosporioides (Fresen.) de Vries, C. oxysporum Berk. & Curt., two species of Colletotrichum, Curvularia brakyospora Boedijn, Curvularia pallescens Boedijn, Fusarium sp., Epicoccum purpurascens Ehreneb ex Schlecht; Link, Gibberella sp., Marssonina rosea (Lib.) Died, Nigrospora sphaerica (Sacc.) Masson, Pestalotiopsis guepinii (Desm.) Stay. with its two culture types, Penicillium sp., Rhizopus stolonifer (Ehrenb. Ex. Fr) Vuill. and Trichoderma viride Pers. ex Fries. The frequency (%) of association of P. guepinii was higher than any other fungi. Pestalotiopsis guepinii and its two culture types were found to be pathogenic to rose plant. DOI: http://dx.doi.org/10.3329/jbas.v38i2.21347 Journal of Bangladesh Academy of Sciences, Vol. 38, No. 2, 225-233, 2014

scholarly journals Benzyl isothiocyanate fumigation inhibits growth, membrane integrity and mycotoxin production in Alternaria alternata

RSC Advances ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 1829-1837
Author(s):  
Tiaolan Wang ◽  
Yongcai Li ◽  
Yang Bi ◽  
Miao Zhang ◽  
Tingting Zhang ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Alternaria Alternata ◽  
Membrane Integrity ◽  
Black Spot ◽  
Causal Agent ◽  
Benzyl Isothiocyanate ◽  
Mycotoxin Production

The antifungal activity of benzyl isothiocyanate (BITC) against pear pathotype-Alternaria alternata, the causal agent of pear black spot, and its possible mechanisms were studied.

scholarly journals Micromycetes on climbing roses leaves (Rosa L.) in the Botanic Garden of the Jagiellonian University in Cracow

2015 ◽  
Vol 50 (1) ◽  
Author(s):  
Maria Kowalik ◽  
Klaudia Duda-Franiak
Keyword(s):  
Alternaria Alternata ◽  
Black Spot ◽  
Growing Season ◽  
High Abundance ◽  
Botanic Garden ◽  
Epicoccum Nigrum ◽  
Diplocarpon Rosae ◽  
Sordaria Fimicola ◽  
Penicillium Brevicompactum

<p>Micromycetes inhabiting the leaves of 20 cultivars of climbing roses (<em>Rosa</em> L.), grown in Botanic Garden of the Jagiellonian University in Cracow was investigated in the three successive years of research. Sixty-five taxa of of micromycetes was recorded with a few species dominating: <em>Alternaria alternata</em>, <em>Epicoccum nigrum</em>, <em>Pestalotia rosae</em>, <em>Penicillium brevicompactum</em> and <em>Sordaria fimicola</em>, accompanied by various other microfungi. A high abundance of rose black spot caused by <em>Diplocarpon rosae</em> was also observed. The affected leaves revealed advancing necrosis, substantially enhancing at the end of the growing season. Defoliation took place from June to October. Micromycetes inhabiting the leaves of climbing roses in Botanic Garden of the Jagiellonian University in Cracow considerably deteriorated the decorative aspect of the plants.</p>

scholarly journals Dual species dynamic transcripts reveal the interaction mechanisms between Chrysanthemum morifolium and Alternaria alternata

2020 ◽  
Author(s):  
Lina Liu ◽  
Fadi Chen ◽  
Sumei Chen ◽  
Weimin Fang ◽  
Ye Liu ◽  
...  
Keyword(s):  
Alternaria Alternata ◽  
Interaction Mechanism ◽  
Black Spot ◽  
Chrysanthemum Morifolium ◽  
Potential Interaction ◽  
Late Infection ◽  
Rna Seq ◽  
Key Genes ◽  
Highly Correlated ◽  
Infection Stage

Abstract Background: Chrysanthemum (C. morifolium) black spot disease caused by Alternaria alternata is one of the plant’s most destructive diseases. Dual RNA-seq was performed to simultaneously assess their transcriptomes to analyze the potential interaction mechanism between the two species, i.e., host and pathogen. Results: C. morifolium and A. alternata were subjected to dual RNA-seq at 1, 12, and 24 hours after inoculation, and differential expression genes (DEGs) in both species were identified. This analysis confirmed 153,532 DEGs in chrysanthemum and 14,932 DEGs in A. alternata, that were involved in plant-fungal interactions and phytohormone signaling. Fungal DEGs such as toxin synthesis related enzyme and cell wall degrading enzyme genes played important roles during chrysanthemum infecton. Moreover, a series of key genes highly correlated with the early, middle, or late infection stage was identified, together with the regulatory network of key genes annotated in PRG or PPI databases. Highly correlated genes were identified at the late infection stage, expanding our understanding of the interplay between C. morifolium and A. alternata. Additionally, six DEGs each from chrysanthemum and A. alternata were selected for qRT-PCR assays to validate the RNA-seq output. Conclusions: Collectively, data obtained in this study enriches the resources available for research into the interactions that exist between chrysanthemum and A. alternata, thereby providing a theoretical basis for the development of new chrysanthemum cultivars with resistance to pathogen.

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