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Registros recuperados: 15
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A new species of Albugo parasitic to Arabidopsis thaliana reveals new evolutionary patterns in white blister rusts (Albuginaceae) Naturalis
Thines, M.; Choi, Y.-J.; Kemen, E.; Ploch, S.; Holub, E.B.; Shin, H.-D.; Jones, J.D.G..
The obligate biotrophic lineages of the white blister rusts (Albuginales, Oomycota) are of ancient origin compared to the rather recently evolved downy mildews, and sophisticated mechanisms of biotrophy and a high degree of adaptation diversity are to be expected in these organisms. Speciation in the biotrophic Oomycetes is usually thought to be the consequence of host adaptation or geographic isolation. Here we report the presence of two distinct species of Albugo on the model plant Arabidopsis thaliana, Albugo candida and Albugo laibachii, the latter being formally described in this manuscript. Both species may occupy the same host within the same environment, but are nevertheless phylogenetically distinct, as inferred from analyses of both mitochondrial...
Tipo: Article / Letter to the editor Palavras-chave: Albuginales; Effector gene; Oospore morphology; Phylogeny; Plant pathogen; Speciation.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/532153
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ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI Acta biol.Colomb.
SANTOS,Andrés; NÚÑEZ-MONTERO,Kattia; LAMILLA,Claudio; PAVEZ,Mónica; QUEZADA-SOLÍS,Damián; BARRIENTOS,Leticia.
ABSTRACT The extreme weather conditions in the Antarctic have exerted selective pressures favoring differential features in bacteria to survive this untapped environment (i.e., antibiotic molecules). Notably, higher chances of antibiotic discovery from extremophiles have been proposed recently. Although new organic and environmentally friendly sources for helping in the control of plant pathogenic fungi are necessary, the information about anti-phytopathogenic applications of extremophile microorganisms from untapped environments is limited. In this study, we determined the antifungal effect of actinobacterial strains isolated from Antarctic soils and sediments. Co-culture inhibition assays and Minimum Inhibitory Concentration (MIC) determination revealed...
Tipo: Journal article Palavras-chave: Antagonism; Antarctic bacteria; Antifungal; Extremophile; Plant pathogen.
Ano: 2020 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000200353
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Biotechnology and crop protection in Brazil. Repositório Alice
CAMPANHOLA, C.; RODRIGUES, G. S.; BETTIOL, W..
bitstream/item/180097/1/Companhola-Biotechnology-3564.pdf
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Productivity; Pesticide; Insect pest; Plant pathogen; Genetic control; Soybean; Tomato; Rubber tree; Coconut; Apple; Strawberry; Cana-de-açúcar; Agrotóxico; Alfafa; Agricultura; Arroz; Banana; Coco; Controle Biológico; Controle Genético; Erva Daninha; Fumo; Maçã; Morango; Praga de Planta; Produtividade; Seringueira; Soja; Alfalfa; Agriculture; Biological control; Rice; Sugarcane; Tobacco; Weed control.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/13013
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Botryosphaeriaceae from Eucalyptus plantations and adjacent plants in China Naturalis
Li, G.Q.; Liu, F.F.; Li, J.Q.; Liu, Q.L.; Chen, S.F..
The Botryosphaeriaceae is a species-rich family that includes pathogens of a wide variety of plants, including species of Eucalyptus. Recently, during disease surveys in China, diseased samples associated with species of Botryosphaeriaceae were collected from plantation Eucalyptus and other plants, including Cunninghamina lanceolata, Dimocarpus longan, Melastoma sanguineum and Phoenix hanceana, which were growing adjacent to Eucalyptus. In addition, few samples from Araucaria cunninghamii and Cedrus deodara in two gardens were also included in this study. Disease symptoms observed mainly included stem canker, shoot and twig blight. In this study, 105 isolates of Botryosphaeriaceae were collected from six provinces, of which 81 isolates were from Eucalyptus...
Tipo: Article / Letter to the editor Palavras-chave: Botryosphaeria; Cophinforma; Lasiodiplodia; Neofusicoccum; Pathogenicity; Plant pathogen.
Ano: 2018 URL: http://www.repository.naturalis.nl/record/639310
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Boty-II, a novel LTR retrotransposon in Botrytis cinerea B05.10 revealed by genomic sequence Electron. J. Biotechnol.
Zhao,Ming; Zhou,Jin yan; Li,Zhi dong; Song,Wei wei; Tan,You jiu; Tan,Hong.
Botrytis cinerea is a necrotrophic pathogen causing pre- and post-harvest diseases in at least 235 plant species. It manifests extraordinary genotype and phenotype variation. One of the causes of this variation is transposable elements. Two transposable elements have been discovered in this fungus, the retrotransposon (Boty), and the transposon (Flipper). In this work, two complete (Boty-II-76 and Boty-II-103) and two partial (Boty-II-95 and Boty-II-141) long terminal repeat (LTR) retrotransposons were identified by an in silico genomic sequence analysis. Boty-II-76 and Boty-II-103 contain 6439 bp nucleotides with a pair of LTRs at both ends, and an internal deduced pol gene encoding a polyprotein with reverse transcriptase and DDE integrase domains. They...
Tipo: Journal article Palavras-chave: Botrytis cinerea; LTR retrotransposons; Molecular marker; Plant pathogen; Population diversity; Transposable elements.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000300002
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Colletotrichum species causing anthracnose disease of chili in China Naturalis
Diao, Y.-Z.; Zhang, C.; Liu, F.; Wang, W.-Z.; Liu, L.; Cai, L.; Liu, X.-L..
Anthracnose caused by Colletotrichum species is a serious disease of more than 30 plant genera. Several Colletotrichum species have been reported to infect chili in different countries. Although China is the largest chiliproducing country, little is known about the species that have been infecting chili locally. Therefore, we collected samples of diseased chili from 29 provinces of China, from which 1285 strains were isolated. The morphological characters of all strains were observed and compared, and multi-locus phylogenetic analyses (ITS, ACT, CAL, CHS-1, GAPDH, TUB2, and HIS3) were performed on selected representative strains. Fifteen Colletotrichum species were identified, with C. fioriniae, C. fructicola, C. gloeosporioides, C. scovillei, and C....
Tipo: Article / Letter to the editor Palavras-chave: DNA phylogeny; Multi-gene analysis; Plant pathogen; Systematics.
Ano: 2017 URL: http://www.repository.naturalis.nl/record/614095
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Differences in intracellular localization of corn stunt spiroplasmas in magnesium treated maize Biocell
Nome,Claudia; Magalhães,Paulo César; Oliveira,Elizabeth; Nome,Sergio; Laguna,Irma Graciela.
Maize plants infected with Spiroplasma kunkelii show symptoms similar to that of plants in a magnesium-deficient soil, and it has been shown that the spiroplasma alters the plants' magnesium absorption. In the current study we compared changes associated to either spiroplasma infection, two soil magnesium levels and their combinations. Plant symptoms were recorded and correlated with transmission electron microscopy observations. Plants grown on a high magnesium treatment showed no macroscopical alterations nor organelle ultrastructural alterations, while plants on a low magnesium treatment showed macroscopical vein yellowing and, ultrastructurally, they had most chloroplasts and mitochondrial membranes altered. Infected plants on a low magnesium treatment...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Mollicutes; Cytopathology; Plant pathogen; Magnesium deficiency.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452009000200008
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Elucidating the Ramularia eucalypti species complex Naturalis
Videira, S.I.R.; Groenewald, J.Z.; Kolecka, A.; Haren, L. van; Boekhout, T.; Crous, P.W..
The genus Ramularia includes numerous phytopathogenic species, several of which are economically important. Ramularia eucalypti is currently the only species of this genus known to infect Eucalyptus by causing severe leaf-spotting symptoms on this host. However, several isolates identified as R. eucalypti based on morphology and on nrDNA sequence data of the ITS region have recently been isolated from other plant hosts, from environmental samples and also from human clinical specimens. Identification of closely related species based on morphology is often difficult and the ITS region has previously been shown to be unreliable for species level identification in several genera. In this study we aimed to resolve this species-complex by applying a polyphasic...
Tipo: Article / Letter to the editor Palavras-chave: Mycosphaerellaceae; Plant pathogen; Species complex; Systematics.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/560060
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Exploring fungal mega-diversity: Pseudocercospora from Brazil Naturalis
Silva, M.; Barreto, R.W.; Pereira, O.L.; Freitas, N.M.; Groenewald, J.Z.; Crous, P.W..
Although the genus Pseudocercospora has a worldwide distribution, it is especially diverse in tropical and subtropical countries. Species of this genus are associated with a wide range of plant species, including several economically relevant hosts. Preliminary studies of cercosporoid fungi from Brazil allocated most taxa to Cercospora, but with the progressive refinement of the taxonomy of cercosporoid fungi, many species were relocated to or described in Pseudocercospora. Initially, species identification relied mostly on morphological features, and thus no cultures were preserved for later phylogenetic comparisons. In this study, a total of 27 Pseudocercospora spp. were collected, cultured, and subjected to a multigene analysis. Four genomic regions...
Tipo: Article / Letter to the editor Palavras-chave: Biodiversity; Capnodiales; Cercosporoid; Dothideomycetes; Multigene phylogeny; Mycosphaerellaceae; Plant pathogen; Systematics.
Ano: 2016 URL: http://www.repository.naturalis.nl/record/611856
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Phytophthora parasitica transcriptome, a new concept in the understanding of the citrus gummosis Genet. Mol. Biol.
Rosa,Daniel D.; Campos,Magnólia A.; Targon,Maria Luisa P.N.; Souza,Alessandra A..
Due to the economic importance of gummosis disease for the citriculture, studies on P. parasitica-Citrus interaction comprise a significant part in the Brazilian Citrus genome data bank (CitEST). Among them, two cDNA libraries constructed from two different growth conditions of the P. parasitica pathogen are included which has generated the PP/CitEST database (CitEST - Center APTA Citros Sylvio Moreira/IAC- Millennium Institute). Through this genomic approach and clustering analyses the following has been observed: out of a total of 13,285 available in the Phytophthora parasitica database, a group of 4,567 clusters was formed, comprising 2,649 singlets and 1,918 contigs. Out of a total of 4,567 possible genes, only 2,651 clusters were categorized; among...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus disease; Elicitins; Plant pathogen; Gene expression profiles.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000500028
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Pressions de sélection des variétés résistantes sur les populations de bioagresseurs: recherche de critères pour la sélection de variétés à résistance durable National Institute of Agronomic Research
Boissot, Nathalie; Palloix, Alain; Maisonneuve, Brigitte.
Tipo: Working Paper Palavras-chave: Selective pressure; Ecology; Population dynamics; Plant pathogen; Bioagresseur; Pression sélective; Ecologie; Dynamique des populations.
Ano: 2008 URL: http://hdl.handle.net/2174/185
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Research in plant pathology Thai Agricultural
Udom Pupipat; Vichai Korpraditskul; Kitti Choonhawongse; Anderson, Terry; Renfro, B.L..
12 tables
Palavras-chave: Corn; Maize; Plant pathology; Downy mildew; Plant pathogen; Curvularia; ข้าวโพด; โรคราน้ำค้าง; เชื้อสาเหตุ.
Ano: 1971 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3763
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Specific amplification of iron receptor genes in Xylella fastidiosa strains from different hosts Genet. Mol. Biol.
Pacheco,Flávia Teresa Hansen; Silva-Stenico,Maria Estela; Etchegaray,Augusto; Gomes,José Elias; Carrilho,Emanuel; Tsai,Siu Mui.
Bacterial production of siderophores may involve specific genes related to nonribosomal peptide and polyketide biosynthesis, which have not been fully identified in the genome of Xylella fastidiosa strain 9a5c. However, a search for siderophore-related genes in strain 9a5c indicated five membrane receptors, including siderophore, ferrichrome-iron and hemin receptors. All these biomolecules are thought to be associated with iron transport and utilization. Eighty isolates obtained from citrus orchards containing trees that developed citrus variegated chlorosis (CVC) were screened for siderophore production. The results demonstrated that only 10 of the isolates did not produce siderophores. Additional strains obtained from coffee, almond, mulberry, elm,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus variegated chlorosis; Plant pathogen; Iron-transportation; Pyoverdine; Enterobactin; Polyketide synthase; Peptide synthetase.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100026
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The potential of compounds isolated from Xylaria spp. as antifungal agents against anthracnose BJM
Elias,Luciana M.; Fortkamp,Diana; Sartori,Sérgio B.; Ferreira,Marília C.; Gomes,Luiz H.; Azevedo,João L.; Montoya,Quimi V.; Rodrigues,André; Ferreira,Antonio G.; Lira,Simone P..
ABSTRACT Anthracnose is a crop disease usually caused by fungi in the genus Colletotrichum or Gloeosporium. These are considered one of the main pathogens, causing significant economic losses, such as in peppers and guarana. The current forms of control include the use of resistant cultivars, sanitary pruning and fungicides. However, even with the use of some methods of controlling these cultures, the crops are not free of anthracnose. Additionally, excessive application of fungicides increases the resistance of pathogens to agrochemicals and cause harm to human health and the environment. In order to find natural antifungal agents against guarana anthracnose, endophytic fungi were isolated from Amazon guarana. The compounds piliformic acid and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 2-Hexylidene-3-methylbutanedioic acid; Amazon; Anthracnose; Plant pathogen.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400840
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การยับยั้งโรคที่เกิดจาก Acidovorax avenae subsp. avenae โดยเชื้อแบคทีเรียปฏิปักษ์ท้องถิ่นที่มีความสัมพันธ์กับปริมาณการสะสมคลอโรฟิลล์ที่เพิ่มขึ้นในข้าวโพดหวาน Thai Agricultural
Supot Kasem; Nalina Hemsanit; Lawan Kladsuwan; Waraporn Boonkeat; Sutruedee Prathuangwong.
Investigation was design as RCBD with 4 replications using sweet corn cv.Insee2 under field conditions at National Corn and Sorghum Research Center, Nakhornrachasrima during early raining season of year 2009. The results revealed that chlorophyll accumulation was highest plants inoculated as seed treatment (0.5 g/100 g seeds,1*10**(5) cfu/ml) and 3-foliar sprays at 14 21 and 28 days (5 g/20 L-water, 1*10**(9) cfu/ml) with P. fluorescens SP007s (ISR-P), followed treatment applied with fresh cell formula of P. fluorescens SP007s and B.licheniformis P38 (1*10**(6) cfu/ml and 1*10**(8) cfu/ml for seed treatment and foliar spray respectively) of 6.87, 7.03, and 7.57 mg/g-leaf chlorophyll content activity respective. The accumulation of chlorophyll content...
Palavras-chave: Corn; Plant diseases; Acidovorax avenae; Management; Biological control; Plant pathogen; Seed treatment; Induced resistance; Physiology of plant disease; ข้าวโพดหวาน; โรคพืช; แบคทีเรีย; การจัดการ; แบคทีเรียปฏิปักษ์ท้องถิ่น; การควบคุมโรคโดยชีววิธี; การคลุกเมล็ด; การเพิ่มความต้านทาน; สรีรวิทยาของพืชเป็นโรค; การสะสมคลอโรฟิลล์.
Ano: 2010 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4681
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