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| Andrade,Camila Cristina Lage de; Vicentin,Rayssa Pereira; Costa,Josineide Rodrigues; Perina,Fabiano José; Resende,Mario Lúcio Vilela de; Alves,Eduardo. |
| ABSTRACT: Brown eye spot (BE) caused by Cercospora coffeicola is the main disease of coffee crop. A variation in symptoms of BE has been reported in the field, raising suspicion of occurrence of new species. However, information about coffee- C. coffeicola interaction is still limited. This research aimed to determine the difference between antioxidant metabolism of coffee plants cultivar Mundo Novo inoculated with a strain isolated from a common BE lesion (CML 2984) and a strain isolated from a black BE lesion (CML 2985). The enzyme activity of peroxidase (POX), catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX) and phenylalanine ammonia lyase (PAL) were determined. Activities of POX, APX, and PAL increased in plants inoculated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica L.; "common" brown eye spot; "black" brown eye spot; Reactive oxygen species.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001764 |
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| Lucas,Gilvaine Ciavareli; Alves,Eduardo; Pereira,Ricardo Borges; Perina,Fabiano José; Souza,Ricardo Magela de. |
| The objective of this work was to evaluate the effects of plant essential oils (EOs) on the growth of Xanthomonas vesicatoria, on bacterial morphology and ultrastructure, and on the severity of tomato bacterial spot. EOs from citronella, clove, cinnamon, lemongrass, eucalyptus, thyme, and tea tree were evaluated in vitro at concentrations of 0.1, 1.0, 10, and 100% in 1.0% powdered milk. The effect of EOs, at 0.1%, on the severity of tomato bacterial spot was evaluated in tomato seedlings under greenhouse conditions. The effects of citronella, lemongrass, clove, and tea tree EOs, at 0.1%, on X. vesicatoria cells were evaluated by transmission electron microscopy. All EOs showed direct toxic effect on the bacteria at a 10%-concentration in vitro. Under... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative control of plant disease; Cell ultrastructure; Pathogenic bacteria. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300006 |
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| Nakada,Pâmela Gomes; Oliveira,João Almir; Melo,Larissa Correia de; Silva,Adriano Alves da; Silva,Priscila Alves da; Perina,Fabiano José. |
| A secagem de sementes de pepino é etapa obrigatória no seu beneficiamento, bem como o armazenamento para conquistar mercados competitivos e melhores oportunidades de preços. Portanto, o objetivo com este trabalho foi o de avaliar o desempenho fisiológico e bioquímico durante a secagem e armazenamento de sementes de pepino. A cultivar utilizada foi o híbrido de pepino Ômega comercializado pela Agristar Ltda. As sementes foram lavadas e secadas em temperatura ambiente de 25 ºC, 35 ºC e 45 ºC até atingir grau de umidade de 7%. As sementes foram embaladas em sacos de papel multifoliado e armazenadas em condições de ambiente não controlado. As avaliações da qualidade foram realizadas aos 0, 3, 6, 9 e 12 meses pelos testes de germinação, primeira contagem,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus; Qualidade fisiológica; Eletroforese. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000300005 |
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| Pereira,Ricardo Borges; Lucas,Gilvaine Ciavareli; Perina,Fabiano José; Alves,Eduardo. |
| Rust is considered the most important disease in coffee because it causes severe defoliation in plants and, consequently, reduction in productivity. This study evaluated the in vitro effect of essential oils of cinnamon, citronella, lemongrass, clove, tea tree, thyme, neem and eucalyptus on the germination of urediniospores of Hemileia vastatrix; the effectiveness of these oils to control rust on seedlings of coffee cultivars Catucaí 2SL, Catuaí IAC 62 and Mundo Novo 379/19 in the greenhouse; and the effect of more promising oils on urediniospores of H. vastatrix by transmission electron microscopy (TEM). All the essential oils inhibited the germination of urediniospores with increasing concentrations. All oils promoted partial control of the disease in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hemileia vastatrix; Alternative control; Transmission electron microscopy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000100002 |
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| Teixeira,Glauco Antonio; Alves,Eduardo; Amaral,Douglas Carvalho; Machado,José da Cruz; Perina,Fabiano José. |
| Stem and ear rot caused by Stenocarpella maydis are responsible for severe losses in maize production. Treatment of seeds with fungicides may induce environmental damage. Hence, this study aimed to evaluate the effects of essential oils extracted from Cymbopogon winterianus, Thymus vulgaris, Cymbopogon citratus, Corymbia citriodora, Cinnamomum zeylanicum, and Syzygium aromaticum on the development of in vitro S. maydis. In addition, maize seeds were treated with these essential oils to determine their possible mode of action and effects. The oils from S. aromaticum, C. zeylanicum, and T. vulgaris inhibited fungal development at concentrations higher than 0.025%. The oils from S. aromaticum and C. zeylanicum showed seed germination rates of 89.0% and 84.5%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stenocarpella maydis; Zea mays; Alternative control; Electron microscopy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001100004 |
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| Pereira,Ricardo Borges; Lucas,Gilvaine Ciavareli; Perina,Fabiano José; Resende,Mário Lúcio Vilela de; Alves,Eduardo. |
| The objectives of this work were to assess the in vitro effect of essential oils extracted from cinnamon, citronella, lemon grass, India clove, tea tree, thyme, neem and eucalyptus on the conidia germination and on mycelial growth of Cercospora coffeicola, and their efficacy to control the brown eye spot in coffee seedlings (cultivars Catucaí 2SL, Catuaí IAC 62 and Mundo Novo 379/19) in a greenhouse, as well as their effects on the initial germination and infection events by scanning electron microscopy. All essential oils promoted the inhibition of conidia germination with increasing concentrations. India clove, cinnamon, neem, thyme and lemon grass oils inhibited the mycelial growth of C. coffeicola. The cinnamon and citronella oils were the most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Cercospora coffeicola; Alternative control. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000100014 |
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