Plant Organogenesis
Mostrando 13-24 de 58 artigos, teses e dissertações.
-
13. Glutamine and antioxidant metabolism during adventitious organogenesis of Ananas comosus leaves / Glutamina e metabolismo antioxidante durante a organogênese adventícia em folhas de Ananas comosus
A positive influence of glutamine on organogenesis of in vitro cultured plant tissues has been demonstrated by several studies. It is well known that the endogenous synthesis of phytohormones can be influenced by nitrogen sources, although it is not completely established in which way glutamine acts in this process. The addition of this amino acid to the cul
Publicado em: 2008
-
14. Morfogênese in vitro e transformação genética de citros mediada por Agrobacterium tumefaciens / Morphogenesis in vitro and Agrobacterium tumefaciens- mediated genetic transformation of citrus
Current protocols used for citrus genetic transformation have resulted in a low number of transgenic plants, furthermore, it used juvenile material which source of explants. Plants regenerated from these sources of explants have long juvenile periods for initial fruit production and are necessary many years for evaluation of the introduced characteristics of
Publicado em: 2008
-
15. Cultura de tecidos em Gerbera / Gerbera Tissue culture
Gerbera, from South Africa, belongs to Asteraceae family. They are herbaceous with flowers grouped in a head inflorescence. They are very popular and used as decorative garden plant, cut flowers and as experimental organism. São Paulo state leads the market of Brazilian ornamental flowers. Among the species produced by Brazilian companies, Gerbera is one of
Publicado em: 2008
-
16. Sinalização no ganho de competência para a conversão de meristemas apicais radiculares de Catasetum fimbriatum em gemas caulinares / Signalling events in the competence acquisition to root apical meristem conversion of Catasetum fimbriatum into buds.
Durante esse trabalho de pesquisa verificou-se que a aquisição de competência para conversão de ápices radiculares de Catasetum fimbriatum em gemas caulinares aumentava à medida que as plantas envelheciam. Esse processo esteve relacionado ao estabelecimento do crescimento determinado das raízes e com a parada da atividade e re-organização estrutural
Publicado em: 2008
-
17. Genetic transformation of Sorghum bicolor (L. Moench) aiming Al+3 tolerance / TransformaÃÃo genÃtica de Sorghum bicolor (L. Moench) visando tolerÃncia ao AlumÃnio.
The genetic transformation has been frequently associated with conventional genetic breeding programs. This technique allows the introduction of exogenous gene(s) into plant genomes, modifying specific characteristics. It can be an important supplementary tool for sorghum conventional breeding programs. However, most of the genetic transformation protocols r
Publicado em: 2007
-
18. Production, morphologic and ultra-structural analyses of Passiflora spp. callus. / ObtenÃÃo, anÃlises morfolÃgicas e ultra-estruturais de calos de Passiflora spp.
Brazil occupies a position of prominence in the passion fruit plant culture, being the largest world producer of passion fruit. In the last years, the increasing demand resulted in a expansion of the planted area resulting in the expansion and appearance of many diseases. Some species not cultivated, as Passiflora gibertii N. E. Brown and Passiflora edulis e
Publicado em: 2007
-
19. Factor evaluations associated to in vitro regeneration of five cultivars of cassava / Avaliação de fatores associados à regeneração in vitro e transformação genético de cinco cultivares de mandioca
Cassava (Manihot esculenta Crantz) is one of the most important crops for human consumption. It is considered the fourth most important source of carbohydrates in the tropics. The increasing importance of the culture achieved during the last years, raised the interest in the improvement and development of new cassava varieties. Therefore, the aims of the pre
Publicado em: 2007
-
20. Otimização do cultivo in vitro visando a transformação genética das cultivares brasileiras de alho (Allium sativum L.) / Optimization of in vitro culture aiming at genetic transformation of Brazilian garlic (Allium sativum L.) cultivars
Garlic (Allium sativum L.) breeding has been limited to clonal selection of mutant genotypes, since almost all the species germplasm is sterile, not flowering under standard culture conditions. Garlic sterility affects not only breeding but also directly influences production costs. Further, the requirement of vegetative propagation using small bulbs as prop
Publicado em: 2007
-
21. Técnicas de cultivo in vitro e microenxertia ex vitro visando a eliminação do Cowpea Aphid-Borne Mosaic virus em Maracujazeiro-Azedo
The sour passion fruit plant (Passiflora edulis Sims f. flavicarpa Deg.) is one of the most important Brazilian fruitbearings and its cultivation presents good perspectives of expansion. The culture development has been made more difficult by diseases, specially the fruit hardening disease, caused by the Cowpea aphid-borne mosaic virus (CABMV). The virus eli
Publicado em: 2006
-
22. TISSUE CULTURE AND b-ECDYSONE PRODUCTION OF Pfaffia glomerata AND Pfaffia tuberosa (AMARANTHACEAE) / CULTURA DE TECIDOS E PRODUÇÃO DE b-ECDISONA EM Pfaffia glomerata E Pfaffia tuberosa (AMARANTHACEAE)
Many biotechnological techniques have been formed by new tools to the study of medicinal plants and for the production of homogenous and productive biomass. This work aimed to examine aspects of morphogenesis and callogenesis in Pfaffia glomerata and Pfaffia tuberosa as well as to evaluate the production of -ecdysone in micropropagated plants, clones and cal
Publicado em: 2006
-
23. In vitro organogenesis and genetic transformation of Citrus sp. with the coat protein gene and an antisense untranslated region of the Citrus tristeza virus / Organogênese in vitro e transformação genética em Citrus sp. com o gene da capa protéica e uma seqüência conservada antisense do vírus da tristeza dos citros
O presente trabalho teve como principal objetivo obter plantas transgênicas, dos cultivares porta-enxerto limão Cravoe laranja azeda e de cultivares copa de laranja doce, expressando genes que possam influenciar no nível de resistência ao vírus da tristeza dos citros (CTV) e, possivelmente à morte súbita dos citros. Buscou-se ainda estudar a organogê
Publicado em: 2006
-
24. Somaclonal variation in Asparagus officinalis plants regenerated by organogenesis from long-term callus cultures
Somaclonal variation in plants regenerated by organogenesis from long-term cultured calluses of two diploid staminate genotypes of Asparagus officinalis cv. Argenteuil was characterized by plant phenotype, ploidy, meiotic behavior, pollen viability, fruit and seed set, and AFLP profiles. Phenotypic deviations from the donors were detected in foliage color, f
Genetics and Molecular Biology. Publicado em: 2005-09