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| Registros recuperados: 241 | |
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| Martini,Maria Helena; Figueira,Antonio; Lenci,Camila Gonçalves; Tavares,Débora de Queiroz. |
| The amount of cotyledon polyphenolic cells varies extensively within the Theobroma species. The polyphenolic compounds of these cells play a protective role and furthermore have an important function in the development of chocolate flavour. The morphology of the polyphenolic cells of the mesophyll is described and the development of these idioblasts in Theobroma cacao L., T. subincanum Mart., T. obovatum Klotzsch ex Bernoulli, T. grandiflorum (Willd. ex Spreng.) K. Schum., T. microcarpum Mart., T. bicolor Bonpl. and T. speciosum Willd. ex Spreng analysed. The total polyphenolic content in the seeds as determined by spectrophotometry showed a variation of about forty times. The alive, transparent polyphenolic cells are scattered throughout the cotiledonary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cotyledon mesophyll cells; Polyphenolic cells development; Seed; Theobroma. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000300006 |
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| Medina, Edison Cardona; Santos, Marisa; Nodari, Rubens Onofre. |
| Escobedia grandiflora (L.f.) Kuntze is a wild hemiparasitic plant with orange roots. Little is known about the development of initial parasitism with the host, despite the significant value of roots for Central and South American communities. Therefore, this study aimed to characterize post-seminal structure and development of E. grandiflora in Pennisetum purpureum host. To analyze the structure and development of E. grandiflora, seedlings, stems and roots samples were processed and examined under light, confocal and scanning electron microscopy. Escobedia grandiflora seeds are composed of seed coat, perisperm, and embryo. Emergence of the radicle began eleven days after imbibition. Seedlings showed a root hair collar encircling the axis at the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parasitism; Seed; Seedling survival; Orange roots; Haustorium.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46667 |
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| Dias-Filho,Moacyr B.. |
| The potential for seed bank formation of two perennial weed species, Ipomoea asarifolia (Desr.) Roem. & Schult. (Convolvulaceae) and Stachytarpheta cayennensis (Rich.) M. Vahl (Verbenaceae), both common in Amazonia , was evaluated in a degraded pasture area in eastern Brazilian Amazonia . Seeds were enclosed in nylon mesh packets and placed at the soil surface or buried at 5 or 10 cm deep. The number of viable seeds was recorded at 6, 10, 14 and 18 months after burial. Results showed that S. cayennensis has the ability to form persistent soil seed bank, while I. asarifolia seeds do not build up in the soil seed bank. For S. cayennensis and, to some extent, for I. asarifolia, seed survival was highest at greater burial depths. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Seed; Longevity; Stachytarpheta cayennensis; Ipomoea asarifolia. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581999000200002 |
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| LOPES FILHO, F.; COELHO, M. B.; FERREIRA, J. C.. |
| Este trabalho foi conduzido em um solo classificado como oxissolo do Campo Experimental de Bebedouro/EMBRAPA, Petrolina, PE., com o objetivo de comparar a eficiencia dos metodos de irrigacao por sulco e gotejo na producao de sementes de melao (Cucumis melo L.). Para o metodo de gotejo foram estudadas duas frequencias de irrigacao (2 e 5 dias) e tres laminas com base na evaporacao do tanque Classe A (0,50;0,75 e 1,00). No metodo de sulco, somente tres frequencias de irrigacao foram usadas (5, 8 e 10 dias). O delineamento usado foi o de blocos ao acaso com nove tratamentos e quatro repeticoes. De acordo com os resultados obtidos, constatou-se que as melhores producoes de sementes foram alcancadas, quando foi usado o metodo de gotejo com as frequencias de 2 e... |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Irrigacao por gotejo; Oxissolo; Seed; Trickle irrigation; Soils; Melon.; Melão; Cucumis Melo; Semente.; Melons. |
| Ano: 1977 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133801 |
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| Registros recuperados: 241 | |
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