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      ASPECTOS ANATÔMICOS DO ENRAIZAMENTO DA VIDEIRA MUSCADÍNIA (Vitis rotundifolia Michx.) ATRAVÉS DE ALPORQUIA

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          Abstract

          A multiplicação das videiras é comumente realizada através de processos vegetativos como a estaquia e a enxertia, os quais nem sempre apresentam resultados satisfatórios, especialmente para as espécies de difícil enraizamento, comprometendo a produção comercial. A uva muscadínia (Vitis rotundifolia Michx.) é considerada uma planta difícil de enraizar. Sua propagação através da estaquia mostra que o emprego de reguladores vegetais proporciona pouco ou nenhum benefício ao enraizamento das estacas. Atualmente, a alporquia em frutíferas vem se apresentando como um método de propagação que proporciona um bom enraizamento, aliado à aplicação de reguladores vegetais. Este trabalho procurou avaliar a eficiência do processo de alporquia com relação ao enraizamento da uva muscadínia bem como estudar a anatomia dos calos e das raízes adventícias. Pode-se concluir que a prática do anelamento mostra-se mais efetiva em proporcionar o enraizamento do que a retirada de lascas. A adição de ácido naftalenacético não afetou significativamente o enraizamento. As raízes adventícias apareceram nas proximidades da região cambial, nas regiões nodais e internodais dos ramos. Não ocorreu a formação de raízes diretamente do calo. O tecido do calo caracterizou-se por ser meristematicamente ativo e não apresentar amido.

          Translated abstract

          The propagation of grapes is ordinarily carried out by vegetative methods like cuttings and graftings, which not always present satisfactory results, especially for those species with low rooting ability, endangering the commercial production. The muscadine grape (Vitis rotundifolia Michx.) is considered recalcitrant for rooting. Its propagation by cuttings shows that growth regulators have few or no benefits on rooting. Nowadays, air-layering is reported as a propagation method that promotes good rooting when combined with the application of growth regulators. This work aimed to evaluate the efficiency of air-layering process in relation to muscadine grape rooting, as well as to study the callus and the adventitious root anatomy. The results showed that the practice of ringing is more successfull than the bark retreating for rooting. The addition of naphtalene acetic acid did not affect significantly the rooting. The adventitious roots appeard close to the cambial area at the node and internode branch regions. There was no root formation from callus tissue. Its tissue was characterized by meristematic activity and absence of starch.

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          Most cited references19

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          Plant Microtechnique

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            Simple method for differential staining of paraffin embedded plant material using toluidine blue o.

            W SAKAI (1973)
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              Botanical microtechnique.

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                Author and article information

                Journal
                sa
                Scientia Agricola
                Sci. agric. (Piracicaba, Braz.)
                Escola Superior de Agricultura "Luiz de Queiroz" (Piracicaba, SP, Brazil )
                1678-992X
                May 1998
                : 55
                : 2
                : 210-217
                Affiliations
                [01] orgnameUSP orgdiv1 Depto. de Botânica - ESALQ
                Article
                S0103-90161998000200007 S0103-9016(98)05500207
                10.1590/S0103-90161998000200007
                23108ada-37a8-45ee-ac85-3bfa663af7a4

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 20 February 1997
                : 19 March 1998
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 21, Pages: 8
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                SciELO Brazil

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                Artigos

                uva,grape,adventitious roots,callus,air-layering,Vitis rotundifolia Michx.,raizes adventícias,calo,alporquia,Vitis rotundifolia Michx

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