Associação de Rhizoctonia solani Grupo de Anastomose 4 (AG-4 HGI e HGIII) à espécies de plantas invasoras de área de cultivo de batata

Silva-Barreto, Fátima Aparecida da; Pereira, Wagner Vicente; Ciampi, Maísa B.; Câmara, Marcos Paz Saraiva; Ceresini, Paulo Cézar

doi:10.1590/s0100-54052010000200007

Cited by 5 publications

(3 citation statements)

References 19 publications

(12 reference statements)

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“…Plant samples with symptoms were taken to the laboratory for reisolation to prove the tissues were infected by the fungus. (Erper et al, 2016;Silva-Barreto et al, 2010;Yang et al, 2015). Therefore, according to our results the PSA medium can also be included as an excellent medium for the growth of Rhizoctonia solani.…”

Section: Discussionmentioning

confidence: 54%

Characterization, pathogenicity and anastomosis groups of Rhizoctonia solani from watermelon

et al. 2019

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The objective of this study was to characterize the morphological and pathogenic variation of Rhizoctonia solani isolates as well as to determine mycelial compatibility and hyphal fusion. The R. solani isolates CMM1053, CMM2967, CMM1052, CMM2983, CMM2971 and CMM3890 from watermelon were used. The determination of aggressiveness was evaluated using the six isolates inoculated in the Crimson Sweet susceptible cultivar in a completely randomized design (CRD) with five replicates, the sample unit consisting of one plant. The experiment of mycelial growth rate was installed in the factorial scheme, 6 isolates x 3 culture media, using the following culture media Nutrient Agar, PDA and PSA, and a total of 5 replicates. The color characterization and sclerotia formation was performed 15 days after the fungal inoculation in each culture medium. For the characterization of vegetative compatibility and occurrence of hyphal fusion, the experiments were performed in CDR with three and two replicates, respectively. CMM1053 and CMM1052 isolates were the most aggressive; however, they were statistically different only from CMM2967 isolate. The PSA medium was the most promising for the mycelial growth. It was possible to observe that there was variability in the colonies color, being higher in the Nutrient Agar medium. Based on evaluations of vegetative compatibility and hyphal fusion, the six isolates belong to the same anastomosis group.

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Section: Discussionmentioning

confidence: 54%

Characterization, pathogenicity and anastomosis groups of Rhizoctonia solani from watermelon

et al. 2019

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“…O AG-4, subdividido em três subgrupos HG I, HG II e HG III, é descrito na literatura como um grupamento que não é tão específico em termos de hospedeiro, podendo causar podridão de sementes, damping off de pré e pós-emergência e, ocasionalmente, podridão de raízes em diversas culturas de importância econômica no Brasil (9). Isto explica a ocorrência da patogenicidade cruzada pelos isolados de Rhizoctonia do AG-4 nos materiais de crisântemo e gipsófila.…”

Section: Cultivar Tratamentounclassified

“…Pers.) e maria-pretinha (Solanum americanum Mill); e R. solani AG-4 HGIII em caruru (Amaranthus hybridus L.) (9). Isto complica ainda mais fontes potenciais de inóculo deste patógeno.…”

Section: Cultivar Tratamentounclassified

Relato de Rhizoctonia solani AG-4 HG I em crisântemo (Papiro Branco e Amarelo) e R. solani AG-4 HG III em gipsófila no estado de São Paulo, Brasil, e sua patogenicidade cruzada

et al. 2013

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RESUMOPalavras-chave adicionais: ornamental, fungo de solo, patogenicidade, Chrisanthemum spp.Atualmente, grupamento de anastomose (AG) de Rhizoctonia sp. em crisântemo e ocorrência deste fungo em gipsófila ainda não foram relatados no Brasil. Assim, realizou-se teste de patogenicidade normal e cruzada e sequenciamento da região ITS-5.8S rDNA para identificar o AG de isolado obtido de plantas de crisântemo (Papiro Branco) e de Bueno, C.J.; Bettiol, W.; Mesa, E.M.; Ceresini, P.C. Relato de Rhizoctonia solani AG-4 HG I em crisântemo (Papiro Branco e Amarelo) e R.solani AG-4 HG III em gipsófila, no estado de São Paulo, Brasil, e sua patogenicidade cruzada. Summa Phytopathologica, v.39, n.4, p.286-289, 2013. O crisântemo é uma das ornamentais mais cultivadas no Brasil, com expressão nos Estados de São Paulo, Rio de Janeiro e Minas Gerais. Há cultivares para corte, para vaso e jardim (1, 3). Gypsophila paniculata L., ornamental conhecida como mosquitinho, pertence à família Caryophyllaceae Lindl. e com ampla distribuição no mundo (4). As suas inflorescências apresentam flores pequenas e brancas, sendo comercializadas, principalmente, para confecção de arranjos e buquês (6).Os patógenos de solo Rhizoctonia sp. e Pythium sp. são relatados como prejudiciais para a cultura do crisântemo, principalmente na fase do enraizamento (2). Relatos de doenças em gipsófila, no Brasil, são escassos. Sabe-se que gipsófila é propagado vegetativamente (6), podendo ocorrer, neste método, problemas fitossanitários, principalmente com fungos de solo.Em A produção de inóculo, bem como a infestação em substrato arenoCurrently, anastomosis groups (AG) of Rhizoctonia sp. on chrysanthemum and occurrence of this fungus on gypsophila have not been reported in Brazil. However, in the present study, normal and cross pathogenicity and sequencing of ITS-5.8S rDNA regions were used to confirm the AG of isolate of Rhizoctonia sp. obtained from Bueno, C.J.; Bettiol, W.; Mesa, E.M.; Ceresini, P.C. Report of Rhizoctonia solani AG-4 HG I on chrysanthemum (White and Yellow Papyrus) and R. solani AG-4 HG III on gypsophila in the São Paulo State, Brazil, and their cross pathogenicity. Summa Phytopathologica, v.39, n.4, p.286-289, 2013. Additional keywords: ornamental, soilborne phytopathogenic fungi, pathogenicity, Chrisanthemum spp. ABSTRACT gipsófila, ambas originárias de Holambra / São Paulo, Brasil. Após os testes, relata-se pela primeira vez a ocorrência de R. solani AG-4 HG I em crisântemo (Papiro Branco e Amarelo) e R. solani AG-4 HG III em gipsófila, no estado de São Paulo, Brasil, e, também, a sua patogenicidade cruzada. chrysanthemum (White Papyrus) and from gypsophila plants cultivated in Holambra / São Paulo, Brazil. After these tests, it was confirmed the report of Rhizoctonia solani AG-4 HG I on chrysanthemum (White and Yellow Papyrus) and R. solani AG-4 HG III on gypsophila in the São Paulo state, Brazil, and also their cross pathogenicity.

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Fungi on Commelina benghalensis from Brazil, with notes on potential for weed biological control

Ferreira

Alves

Miranda

et al. 2017

Trop. plant pathol.

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Commelina benghalensis (tropical spiderwort-TS) is an invasive herbaceous plant, native to South and Southeast Asia and one of the worst agricultural weeds in the tropics. Its management is notoriously difficult because of its ability to regenerate from small fragments and its tolerance to glyphosate applications. There are no published records of biocontrol attempts against TS involving either microbial or arthropod natural enemies. Prior to investigating classical biocontrol agents, surveys have been conducted in Brazil and, more recently, concentrated in Viçosa (state of Minas Gerais) to determine whether fungal pathogens of TS are already present. Five different fungal pathogens were collected. These fungi were identified as causing the following diseases: Athelia rolfsiicrown rot, Cercospora cf. sigesbeckiaeleaf spots, Corynespora cassiicolaleaf spots, Neopyricularia obtusa sp. nov.leaf spots and Rhizoctonia solaniblight. One of the fungi found on TS represents a new taxon, and the others represent either a new host association, a new geographic record or both, except for Corynespora cassiicola, which has already been recorded as able to attack TS (ex-tomato isolates, under controlled conditions) in Brazil. The mycobiota identified in Brazil is limited and lacks many of the TS-specific fungal pathogens recorded in Africa and Asia, namely: Kordyana celebensis, Kordyana indica, Phakopsora tecta, Puccinia commelinae, Uredo ochracea, Bauerago combensis and Bauerago commelinae. It is conjectured here, that such exotic fungi, may offer a valuable resource for management of one of the worst agricultural weeds in Brazil and in the tropical world, and require investigation as biological control agents for introduction in Brazil.

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Associação de Rhizoctonia solani Grupo de Anastomose 4 (AG-4 HGI e HGIII) à espécies de plantas invasoras de área de cultivo de batata

Cited by 5 publications

References 19 publications

Characterization, pathogenicity and anastomosis groups of Rhizoctonia solani from watermelon

Characterization, pathogenicity and anastomosis groups of Rhizoctonia solani from watermelon

Relato de Rhizoctonia solani AG-4 HG I em crisântemo (Papiro Branco e Amarelo) e R. solani AG-4 HG III em gipsófila no estado de São Paulo, Brasil, e sua patogenicidade cruzada

Fungi on Commelina benghalensis from Brazil, with notes on potential for weed biological control

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