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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
27/06/2007 |
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Data da última atualização: |
17/07/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SKORUPA, L. A.; PIRANI, J. R. |
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Afiliação: |
LADISLAU ARAUJO SKORUPA, CNPMA; JOSE RUBENS PIRANI, USP/SP. |
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Título: |
A new species of Pilocarpus (Rutaceae) from northern Brazil. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Brittonia, New York, v. 56, n. 2, p. 147-150, abr./jun. 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
Pilocarpus is a neotropical genus of Rutaceae, tribe Galipeae, subtribe Pilocarpinae. Its range extends from southern Mexico to southern South America. In a taxonomic revision of Pilocarpus, Skorupa (1996) recognized 16 species, including four new ones - three from Brazil (Skorupa 1998) and one from Peru (Skorupa 1999). Recently, we received some specimens of a Pilocarpus from northern Brazil that has mainly trifoliolate leaves and that is here described as new. A new species, Pilocarpus trifoliolatus Skorupa & Pirani from Pará, Brazil, is described and illustrated. The new species resembles P. microphyllus Stapf ex Wardleworth and P. alatus C.J. Joseph ex Skorupa by its winged rachis and petiole and by its dilated stigma. |
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Palavras-Chave: |
Norte do Brasil; Planta tropical; Taxonomia de plantas. |
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Thesagro: |
Botânica; Identificação. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01291naa a2200193 a 4500
001 1015504
005 2017-07-17
008 2004 bl uuuu u00u1 u #d
100 1 $aSKORUPA, L. A.
245 $aA new species of Pilocarpus (Rutaceae) from northern Brazil.$h[electronic resource]
260 $c2004
520 $aPilocarpus is a neotropical genus of Rutaceae, tribe Galipeae, subtribe Pilocarpinae. Its range extends from southern Mexico to southern South America. In a taxonomic revision of Pilocarpus, Skorupa (1996) recognized 16 species, including four new ones - three from Brazil (Skorupa 1998) and one from Peru (Skorupa 1999). Recently, we received some specimens of a Pilocarpus from northern Brazil that has mainly trifoliolate leaves and that is here described as new. A new species, Pilocarpus trifoliolatus Skorupa & Pirani from Pará, Brazil, is described and illustrated. The new species resembles P. microphyllus Stapf ex Wardleworth and P. alatus C.J. Joseph ex Skorupa by its winged rachis and petiole and by its dilated stigma.
650 $aBotânica
650 $aIdentificação
653 $aNorte do Brasil
653 $aPlanta tropical
653 $aTaxonomia de plantas
700 1 $aPIRANI, J. R.
773 $tBrittonia, New York$gv. 56, n. 2, p. 147-150, abr./jun. 2004.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
12/01/1994 |
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Data da última atualização: |
19/10/2023 |
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Autoria: |
ANDRADE, R. V. de. |
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Afiliação: |
RAMIRO VILELA DE ANDRADE, EMBRAPA-CNPMS. |
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Título: |
Evaluation of firm seed in Pensacola bahiagrass (Paspalum notatum Flugge) and browntop millet (Panicum ramosum L.). |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
1977. |
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Páginas: |
43 f. |
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Idioma: |
Inglês |
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Notas: |
Dissertação (Mestrado) - Mississippi State University, Mississippi State. |
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Conteúdo: |
Seeds of Pensacola bahiagrass, (Paspalum notatum Flugge) and browntop millet (Panicum ramosum L.) are dormant after harvest and dormancy often persist for several months, or in some cases for a few years. The dormancy of these grasses is characterized by gaseous impermeability and recognized as firm seed. The general objectives of this study were: (1) to determine the effectiveness and convenience of acid scarification for overcomirg seed dormancy in Pensacola bahiagrass and browntop millet, and (2) to evaluate the planting value of firm seed in these crops. The experiment was conducted in both the laboratory and the field. Ten lots each of bahiagrass and browntop millet seed were evaluated by the standard germination test and by a 20-minute acid scarification treatment. Bahiagrass seed lots showed an average increase of 17.4% in germination in the laboratory after acid scarification. However, non-treated seed germinated, on the average, higher than acid-scarified seed 38 days after planting. A 20-minute acid scarification treatment almost overcame dormancy in bahiagrass. At the end of the 28-day germination test period, firm seeds were subjected to the tetrazolium test. Results showed that not all seeds were viable. Total viability of the seeds was not affected by the acid scarification treatment but the number of abnormal seedlings increased. The acid scarification method shortened the time required for germination by about nine days. The 20-minute sulfuric acid treatment in browntop millet gave no improvement in the germination percentage. Browntop millet seeds, when treated with sulfuric acid, were more susceptible to fungal attack and as a consequence, there was an increase in the number of abnormal seedlings. The number of abnormal seedlings and degree of fungal attack were closely related to the time of sulfuric acid treatment; as the time increased, abnormality increased. Based on the results of this study, there appears to be no immediate planting value in the firm seeds of Pensacola bahiagrass or browntop millet. MenosSeeds of Pensacola bahiagrass, (Paspalum notatum Flugge) and browntop millet (Panicum ramosum L.) are dormant after harvest and dormancy often persist for several months, or in some cases for a few years. The dormancy of these grasses is characterized by gaseous impermeability and recognized as firm seed. The general objectives of this study were: (1) to determine the effectiveness and convenience of acid scarification for overcomirg seed dormancy in Pensacola bahiagrass and browntop millet, and (2) to evaluate the planting value of firm seed in these crops. The experiment was conducted in both the laboratory and the field. Ten lots each of bahiagrass and browntop millet seed were evaluated by the standard germination test and by a 20-minute acid scarification treatment. Bahiagrass seed lots showed an average increase of 17.4% in germination in the laboratory after acid scarification. However, non-treated seed germinated, on the average, higher than acid-scarified seed 38 days after planting. A 20-minute acid scarification treatment almost overcame dormancy in bahiagrass. At the end of the 28-day germination test period, firm seeds were subjected to the tetrazolium test. Results showed that not all seeds were viable. Total viability of the seeds was not affected by the acid scarification treatment but the number of abnormal seedlings increased. The acid scarification method shortened the time required for germination by about nine days. The 20-minute sulfuric acid treatment ... Mostrar Tudo |
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Palavras-Chave: |
Forage graminea; Forage grass; Panicum ramosum; Paspalum matatum; Quebra; Sementes; Sulphuric acid. |
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Thesagro: |
Ácido Sulfúrico; Dormência; Grama Batatais; Gramínea Forrageira; Milheto; Paspalum Notatum; Semente. |
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Thesaurus NAL: |
dormancy; seeds. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/89884/1/Ramiro-Andrade.pdf
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Marc: |
LEADER 02967nam a2200325 a 4500
001 1489258
005 2023-10-19
008 1977 bl uuuu m 00u1 u #d
100 1 $aANDRADE, R. V. de
245 $aEvaluation of firm seed in Pensacola bahiagrass (Paspalum notatum Flugge) and browntop millet (Panicum ramosum L.).
260 $a1977.$c1977
300 $a43 f.
500 $aDissertação (Mestrado) - Mississippi State University, Mississippi State.
520 $aSeeds of Pensacola bahiagrass, (Paspalum notatum Flugge) and browntop millet (Panicum ramosum L.) are dormant after harvest and dormancy often persist for several months, or in some cases for a few years. The dormancy of these grasses is characterized by gaseous impermeability and recognized as firm seed. The general objectives of this study were: (1) to determine the effectiveness and convenience of acid scarification for overcomirg seed dormancy in Pensacola bahiagrass and browntop millet, and (2) to evaluate the planting value of firm seed in these crops. The experiment was conducted in both the laboratory and the field. Ten lots each of bahiagrass and browntop millet seed were evaluated by the standard germination test and by a 20-minute acid scarification treatment. Bahiagrass seed lots showed an average increase of 17.4% in germination in the laboratory after acid scarification. However, non-treated seed germinated, on the average, higher than acid-scarified seed 38 days after planting. A 20-minute acid scarification treatment almost overcame dormancy in bahiagrass. At the end of the 28-day germination test period, firm seeds were subjected to the tetrazolium test. Results showed that not all seeds were viable. Total viability of the seeds was not affected by the acid scarification treatment but the number of abnormal seedlings increased. The acid scarification method shortened the time required for germination by about nine days. The 20-minute sulfuric acid treatment in browntop millet gave no improvement in the germination percentage. Browntop millet seeds, when treated with sulfuric acid, were more susceptible to fungal attack and as a consequence, there was an increase in the number of abnormal seedlings. The number of abnormal seedlings and degree of fungal attack were closely related to the time of sulfuric acid treatment; as the time increased, abnormality increased. Based on the results of this study, there appears to be no immediate planting value in the firm seeds of Pensacola bahiagrass or browntop millet.
650 $adormancy
650 $aseeds
650 $aÁcido Sulfúrico
650 $aDormência
650 $aGrama Batatais
650 $aGramínea Forrageira
650 $aMilheto
650 $aPaspalum Notatum
650 $aSemente
653 $aForage graminea
653 $aForage grass
653 $aPanicum ramosum
653 $aPaspalum matatum
653 $aQuebra
653 $aSementes
653 $aSulphuric acid
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