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Ciência Florestal
Centro de Pesquisas Florestais - CEPEF, Departamento de Ciências Florestais - DCFL, Programa de Pós Graduação em Engenharia Florestal - PPGEF
ISSN: 0103-9954
EISSN: 0103-9954
Vol. 24, No. 3, 2014, pp. 521-532
Bioline Code: cf14051
Full paper language: Portuguese
Document type: Research Article
Document available free of charge

Ciência Florestal, Vol. 24, No. 3, 2014, pp. 521-532

 pt MORFOANATOMIA DA RIZOGÊNESE ADVENTÍCIA EM MINIESTACAS DE Eucalyptus grandis check for this species in other resources x Eucalyptus urophylla check for this species in other resources
Goulart, Patrícia Bueno; Xavier, Aloisio; Iarema, Lourdes & Otoni, Wagner Campos

Resumo

O presente estudo teve como objetivo principal a caracterização morfoanatômica da rizogênese adventícia de miniestacas de quatro clones de Eucalyptus grandis check for this species in other resources x Eucalyptus urophylla check for this species in other resources . As miniestacas foram coletadas de minicepas estabelecidas em minijardim clonal, conduzido em sistema semi-hidropônico em canaletas com fertirrigação. Para a caracterização histológica do processo de rizogênese das miniestacas foram coletadas amostras teciduais aos 0, 1, 2, 4, 6, 8, 10 e 12 dias após o estaqueamento em casa de vegetação climatizada, para enraizamento. As amostras foram fixadas em FAA70%, desidratadas em série etílica e incluídas em metacrilato. Os resultados revelaram a origem endógena de primórdios radiculares a partir do câmbio vascular e, em alguns casos, a proliferação e a formação de uma massa de células desorganizadas (calos) em miniestacas dos clones avaliados, entre 8 e 12 dias de idade.

Palavras-chave
miniestaquia; propagação vegetativa; anatomia

 
 en MORPHO-ANATOMIC OF ADVENTITIOUS RHIZOGENESIS IN MINI-CUTTINGS OF Eucalyptus grandis check for this species in other resources x Eucalyptus urophylla check for this species in other resources
Goulart, Patrícia Bueno; Xavier, Aloisio; Iarema, Lourdes & Otoni, Wagner Campos

Abstract

The present work aimed to accomplish the histological analysis of the events involved in the adventitious rooting pattern of four Eucalyptus grandis check for this species in other resources x Eucalyptus urophylla check for this species in other resources clones. The mini-cuttings were collected from a mini-stump and the rooting experiments were set up under mini-hedge indoor semi-hydroponics by means of intermittent flooding fertirrigation. For histological analyses, the proximal ends of the minicuttings were collected after 0, 1, 2, 4, 6, 8, 10, and 12 days after planting them at greenhouse. After fixation with FAA70%, the samples were dehydrated in a graded ethanol series and infiltrated overnight in metracrilate resin, and finally embedded in resin. It was verified the endogenous origin of adventitious root primordia from vascular cambium, and in some cases, the formation and proliferation of calli at the proximal end of the mini-cuttings within 8 to 12 days.

Keywords
mini-cuttings; vegetative propagation; anatomy

 
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Alternative site location: http://cascavel.ufsm.br/revistas/ojs-2.2.2/index.php/cienciaflorestal/index

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