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Teixeira, Letícia Magalhães - One of the best experts on this subject based on the ideXlab platform.
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Caracterização de isolados de Fusarium oxysporum e resistência de genótipos de Passiflora à fusariose
Universidade Federal de Uberlândia, 2015Co-Authors: Teixeira, Letícia MagalhãesAbstract:O Brasil é o maior produtor mundial de maracujá, e a podridão do colo do maracujazeiro (Passiflora edulis f. flavicarpa), causada por Fusarium spp., é um dos principais problemas da cultura no Brasil, sendo responsável pelo decréscimo da produtividade. Apesar de no Brasil, o maracujá-amarelo ser propagado predominantemente por via sexual, a utilização de porta-enxertos tolerantes à morte prematura de plantas pode ser uma forma de viabilizar o plantio de maracujazeiros em áreas com histórico da doença. O objetivo do trabalho foi caracterizar os isolados de Fusarium existentes no Triângulo Mineiro e determinar o melhor genótipo a ser utilizado para reduzir as perdas com a doença causada por Fusarium spp. Os isolados de Fusarium sp. foram coletados de plantas com sintomas de lesão vascular, em lavouras comercias de maracujá situadas em Uberlândia, Distrito de Cruzeiro dos Peixotos (Uberlândia), Indianópolis e Prata, MG. O isolamento do fungo foi realizado em BDA e após 10 dias de incubação realizou-se a repicagem em CMA (Corn Meal Agar). O teste de patogenicidade dos isolados foi realizado em mudas de Passiflora edulis aos 45 dias de idade oriundas do Viveiro Flora Brasil. A quantificação da esporulação dos isolados, em 3 diferentes meios, foi determinada através da contagem de conídios na câmara de Neubauer após 10 dias de incubação em extrato de malte 2%, BDA e CMA, em esquema fatorial 4X3 com 5 repetições. As placas de Petri foram incubadas a 22 ± 3ºC e fotoperíodo de 12 horas para crescimento miceliogênico do fungo. A caracterização das estruturas morfológicas dos isolados foi realizada em cultivo mínimo composto pelo meio de Malte a 2% com solo+areia autoclavados na proporção de 1:1. O crescimento micelial de cada isolado foi determinado pelo diâmetro micelial obtido em BDA (Batata Dextrose Agar 39 g L-1), Extrato de malte a 2% e CMA (17 g L-1) aos 10 dias de incubação em um delineamento inteiramente casualizado em arranjo fatorial 4 x 3 com 5 repetições. Cinco dias após a avaliação do crescimento micelial observou-se o aspecto visual das colônias quanto à cor. Três espécies de Passiflora e 2 tipos de mudas foram utilizadas como porta enxerto para avaliar a resistência à fusariose em delineamento de blocos casualizados com quatro repetições em esquema fatorial 3X2 sendo três espécies de Passiflora, Passiflora alata, P. setacea e P. edulis e dois tipos de mudas, pé franco e enxertadas com P. edulis. Todos isolados foram confirmados como fitopatogênicos. O melhor meio para a produção de conídios foi o Extrato de Malte e os isolados mais esporulantes foram LMT01 (AL) e LMT02 (GU). Na caracterização morfológica as colorações dos isolados nos meios de cultura estudados variaram entre branco, rosa e roxo. O BDA foi o pior meio para o crescimento micelial dos isolados apresentando menores médias para o diâmetro de colônia. Apenas LMT02(GU) e LMT04(IN) formaram macro e microconídios. Os formatos, dimensões e número de septos dos macro e microconídios, bem como as características das monofiálides permitiram classificar todos isolados como Fusarium oxysporum f.sp. Passiflorae. No campo Passiflora alata e P. setacea usados como porta enxerto para P.edulis, se mostraram mais resistentes à fusariose. Apesar de P.edulis não sobreviver como pé franco, sua utilização como porta-enxerto promoveu, da mesma forma que P.setacea, o maior crescimento dos ramos secundários aos 180 dias após transplante.Brazil is the major passion fruit producer in the world, and collar rot of Passiflora edulis f. flavicarpa, caused by Fusarium spp., is one of the limiting problems of the crop, significantly reducing yield. Although yellow passion fruit is propagated by seeds, the use of rootstocks tolerant to early death could be a management strategy for cultivation in areas with disease history. Thus, this study characterized Fusarium isolates obtained in Triângulo Mineiro and determined the most suitable genotype to use for grafting to reduce losses caused by fusariosis. Fusarium sp. isolates were obtained from symptomatic plants in commercial areas of Uberlândia, District Cruzeiro dos Peixotos (Uberlândia), Indianópolis and Prata, MG. Fungal isolation was done in PDA and 10 days later, mycelial fragments were transferred to CMA (Corn Meal Agar). Patogenicity test was done in 45-days-old Passiflora edulis seedlings. Sporulation in three different growth media was quantified by counting in Neubauer chamber 10 days after transferring mycelial disks to malt extract-agar 2%, PDA and CMA, in a completely randomized design as a factorial 4X3 with five replications. The isolates were incubated in Petri plates at 22 ± 3ºC and 12 hours lighting to stimulate myceliogenic growth. Characterization of morphological structures of isolates was done with minimum cultivation in Malt extract-agar 2% amended with sterilized soil + sand (1:1). Mycleial growth was determined by measuring colony diameter in PDA (Potato Dextrose Agar 39 g L-1), Malt extract Agar 2% and CMA (17 g L-1) 10 days after incubation, as a 4 x 3 factorial, with 5 replications. Five days later the color of the colonies was evaluated. Three Passiflora species and two seedling types were used to evaluate field resistance to fusariosis, in a randomized block design, as a 3X2 factorial, with three Passiflora species (Passiflora alata, P. setacea and P. edulis) and two seedling types (ungrafted or grafted with P. edulis). All isolates obtained were pathogenic to P. edulis. The best medium for conidium production was Malt extract and most sporulating isolates were LMT01 (AL) and LMT02 (GU). Isolate color varied from white to pink to violet. PDA was the the medium that least favored mycelial growth of the isolates. Only LMT02(GU) and LMT04(IN) formed macro and microconidia. Shape, dimensions and septa number of macroconidia and microconidia, as were as the presence of characteristic monophyalides allowed the classification of all isolates as Fusarium oxysporum f.sp. Passiflorae. Passiflora alata and P. setacea, used as rootstocks for P. edulis in the field, were resistant to fusariosis. Although ungrafted P. edulis does not survive in areas infested with the pathogen, its use as a rootstock promoted, similarly to P. setacea, greater growth of secondary branches 180 days after transplanting to the field
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Caracterização de isolados de Fusarium oxysporum e resistência de genótipos de Passiflora à fusariose
'EDUFU - Editora da Universidade Federal de Uberlandia', 2015Co-Authors: Teixeira, Letícia MagalhãesAbstract:Brazil is the major passion fruit producer in the world, and collar rot of Passiflora edulis f. flavicarpa, caused by Fusarium spp., is one of the limiting problems of the crop, significantly reducing yield. Although yellow passion fruit is propagated by seeds, the use of rootstocks tolerant to early death could be a management strategy for cultivation in areas with disease history. Thus, this study characterized Fusarium isolates obtained in Triângulo Mineiro and determined the most suitable genotype to use for grafting to reduce losses caused by fusariosis. Fusarium sp. isolates were obtained from symptomatic plants in commercial areas of Uberlândia, District Cruzeiro dos Peixotos (Uberlândia), Indianópolis and Prata, MG. Fungal isolation was done in PDA and 10 days later, mycelial fragments were transferred to CMA (Corn Meal Agar). Patogenicity test was done in 45-days-old Passiflora edulis seedlings. Sporulation in three different growth media was quantified by counting in Neubauer chamber 10 days after transferring mycelial disks to malt extract-agar 2%, PDA and CMA, in a completely randomized design as a factorial 4X3 with five replications. The isolates were incubated in Petri plates at 22 ± 3ºC and 12 hours lighting to stimulate myceliogenic growth. Characterization of morphological structures of isolates was done with minimum cultivation in Malt extract-agar 2% amended with sterilized soil + sand (1:1). Mycleial growth was determined by measuring colony diameter in PDA (Potato Dextrose Agar 39 g L-1), Malt extract Agar 2% and CMA (17 g L-1) 10 days after incubation, as a 4 x 3 factorial, with 5 replications. Five days later the color of the colonies was evaluated. Three Passiflora species and two seedling types were used to evaluate field resistance to fusariosis, in a randomized block design, as a 3X2 factorial, with three Passiflora species (Passiflora alata, P. setacea and P. edulis) and two seedling types (ungrafted or grafted with P. edulis). All isolates obtained were pathogenic to P. edulis. The best medium for conidium production was Malt extract and most sporulating isolates were LMT01 (AL) and LMT02 (GU). Isolate color varied from white to pink to violet. PDA was the the medium that least favored mycelial growth of the isolates. Only LMT02(GU) and LMT04(IN) formed macro and microconidia. Shape, dimensions and septa number of macroconidia and microconidia, as were as the presence of characteristic monophyalides allowed the classification of all isolates as Fusarium oxysporum f.sp. Passiflorae. Passiflora alata and P. setacea, used as rootstocks for P. edulis in the field, were resistant to fusariosis. Although ungrafted P. edulis does not survive in areas infested with the pathogen, its use as a rootstock promoted, similarly to P. setacea, greater growth of secondary branches 180 days after transplanting to the field.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorMestre em AgronomiaO Brasil é o maior produtor mundial de maracujá, e a podridão do colo do maracujazeiro (Passiflora edulis f. flavicarpa), causada por Fusarium spp., é um dos principais problemas da cultura no Brasil, sendo responsável pelo decréscimo da produtividade. Apesar de no Brasil, o maracujá-amarelo ser propagado predominantemente por via sexual, a utilização de porta-enxertos tolerantes à morte prematura de plantas pode ser uma forma de viabilizar o plantio de maracujazeiros em áreas com histórico da doença. O objetivo do trabalho foi caracterizar os isolados de Fusarium existentes no Triângulo Mineiro e determinar o melhor genótipo a ser utilizado para reduzir as perdas com a doença causada por Fusarium spp. Os isolados de Fusarium sp. foram coletados de plantas com sintomas de lesão vascular, em lavouras comercias de maracujá situadas em Uberlândia, Distrito de Cruzeiro dos Peixotos (Uberlândia), Indianópolis e Prata, MG. O isolamento do fungo foi realizado em BDA e após 10 dias de incubação realizou-se a repicagem em CMA (Corn Meal Agar). O teste de patogenicidade dos isolados foi realizado em mudas de Passiflora edulis aos 45 dias de idade oriundas do Viveiro Flora Brasil. A quantificação da esporulação dos isolados, em 3 diferentes meios, foi determinada através da contagem de conídios na câmara de Neubauer após 10 dias de incubação em extrato de malte 2%, BDA e CMA, em esquema fatorial 4X3 com 5 repetições. As placas de Petri foram incubadas a 22 ± 3ºC e fotoperíodo de 12 horas para crescimento miceliogênico do fungo. A caracterização das estruturas morfológicas dos isolados foi realizada em cultivo mínimo composto pelo meio de Malte a 2% com solo+areia autoclavados na proporção de 1:1. O crescimento micelial de cada isolado foi determinado pelo diâmetro micelial obtido em BDA (Batata Dextrose Agar 39 g L-1), Extrato de malte a 2% e CMA (17 g L-1) aos 10 dias de incubação em um delineamento inteiramente casualizado em arranjo fatorial 4 x 3 com 5 repetições. Cinco dias após a avaliação do crescimento micelial observou-se o aspecto visual das colônias quanto à cor. Três espécies de Passiflora e 2 tipos de mudas foram utilizadas como porta enxerto para avaliar a resistência à fusariose em delineamento de blocos casualizados com quatro repetições em esquema fatorial 3X2 sendo três espécies de Passiflora, Passiflora alata, P. setacea e P. edulis e dois tipos de mudas, pé franco e enxertadas com P. edulis. Todos isolados foram confirmados como fitopatogênicos. O melhor meio para a produção de conídios foi o Extrato de Malte e os isolados mais esporulantes foram LMT01 (AL) e LMT02 (GU). Na caracterização morfológica as colorações dos isolados nos meios de cultura estudados variaram entre branco, rosa e roxo. O BDA foi o pior meio para o crescimento micelial dos isolados apresentando menores médias para o diâmetro de colônia. Apenas LMT02(GU) e LMT04(IN) formaram macro e microconídios. Os formatos, dimensões e número de septos dos macro e microconídios, bem como as características das monofiálides permitiram classificar todos isolados como Fusarium oxysporum f.sp. Passiflorae. No campo Passiflora alata e P. setacea usados como porta enxerto para P.edulis, se mostraram mais resistentes à fusariose. Apesar de P.edulis não sobreviver como pé franco, sua utilização como porta-enxerto promoveu, da mesma forma que P.setacea, o maior crescimento dos ramos secundários aos 180 dias após transplante
Luc Angenot - One of the best experts on this subject based on the ideXlab platform.
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a hptlc densitometric determination of flavonoids from Passiflora alata p edulis p incarnata and p caerulea and comparison with hplc method
Phytochemical Analysis, 2004Co-Authors: Cintia A M Pereira, Janete H. Yariwake, Fernando Mauro Lancas, Jeannoel Wauters, Monique Tits, Luc AngenotAbstract:A high-performance thin layer chromatographic (HPTLC) method was developed in order to determine quantitatively the flavonoids in leaves of Passiflora alata, P. edulis, P. caerulea and P. incarnata. The content of orientin and isoorientin was determined, and the results were compared with those obtained using a quantitative HPLC-UV method. The latter employed rutin as standard and was developed to analyse flavonoid content from Passiflora leaves for the purpose of ensuring the quality of Passiflora phytomedicines. The results obtained using the two methods indicate that there are qualitative and quantitative differences in the flavonoids of the reference Passiflora species studied. The two methods were also employed to analyse commercial samples to illustrate their application in qualitative ('fingerprint') and quantitative determination, demonstrating their feasibility in the quality control of flavonoids from crude Passiflora drugs and phytomedicines. The HPLC conditions used are also suitable for the quantitative analysis of aqueous extracts (Passiflora infusions).
Janete H. Yariwake - One of the best experts on this subject based on the ideXlab platform.
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determinacao espectrometrica dos flavonoides das folhas de maytenus celastraceae e de Passiflora Passifloraceae e comparacao com metodo clae uv
Revista Brasileira De Farmacognosia-brazilian Journal of Pharmacognosy, 2009Co-Authors: Regina De A O Chabariberi, Alessandra C S Pozzi, Maria Luiza Zeraik, Janete H. YariwakeAbstract:This paper reports on a modification of the spectrometric procedures originally described in the French and European Pharmacopoeia for the analysis of Passiflora incarnata L. (Passifloraceae) flavonoids, proposing its application in the determination of total flavonoids from "espinheira-santa" (Maytenus aquifolium Mart. and Maytenus ilicifolia (Schrad.) Planch., Celastraceae) and "maracuja" leaves (Passiflora edulis Sims and Passiflora alata Curtis, Passifloraceae). A comparison was made of the results obtained by the spectrometric procedure with those obtained by high performance liquid chromatography (HPLC-UV), which demonstrated complete compatibility between the modified French Pharmacopoeia (spectrometric) and HPLC-UV methods.
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a hptlc densitometric determination of flavonoids from Passiflora alata p edulis p incarnata and p caerulea and comparison with hplc method
Phytochemical Analysis, 2004Co-Authors: Cintia A M Pereira, Janete H. Yariwake, Fernando Mauro Lancas, Jeannoel Wauters, Monique Tits, Luc AngenotAbstract:A high-performance thin layer chromatographic (HPTLC) method was developed in order to determine quantitatively the flavonoids in leaves of Passiflora alata, P. edulis, P. caerulea and P. incarnata. The content of orientin and isoorientin was determined, and the results were compared with those obtained using a quantitative HPLC-UV method. The latter employed rutin as standard and was developed to analyse flavonoid content from Passiflora leaves for the purpose of ensuring the quality of Passiflora phytomedicines. The results obtained using the two methods indicate that there are qualitative and quantitative differences in the flavonoids of the reference Passiflora species studied. The two methods were also employed to analyse commercial samples to illustrate their application in qualitative ('fingerprint') and quantitative determination, demonstrating their feasibility in the quality control of flavonoids from crude Passiflora drugs and phytomedicines. The HPLC conditions used are also suitable for the quantitative analysis of aqueous extracts (Passiflora infusions).
Eloir Paulo Schenkel - One of the best experts on this subject based on the ideXlab platform.
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analysis of c glycosyl flavonoids from south american Passiflora species by hplc dad and hplc ms
Phytochemical Analysis, 2012Co-Authors: Silvana Maria Zucolotto, Carize Fagundes, Flavio Henrique Reginatto, Freddy A Ramos, Leonardo Castellanos, Carmenza Duque, Eloir Paulo SchenkelAbstract:Introduction Leaves and fruits of Passiflora species are widely used around the world in popular medicine, mainly as sedatives and tranquilisers. C-glycosyl flavonoids are the main components of these species. Objective To investigate the constituent patterns and to develop a chromatographic method for the characterisation of the C-glycosyl flavonoids profile of the extracts of the leaves and the pericarp of South American Passiflora species. Methodology The chemical composition of extracts from the leaves and the fruits' pericarp of Passiflora edulis var. flavicarpa, P. edulis var. edulis, Passiflora alata, Passiflora tripartita var. mollissima, Passiflora quadrangularis, Passiflora manicata and Passiflora ligularis was evaluated for the presence of C-glycosyl flavonoids. Two separate HPLC methods were developed suitable for a diode array detector (DAD) and a MS detector. Separation by HPLC-DAD was achieved on a Luna C-18 column, using solvent A (tetrahydrofuran–isopropanol–acetonitrile) and solvent B (H3PO4 0.5%) in an isocratic elution mode. In the HPLC-MS, the components were separated on a Luna RP-18A column by a gradient elution (water–acetonitrile–formic acid). Results The presence of C-glycosyl flavonoids was identified in leaves and pericarp of P. edulis var. flavicarpa, P. alata, P. edulis var. edulis and P. tripartita var. molissima, but only in leaf extracts of P. quadrangularis and P. manicata and not at all in P. ligularis. The different species and varieties showed different major constituents. The C-glycosyl flavonoids identified more frequently were orientin, isoorientin, vitexin and isovitexin. Conclusion The methods established are simple and can be used as a tool for the characterisation and quality control of pharmaceutical preparations containing these Passiflora extracts. Copyright © 2011 John Wiley & Sons, Ltd.
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Evidence of anti-inflammatory effects of Passiflora edulis in an inflammation model
Journal of ethnopharmacology, 2006Co-Authors: Ana Beatriz Pimentel Montanher, Silvana Maria Zucolotto, Eloir Paulo Schenkel, Tânia Silvia FrödeAbstract:Abstract The popular medicine Passiflora edulis has been used as a sedative, tranquilizer, against cutaneous inflammatory diseases and intermittent fever. Most of the pharmacological investigations of Passiflora edulis have been addressed to its Central Nervous System activities, such as anxiolytic, anticonvulsant and sedative actions. Otherwise, there are few reports about the anti-inflammatory activity of the Passiflora species. The aim of this study was to investigate the mechanism of the anti-inflammatory effect of aqueous lyophilized extract obtained from leaves of Passiflora edulis var. flavicarpa Degener (Passifloraceae) in the mouse model of pleurisy induced by carrageenan (Cg), bradykinin, histamine or substance P, observing the effects upon leucocytes migration, myeloperoxidase (MPO), nitric oxide (NO) concentrations and tumor necrosis factor-alpha (TNFα) and interleukin-1 beta (IL-1β) levels. Results Passiflora edulis (250 mg/kg) administered by intraperitoneal route (i.p.) inhibited the leukocyte, neutrophils, myeloperoxidase, nitric oxide, TNFα and IL-1β levels (P Conclusion Several mechanisms, including the inhibition of pro-inflammatory cytokines (TNFα, IL-1β), enzyme (myeloperoxidase) and mediators (bradykinin, histamine, substance P, nitric oxide) release and/or action, appear to account for Passiflora edulis's actions.
Wruck D. S. M. - One of the best experts on this subject based on the ideXlab platform.
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Vegetative growth of Passiflora edulis 'brs gigante amarelo' is influenced significantly by grafting.
'International Journal of Development Research', 2021Co-Authors: Roncatto G., Botelho S. De C. C., Wruck D. S. M.Abstract:Abstract: Although Brazil is the largest producer of passion fruit, the mean fruit yield is only 13 t ha-1 and may be attributed to susceptibility to pests and diseases. An attractive solution to the problem would be to improve traits by grafting onto a rootstock presenting enhanced vegetative vigor. To this end, the commercial cultivar Passiflora edulis 'BRS Gigante Amarelo' was grafted onto rootstocks that included three native species of Passiflora and four passion fruit hybrids that are still under development. Grafts were performed with 30-day old seedlings of scion and rootstocks using the cleft graft technique, and stem diametersabove the graft and plant heights were determinedat 30, 60 and 90 days after planting (DAP). The diameters and heights of grafted plants formed on rootstocks Passiflora edulis Sims. and hybrid P. edulis 'BRS Gigante Amarelo' X [(P. quadrifaria V and erpl. XP. setacea DC.) F1 X P. incarnata L.)] were improved significantly compared with those of the control 30 and 60 DAP, although only the height increment was statistically significant at 90 DAP.The successful grafting performances of all scion-rootstock combinations can be attributed to the age of the seedlings employed and to the use of the cleft method of grafting.bitstream/item/228233/1/2021-cpamt-gr-vegetative-growth-passeflora-edulis-brs-gigante-amarelo-significantly-by-grafting.pdfId. 22371
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Identification of sources of resistance of Passiflora rootstocks to fusariosis in areas with disease outbreaks in Mato Grosso state, Brazil.
Revista Brasileira de Fruticultura v. 43 n. 4 e-160 2021., 2021Co-Authors: Wruck D. S. M., Roncatto G., Behling M., Faleiro V. De O., Bonaldo S. M., Tardin F. D.Abstract:The aim of the study was to identify sources of resistance of Passiflora rootstocks to Fusarium sp. in two experimental areas with histories of disease foci in Mato Grosso state, Brazil. The experiment was carried out from June 2012 to December 2015 and was of randomized block design with eight treatments in which susceptible cultivar P. edulis was grafted onto hybrids CPAC MJ-H-87, CPAC MJ-H-76, CPAC MJ-H-86 and CPAC MJ-H-88, the commercial cultivar and native P. edulis, P. nitida and P. alata. Mortality rates of grafted plants were evaluated up to 640 days after transplantation. All Fusarium sp. isolates were identified as F. oxysporum f. sp. Passiflorae. Plant mortality occurred earlier in the clay area than in the area with sandy clay loam. Grafted plants involving P. edulis as rootstocks were highly susceptible to Fusarium sp. with overall mortality rates above 56.25% considering both soil types, while plants with CPAC MJ-H-76 or native P. nitida rootstocks were more resistant with mortality rates below 12.5%. Grafted plants with CPAC MJ-H86 as rootstock were highly resistant in clay soil but highly susceptible in soil with high proportion of sand. Only grafted plants involving CPAC MJ-H-76 as rootstock showed moderate resistance.bitstream/item/225431/1/2021-cpamt-dsmw-identification-sources-resistance-Passiflora-rootstocks-fusariosis-areas-disease-oubreaks-mato-grosso.pd
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Enxertia hipocotiledonar em maracujazeiro-azedo.
Sinop MT: Embrapa Agrossilvipastoril 2021, 2021Co-Authors: Roncatto G., Botelho S. De C. C., Wruck D. S. M.Abstract:As doenças provocadas por patógenos do solo em maracujazeiro-azedo constituem-se em um dos principais problemas para essa cultura no Brasil, sendo que, não existe controle químico satisfatório. A susceptibilidade das cultivares a doenças do sistema radicular, como a fusariose e a podridão-do-pé causadas, respectivamente, por Fusarium oxysporum f. sp. Passiflorae e Fusarium solani, vem reduzindo a vida útil dos pomares. Essas doenças reduzem drasticamente a produtividade e a longevidade da cultura, levando a grandes prejuízos, considerando-se o alto investimento na implantação do pomar. Uma das alternativas de controle é a utilização de portaenxertos de espécies nativas resistentes (Nogueira Filho et al., 2005). Entretanto, a resistência pode ser encontrada em um acesso de uma determinada espécie e não na espécie propriamente dita. Além disso, um acesso ou uma espécie de Passiflora não vai ser completamente eficiente em todas as regiões afetadas pela fusariose no Brasil. Outro ponto importante é que a variabilidade do patógeno, a depender da região, pode influenciar nesse processo. Portanto, a recomendação do uso de um porta-enxerto para o estado de Mato Grosso vai depender da validação em condições comerciais locais.bitstream/item/222671/1/2021-cpamt-roncato-enxertia-hipocotiledonar-maracujazeiro-azedo-comunicado-tecnico-1.pd
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Identification of sources of resistance of Passiflora rootstocks to fusariosis in areas with disease outbreaks in Mato Grosso state, Brazil.
Revista Brasileira de Fruticultura v. 43 n. 4 e-160 2021., 2021Co-Authors: Wruck D. S. M., Roncatto G., Behling M., Faleiro V. De O., Bonaldo S. M., Tardin F. D.Abstract:The aim of the study was to identify sources of resistance of Passiflora rootstocks to Fusarium sp. in two experimental areas with histories of disease foci in Mato Grosso state, Brazil. The experiment was carried out from June 2012 to December 2015 and was of randomized block design with eight treatments in which susceptible cultivar P. edulis was grafted onto hybrids CPAC MJ-H-87, CPAC MJ-H-76, CPAC MJ-H-86 and CPAC MJ-H-88, the commercial cultivar and native P. edulis, P. nitida and P. alata. Mortality rates of grafted plants were evaluated up to 640 days after transplantation. All Fusarium sp. isolates were identified as F. oxysporum f. sp. Passiflorae. Plant mortality occurred earlier in the clay area than in the area with sandy clay loam. Grafted plants involving P. edulis as rootstocks were highly susceptible to Fusarium sp. with overall mortality rates above 56.25% considering both soil types, while plants with CPAC MJ-H-76 or native P. nitida rootstocks were more resistant with mortality rates below 12.5%. Grafted plants with CPAC MJ-H86 as rootstock were highly resistant in clay soil but highly susceptible in soil with high proportion of sand. Only grafted plants involving CPAC MJ-H-76 as rootstock showed moderate resistance.bitstream/item/224854/1/Identication-sources.pd
