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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
11/07/2011 |
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Data da última atualização: |
23/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MARQUES, F. A.; ZALESKI, S. R. M.; LAZZARI, S. M. N.; FRENSCH, G.; SENHORINI, G. A.; TRÖGER, A.; FRANCKE, W.; IEDE, E. T.; MORI, K. |
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Afiliação: |
FRANCISCO A. MARQUES, UFPR; SHEILA R. M. ZALESKI, UFPR; SONIA MARIA N. LAZZARI, UFPR; GUSTAVO FRENSCH, UFPR; GRECE A. SENHORINI, UFPR; ARMIN TRÖGER, University of Hamburg; WITKO FRANCKE, University of Hamburg; EDSON TADEU IEDE, CNPF; KENJI MORI, PHOTOSENSITIVE MATERIALS RESEARCH CENTER. |
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Título: |
Identification of (1R, 2S)-Grandisal and (1R, 2S)-Grandisol in Pissodes castaneus male-produced volatiles: evidence of a sex pheromone. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 22, n.6, p. 1050-1055, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
The banded pine weevil, Pissodes castaneus (De Geer, 1775) (Coleoptera, Curculionidae) is a forest pest recorded in Brazil since 2001, which is already distributed in the three states of the Southern Region, causing great concern to the forestry sector. Objectives of our study were to isolate, identify, and assess the behavioral activity of male-produced volatiles of P. castaneus. Our results indicate that communication between conspecifics of P. castaneus is mediated by pheromones, as verified by the significant attraction of females to male-produced volatiles. Behavioral tests performed with the insects and the host plant, Pinus taeda, showed that male-produced compounds may act as sex pheromones and that the compounds released by the host plant did not enhance the activity of the male-produced volatiles. The chemical structures of the male specific volatile compounds produced by P. castaneus were determined to be (1R, 2S)-grandisal and (1R, 2S)- grandisol in an enantiomeric excess exceeding 95%. |
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Palavras-Chave: |
Feromona sexual; Gorgulho-da-casca-do-pinus. |
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Thesaurus Nal: |
Coleoptera; Curculionidae; Pissodes castaneus. |
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Categoria do assunto: |
-- |
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Marc: |
null
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Registro original: |
Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
06/06/2013 |
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Data da última atualização: |
18/10/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MONDO, V. H. V.; CICERO, S. M.; DOURADO-NETO, D.; PUPIM, T. L.; DIAS, M. A. N. |
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Afiliação: |
VITOR HENRIQUE VAZ MONDO, CNPAF; SILVIO MOURE CICERO, ESALQ; DURVAL DOURADO-NETO, ESALQ; TULIO LOURENÇO PUPIM, ESALQ; MARCOS ALTOMANI NEVES, ESALQ. |
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Título: |
Effect of seed vigor on intraspecific competition and grain yield in maize. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Agronomy Journal, Madison, v. 105, n. 1, p. 222-228, 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
High-vigor seeds result in faster emergence of seedlings and crop establishment than low-vigor seeds. Th ese characteristics could enhance plant competitive ability and could have direct eff ects on maize (Zea mays L.) grain yield. Th is study examined the hypothesis that seed vigor heterogeneity in maize seed lots could increase intraspecifi c competition and negatively aff ect crop grain yield. A 2-yr experiment was executed combining two hybrid maize seed lots, possessing high-vigor and low-vigor seeds, in seven diff erent distributions in the sowing row. Th e distributions of the plants originating from high- and low-vigor seeds were evaluated at harvest for dry mass accumulation, prolifi cacy, number of grains per row, number of rows per ear, 1000-grain mass, and grain yield. A replacement series design for data analysis of two homogeneous populations and fi ve seed mixture populations was applied. We concluded that, in plant populations originating from heterogeneous seed lots, intraspecifi c competition was intensifi ed, resulting in losses of dry mass accumulation and grain yield. Plants originating from low-vigor seeds had less competitive ability and reduced plant dry mass accumulation and grain yield than those originating from high-vigor seeds and were responsible for crop yield losses. Plants originating from high-vigor seeds had a dominant eff ect on those originating from low-vigor seeds and had no compensatory eff ects. Th e major production component aff ected by intraspecifi c competition was the number of grains per row. MenosHigh-vigor seeds result in faster emergence of seedlings and crop establishment than low-vigor seeds. Th ese characteristics could enhance plant competitive ability and could have direct eff ects on maize (Zea mays L.) grain yield. Th is study examined the hypothesis that seed vigor heterogeneity in maize seed lots could increase intraspecifi c competition and negatively aff ect crop grain yield. A 2-yr experiment was executed combining two hybrid maize seed lots, possessing high-vigor and low-vigor seeds, in seven diff erent distributions in the sowing row. Th e distributions of the plants originating from high- and low-vigor seeds were evaluated at harvest for dry mass accumulation, prolifi cacy, number of grains per row, number of rows per ear, 1000-grain mass, and grain yield. A replacement series design for data analysis of two homogeneous populations and fi ve seed mixture populations was applied. We concluded that, in plant populations originating from heterogeneous seed lots, intraspecifi c competition was intensifi ed, resulting in losses of dry mass accumulation and grain yield. Plants originating from low-vigor seeds had less competitive ability and reduced plant dry mass accumulation and grain yield than those originating from high-vigor seeds and were responsible for crop yield losses. Plants originating from high-vigor seeds had a dominant eff ect on those originating from low-vigor seeds and had no compensatory eff ects. Th e major production component aff ect... Mostrar Tudo |
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Palavras-Chave: |
Competencia intraespecífica. |
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Thesagro: |
Erva daninha; Milho; Semente; Zea mays. |
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Thesaurus NAL: |
Corn; Intraspecific competition. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
null
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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