Plant regeneration from cotyledonary explants of Eucalyptus camaldulensis dehn and histological study of organogenesis in vitro



Document title: Plant regeneration from cotyledonary explants of Eucalyptus camaldulensis dehn and histological study of organogenesis in vitro
Journal: Brazilian archives of biology and technology
Database: PERIÓDICA
System number: 000330048
ISSN: 1516-8913
Authors: 1
2
1
1
Institutions: 1Universidade Federal do Parana, Departamento de Botanica, Curitiba, Parana. Brasil
2Empresa Brasileira de Pesquisa Agropecuaria, Centro de Pesquisa Agroflorestal da Amazonia Ocidental, Manaus, Amazonas. Brasil
Year:
Season: Mar-Abr
Volumen: 53
Number: 2
Pages: 311-318
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract The present work aimed at regenerating plants of Eucalyptus camaldulensis from the cotyledonary explants and describing the anatomy of the tissues during callogenesis and organogenesis processes, in order to determine the origin of the buds. The cotyledonary leaves of E. camaldulensis were cultured in Murashige and Skoog (MS), WPM and JADS media supplemented with 2.7 µM NAA and 4.44 µM BAP. The best results for bud regeneration were obtained on MS and WPM media (57.5 and 55% of calluses formed buds, respectively). Shoot elongation and rooting (80%) were obtained on MS/2 medium (with half-strength salt concentration) with 0.2% activated charcoal. Acclimatization was performed in the growth chamber for 48 h and then the plants were transferred to a soil:vermiculite mixture and cultured in a greenhouse. Histological studies revealed that the callogenesis initiated in palisade parenchyma cells and that the adventitious buds were formed from the calluses, indicating indirect organogenesis
Portuguese abstract Este trabalho teve como objetivo a obtenção de plantas de Eucalyptus camaldulensis a partir de folhas cotiledonares e o estudo da anatomia dos tecidos durante a calogênese e organogênese para determinar a origem das gemas. Folhas cotiledonares foram cultivadas em meios de cultura MS, WPM e JADS suplementados com 2,7 µM de ANA e 4,44 µM de BAP. Os melhores resultados para a regeneração de gemas foram obtidos com os meios MS e WPM. Para o alongamento e enraizamento, o meio de cultura MS/2 contendo 0,2% de carvão ativado apresentou-se eficiente para ambas as etapas. A aclimatização foi realizada mediante a abertura dos frascos na sala de crescimento por 48 horas, seguido da transferência para casa-de-vegetação com nebulização intermitente. Estudos histológicos foram conduzidos e revelaram que a calogênese teve início nas células do parênquima paliçádico e que as gemas adventícias formaram-se a partir dos calos, indicando a organogênese indireta
Disciplines: Biología
Keyword: Fisiología vegetal,
Cultivo de tejidos,
Propagación vegetativa,
Brotes adventicios,
Organogénesis,
Eucalyptus camaldulensis
Keyword: Biology,
Plant physiology,
Tissue culture,
Vegetative propagation,
Adventitious shoots,
Organogenesis,
Eucalyptus camaldulensis
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