A multiplicação da seringueira (Hevea brasiliensis muell.-arg.) por meio de estacas

Mendes, Luiz O. T.

doi:10.1590/s0006-87051959000100017

Cited by 8 publications

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“…Also, rubber tree cuttings are difficult to root (BREAKBANE, 1961). Some studies have reported that the production of rooted cuttings of rubber tree clones was not feasible (MUZIK, 1953;MENDES, 1959), only the study by Tynley and Garner (1960) states otherwise. Zn influences the hormonal activity of the plant inducing the formation of calluses and later the adventitious root emission.…”

Section: Resultsmentioning

confidence: 99%

Zinc - rooting cofactor in rubber tree mini-cuttings

et al. 2020

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The rubber tree (Hevea brasiliensis Müell. Arg.) is a species of significant economic interest in the natural rubber industry in Brazil and the world. This species presents recalcitrance to rooting, and its cuttings are difficult to propagate. This study aimed to evaluate the effect of the pre-conditioning of rubber tree mini-cuttings with zinc on the improvement of the adventitious rooting of rootstocks. Mini-cuttings were standardized with 45 mm length and submitted to preconditioning by immersion of the mini-cutting base in solutions containing 0.00; 0.04; 0.08; 0.16; 0.32 and 0.64 mg L-1 of Zn, for 24 hours. The experimental design was randomized blocks with six treatments and four replicates of 10 mini-cuttings. The rubber tree mini-cuttings were placed in a fitotron-type growth chamber, at 25 °C, with 12-hour photoperiod, 5,000 K intensity, and 95% of relative air humidity, for 60 days. The survival rate, number of buds, percentage of mini-cuttings that had leaf abscission, the percentage of mini-cuttings with callogenesis in the root meristem, the percentage of rooted mini-cuttings, the number of primary roots and root length were evaluated. The highest values of survival rate, the number of buds, the number of primary roots, the percentage of mini-cuttings with callogenesis in the root meristem, the percentage of rooted mini-cuttings and root length were observed with 0.16 to 0.26 Mg L-1 of Zn. The use of zinc in the mini-cuttings of rubber tree reduces linearly the percentage of mini-cuttings that had leaf abscission and the formation of callogenesis in the root meristem. The rubber tree (Hevea brasiliensis Müell. Arg.) is a species of a large economic interest in the natural rubber industry in Brazil and the world. This species presents recalcitrance to rooting, and its cuttings are difficult to propagate. This study aimed to evaluate the effect of the pre-conditioning of rubber tree mini-cuttings with zinc on the improvement of the adventitious rooting of rootstocks. Mini-cuttings were standardized with 45 mm length and submitted to preconditioning by immersion of the mini-cutting base in solutions containing 0; 0.04; 0.08; 0.16; 0.32 and 0.64 mg L-1 of Zn, for 24 hours. The experimental design was randomized blocks with six treatments and four replicates of 10 mini-cuttings. The rubber tree mini-cuttings were placed in a fitotron-type growth chamber at 25 °C, with 24-hour photoperiod, 5,000 K intensity and 95% relative humidity for 60 days. The survival rate, number of buds, percentage of mini-cuttings that had leaf abscission, the percentage of mini-cuttings with callus, the percentage of rooted mini-cuttings, the number of primary roots and root length were evaluated. The highest values of survival rate, the number of buds, the number of primary roots, the percentage of mini-cuttings with callus, the percentage of rooted mini-cuttings and root length were verified with 0.16 to 0.26 Mg L-1 of Zn. The use of zinc in the mini-cuttings of rubber tree reduces linearly the percentage of mini-cuttings that had leaf abscission and the formation of root calluses.

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Section: Resultsmentioning

confidence: 99%

Zinc - rooting cofactor in rubber tree mini-cuttings

et al. 2020

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“…Além disso, esta técnica vem sendo pesquisada como uma alternativa à obtenção rápida de grande quantidade de mudas clonais, com menor custo de produção, maior facilidade de transporte e distribuição no campo (Muzik 1953;Lane, 1954;Wiersum, 1955;Muzik & Cruzado, 1956;Muzik & Cruzado, 1958;Mendes, 1959;Tinley & Garner, 1960;Tinley, 1961). Destas pesquisas, apenas Tinley & Garner (1960) mostraram ser viável a produção de estacas enraizadas de clones de seringueira em escala comercial, mesmo sabendo-se que algumas plantas tropicais de difícil enraizamento têm enraizado com o auxílio de um conjunto de técnicas modernas como estiolamento total ou localizado e estrangulamento como mencionado por Castro et al (1984) e Medrado et al (1995), bem como pelo uso de auxina exógena (AIB e ANA).…”

Section: Introductionunclassified

Produção De Mudas De Seringueira Por Meio Do Enraizamento De Estacas Coletadas De Plantas Adultas

Monteiro¹,

Marques²,

Pacheco³

2015

Agrotropica

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A propagação vegetativa da seringueira em escala comercial, através do enraizamento de estacas, é uma alternativa viável para a multiplicação de clones melhorados e recomendados para o cultivo comercial. A presente investigação teve como objetivo avaliar a possibilidade de produção de mudas clonais através do enraizamento de brotações (estacas) obtidas diretamente de seringueiras adultas, assim como o efeito de reguladores de crescimento no enraizamento das estacas. Trata-se de uma técnica alternativa para a produção de mudas clonais de forma mais rápida, econômica e que permite contornar os efeitos negativos das mudas enxertadas devido às interações entre o enxerto (clone) e o portaenxerto (cavalo). A coleta de hastes foi realizada em vários estádios de desenvolvimento e após o período de reenfolhamento das seringueiras no cultivo comercial. As estacas foram devidamente preparadas e a sua base tratada com indutores de enraizamento, ou seja, com soluções de ácido indolbutírico (AIB) e de ácido naftaleno acético (ANA), nas concentrações de 5.000 e 1.000 mg dm -3 , respectivamente. Os resultados obtidos, ainda que preliminares, foram bastante promissores, pois as estacas tratadas apresentaram primórdios de raízes logo aos 15 dias e o enraizamento se definiu aos 45 dias, em toda a seção da base das estacas. A muda de estaquia mostrou-se superior em relação a muda enxertada por borbulhia, considerando o crescimento da parte aérea (respectivamente 1,46 m contra 0,90 m de altura), obtido em mudas com um ano de idade, e ao volume e características do sistema radicular. Palavras-chave:Hevea, método de propagação, estaquia, indução de raízes.Production of rubber tree seedlings through the rooting of cuttings collected from adult plants. Vegetative propagation of rubber tree on a commercial scale by rooting cuttings is a viable alternative to the multiplication of improved and recommended clones for planting. This research aimed to evaluate the possibility of production of clonal seedlings through the rooting of shoots obtained directly from adult rubber trees, as well as growth regulators effect on rooting. This is an alternative technique for production of clonal seedlings more quickly, economically, avoiding the negative effects due to interactions between the graft (clone) and the rootstock. The rubber tree shoots were collected in the commercial planting, regarding various stages of development and after the defoliation period. The cuttings were properly prepared and their base treated with root inducers, such as the solutions of 3-Indolebutyric acid (IBA) and 1-naphthalene acetic acid (NAA), at concentrations of 5000 and 1000 ppm, respectively. The results, although preliminary, are very encouraging because the treated shoots begun to present the root primordios as early as 15 days and it was completely defined at 45 days across the whole section of the base of the stems. The rooted cutting seedlings was superior the seedlings derived by budding with respect to the plant size (1.46 m to 0.90 m) measured at one year ...

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“…sobre a possibilidade da propagação da seringueira por estaquia (MUZIK 1953;LANE, 1954;WIERSUM, 1955;MUZIK & CRUZADO, 1956e 1958MENDES 1959;TINLEY & GARNER, 1960e TINLEY, 1961. Destes autores, apenas TINLEY & GARNER (1960) mostraram ser viável a produção de estacas enraizadas de clones de seringueira em escala comercial.…”

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Alterações anatômicas em estacas de seringueira (Hevea brasiliensis clone RRIM 600) em resposta a diferentes técnicas de indução ao enraizamento

Medrado

Appezzato‐da‐Glória

Costa

1995

Sci. agric. (Piracicaba, Braz.)

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RESUMO:Clones de seringueira (Hevea spp ) são enxertados sobre porta-enxertos oriundos de sementes de ascendência desconhecida e por isto não exteriorizara todo seu potencial genético de produção de látex. A superação desta dificuldade pode ser obtida com o enraizamento de estacas clonais. Todavia, a seringueira é considerada em seu estágio adulto como uma planta de difícil enraizamento. Estas plantas possuem na base do caule um cilindro quase contínuo de tecidos lignificados, que juntamente com barraras químicas podem dificultar o enraizamento. Atualmente, algumas plantas de difícil enraizamento, têm enraizado com a ajuda de um conjunto de técnicas modernas como estiolamento total ou localizado e estrangulamento. Este trabalho, procurou caracterizar as modificações que ocorrem em estacas clonais de seringueira submetidas àquele conjunto de técnicas. Pode-se concluir que o estrangulamento da base de estacas do clone RRIM 600, assim como sua utilização em conjunto com os dois tipos de estiolamento, promoveu alterações na atividade do câmbio vascular que produziu maior número de células parenquimáticas no floema, resultando na descontinuidade da bainha de fibras perivasculares, o que representa um indício para o favorecimento ao enraizamento das estacas. Descritores: Hevea brasiliensis, estacas, raízes adventícias, anatomia ANATOMICAL CHANGES IN RUBBER TREE CUTTINGS (Hevea brasiliensis CLONE RRIM 600) IN RESPONSE TO DIFFERENT ROOTING TECHNIQUESABSTRACT: Clones of Hevea spp are presently grafted on seedlings, because no economic method of producing clonal rootstocks by vegetative means or clonal cuttings has so far been discovered. Because of this, Hevea clones do not exteriorize their maximum genetic potential for latex production. The rooting of clonal cuttings overcomes this problem. However, Hevea is considered a plant with very poor capacity of rooting, in its mature phase. Plants have at the stem base an almost continuous cylinder of lignified tissues, which along with chemical barriers can difficult rooting. At present, rooting problems in some plant species may be overcome by a combination of new techniques as it is the case of total or local etiolation and girdling. This work has the aim to characterize the modifications occurred in clonal cuttings of Hevea when subjected to the above mentioned techniques, alone or combined. It was possible to conclude that the girdling of the cutting base from the RRIM 600 clone, as well as its utilization in combination with the other two types of etiolation, promoted drastic alterations in the sheath, as compared to the control. Moreover, girdling promoted the activity of the vascular cambio, which produced a greater number of parenquimatous cells in the phloem, resulting in a discontinuity, of the perivascular fibers sheath. Other alterations elapsed of the girdling were: the division of parenquimatous cells around of the sheath forming meristematic rings and a greater number of lenticells in comparison to the control, which can favor the rooting of the cuttings.

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A multiplicação da seringueira (Hevea brasiliensis muell.-arg.) por meio de estacas

Cited by 8 publications

References 0 publications

Zinc - rooting cofactor in rubber tree mini-cuttings

Zinc - rooting cofactor in rubber tree mini-cuttings

Produção De Mudas De Seringueira Por Meio Do Enraizamento De Estacas Coletadas De Plantas Adultas

Alterações anatômicas em estacas de seringueira (Hevea brasiliensis clone RRIM 600) em resposta a diferentes técnicas de indução ao enraizamento

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