Raios gama na sobrevivência de plantas de maracujazeiro amarelo inoculadas com Fusarium oxysporum f sp. passiflorae

Flores, Patrícia Silva; Bruckner, Cláudio Horst

doi:10.1590/s0103-84782014000400011

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…Selective agents are frequently used in culture media to offer selection pressure in vitro in somaclonal plants in order to hasten the sorting out of plants that were submitted to mutation for desired traits ( Jain, 2010 ; Flores e Bruckner, 2014 ). An example of a chemical agent used in tests, which confer resistance to diseases, is fusaric acid, an unspecific toxin produced by many species of fungi from the genus Fusarium .…”

Section: Introductionmentioning

confidence: 99%

Pre-selection of banana somaclones resistant to Fusarium oxysporum f. sp. cubense, subtropical race 4

et al. 2021

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– Fusarium wilt, caused by Fusarium oxysporum f. sp. cubense (Foc), is one of the most destructive diseases affecting banana crops worldwide. Therefore, the development of resistant cultivars is a promising alternative to mitigate the effects of the disease on banana plantations. The objectives of this study were to induce somaclonal variation in banana cultivars of the Silk and Cavendish types and to select somaclones resistant to subtropical race 4, thereby enabling the production of fruit in areas where this race is present. Shoot clump apexes of the Grand Naine and Maçã (Silk) cultivars were grown in MS medium. The cultures were subcultured four times. They were then challenged with fusaric acid (FA) in an experiment consisting of four treatments with different concentrations (0.1, 0.2, 0.3, and 0.4 mM) and five repetitions, each consisting of a Petri dish containing seven multiple shoot clumps in MS culture medium supplemented with 2.5 mg/L benzylamine purine. Multiple shoot clumps without the addition of FA were also used in the experiment, and were subcultured three times and maintained in a dark room. The multiple shoot clumps that survived the treatment with FA were transferred to MS medium and maintained in the growth chamber in the presence of light. The regenerated plants were later planted in tanks containing soil infested with an isolate classified as Foc subtropical race 4 (Foc STR4), and were evaluated for resistance to the pathogen at 90 days after inoculation (d.a.i.). Pathogen structures were confirmed by root clarification and root staining technique. All somaclones of the Maçã (Silk) cultivar were susceptible to Fusarium wilt and two somaclones of the Grand Naine cultivar were selected as resistant. The addition of FA as a selective agent was effective in the selection of somaclones among plants of the Grand Naine cultivar, as shown by the selection of two somaclones resistant to Foc STR4. The next step will consist of the agronomic and market potential validation of the selected somaclones, aiming to confirm their potential use by producers.

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Section: Introductionmentioning

confidence: 99%

Pre-selection of banana somaclones resistant to Fusarium oxysporum f. sp. cubense, subtropical race 4

et al. 2021

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pH range and substrate organic matter levels modulate the sporulation of Fusarium oxysporum f. sp. passiflorae under controlled conditions

Pires,

de Jesus,

Lima

et al. 2024

Eur J Plant Pathol

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Seleção precoce de espécies de Passiflora resistente a fusariose

et al. 2017

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O maracujazeiro azedo é uma importante fruteira amplamente produzida e consumida no Brasil. A produção e produtividade estão ameaçadas por vários problemas fitossanitários. Uns dos mais importantes é a fusariose, causada pelo fungo Fusarium oxysporum f. sp. passiflorae. Esta doença não tem controle eficiente. Neste sentido o objetivo deste trabalho foi avaliar a resposta de plantas, em estágio de muda, de 14 espécies de Passiflora mediante a inoculação de F. oxysporum f. sp. passiflorae cultivadas em solução nutritiva. As espécies utilizadas no Screening foram: P. quadrangularis, P. nitida, P. foetida, P. tenuifila, P. alata, P. setacea, P. cincinnata, P. mucronata, P. micropetala, P. suberosa Passion fruit is an important fruit vine widely produced and consumed in Brazil. Production and productivity have been threatened by several phytosanitary problems. One of the most important problems is fusariosis, caused by the fungus Fusarium oxysporum f. sp. passiflorae. This disease has no efficient control. Thus, the aim of this study was to evaluate the response of plants of 14 Passiflora species, in the stage of seedling, through inoculation of F. oxysporum f. sp. passiflorae grown in nutritive solution. The species used in the screening were P. quadrangularis, P. nitida, P. foetida, P. tenuifila, P. alata, P. setacea, P. cincinnata, P. mucronata, P. micropetala, P. suberosa, P. morifolia Preisigke, S.C.; Silva, L.P.; Serafim, M.E.; Bruckner, C.H.; Araújo, K.L.; Neves, L.G. Early selection of Passiflora species resistant to fusariosis. Summa Phytopathologica, v.43, n.4, p.321-325, 2017.P. eichleriana P. edulis and P. coccinea. Four seedlings of each genotype were inoculated by immersion of roots in a suspension of 1x10 6 spores mL -1 during 24 hours and then transplanted into pots containing nutritive solution. Plants were daily evaluated during 40 days for the occurrence of wilt symptoms and death. The survival period and the mortality rate were obtained. The method of root immersion for 24 hours and the replacement of soil by nutritive solution were efficient in distinguishing the resistant genotypes. There was intraspecific variability in relation to the disease. The most resistant species were P. foetida, P. mucronata, P. nitida and P. morifolia.O maracujazeiro azedo (Passiflora edulis Sims) é a espécie mais conhecida e estudada dentro do gênero Passiflora. O Brasil, desde a década de 70, vem se destacando como maior consumidor e produtor mundial desta fruteira. Porém, problemas fitossanitários ameaçam o setor produtivo dessa cultura. As doenças causadas por patógenos de solo são as mais preocupantes pois não tem nenhuma forma de controle eficiente. Dentre essas doenças, destaca-se a fusariose ou murcha de Fusarium causada pelo fungo Fusarium oxysporum f. sp. passiflorae (15).O fungo F. oxysporum f. sp. passiflorae coloniza os vasos das plantas através de pequenos ferimentos ou aberturas naturais nas raízes, obstruindo os vasos causando murcha e consequentemente a morte da planta. É uma doença que provoca g...

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Raios gama na sobrevivência de plantas de maracujazeiro amarelo inoculadas com Fusarium oxysporum f sp. passiflorae

Cited by 3 publications

References 17 publications

Pre-selection of banana somaclones resistant to Fusarium oxysporum f. sp. cubense, subtropical race 4

Pre-selection of banana somaclones resistant to Fusarium oxysporum f. sp. cubense, subtropical race 4

pH range and substrate organic matter levels modulate the sporulation of Fusarium oxysporum f. sp. passiflorae under controlled conditions

Seleção precoce de espécies de Passiflora resistente a fusariose

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