Propagação vegetativa de árvores selecionadas de Eucalyptus cloeziana F. Muell. por estaquia

Almeida, Fernanda Daniele de; Xavier, Aloísio; Dias, José Maria Moreira

doi:10.1590/s0100-67622007000300010

Cited by 29 publications

(28 citation statements)

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“…A maior indução de brotações nas árvores decepadas pode estar ligada à perda da dominância apical (ALMEIDA et al, 2007;WENDLING et al, 2009;XAVIER et al, 2013). A decepa corresponde ao método recomendado para o resgate de brotações de árvores adultas de espécies lenhosas, com resultados positivos obtidos para árvores adultas de A. angustifolia , Eucalyptus spp (ALMEIDA et al, 2007).…”

Section: Resultsunclassified

“…Means followed by same letter within each harvest and means followed by same capital letter from a harvest do not differ by Tukey test at 5% probability. O anelamento do caule, apesar de ter induzido menor número de brotações de A. macrocarpa, é uma técnica importante para o resgate de árvores, principalmente em casos da decepa não ser possível, com resultados positivos para E. cloeziana (ALMEIDA et al, 2007), I. paraguariensis (SANTIN et al, 2008).…”

Section: Induction Of Basal Shoots In a Macrocarpa Adult Trees Afteunclassified

“…A estaquia tem sido a técnica mais utilizada na propagação de genótipos de interesse selecionados na idade adulta, principalmente Eucalyptus (ALMEIDA et al, 2007;FERRARI et al, 2004;WENDLING, 2003;XAVIER et al, 2013). A obtenção de brotações com maior aptidão ao enraizamento adventício consiste no primeiro passo na seleção de árvores superiores (ALMEIDA et al, 2007).…”

Section: Introductionunclassified

“…A obtenção de brotações com maior aptidão ao enraizamento adventício consiste no primeiro passo na seleção de árvores superiores (ALMEIDA et al, 2007). Portanto, o resgate de material adulto em campo constitui em etapa fundamental para a multiplicação dos genótipos superiores (ALMEIDA et al, 2007;WENDLING et al, 2009WENDLING et al, , 2013WENDLING;XAVIER, 2001).…”

Section: Introductionunclassified

“…Dentre as metodologias empregadas para a indução de brotações de árvores adultas está a enxertia, o anelamento do caule e o uso do fogo na base da árvore, o uso de galhos podados e a decepa da árvore (ALMEIDA et al, 2007;WENDLING et al, 2013;SILVA, 2010). Entretanto, nas espécies florestais há um gradiente de maturação da base para o ápice da árvore decorrente do envelhecimento ontogenético da planta (HARTMANN et al, 2011;XAVIER et al, 2013).…”

Section: Introductionunclassified

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RESGATE VEGETATIVO DE ÁRVORES DE Anadenanthera macrocarpa

Dias

Xavier

Oliveira

et al. 2015

CERNE

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RESGATE VEGETATIVO DE ÁRVORES DE Anadenanthera macrocarpaRESUMO: Objetivou-se, neste trabalho, avaliar o resgate de árvores adultas de angico vermelho (Anadenanthera macrocarpa) pela decepa da árvore e anelamento do caule, bem como a viabilidade da propagação vegetativa da espécie por meio da estaquia. O delineamento experimental utilizado foi o de blocos ao acaso, em arranjo fatorial 2 x 2, constituído de duas técnicas para a indução de brotações basais (anelamento e decepa) e dois tipos de estacas (herbáceas e semilenhosas), com quatro repetições compostas de 12 estacas por parcela. O anelamento do caule e a decepa da árvore foram eficientes na indução de brotações basais em árvores de A. macrocarpa, sendo que a decepa proporcionou maior emissão de brotações basais. As estacas herbáceas apresentaram maiores porcentuais de enraizamento, independente da técnica de resgate. De modo geral, o resgate e a propagação vegetativa de árvores adultas de A. macrocarpa foi tecnicamente eficiente. VEGETATIVE RESCUE OF Anadenanthera macrocarpa TREES ABSTRACT:The objective of this work was to evaluate the vegetative rescue of adult Anadenanthera macrocarpa trees through the induction of epicormic shoots from tree severance and stem ringing, as well as the efficiency of cutting technique on the propagation of the species. The experimental design used was random plots, in a 2 X 2 factorial arrangement, constituted by two techniques for the induction of basal shoots (tree severance and stem ringing) and cuttings types (herbaceous cuttings and semihardwoods cuttings), in four replicates and plots of 12 cuttings per repetition. The tree severance and stem ringing were efficient in the induction of basal shoots in adult A. macrocarpa trees. However, the tree severance provided higher emission of basal shoots. The herbaceous cuttings presented higher rooting percentages, independent of vegetative rescue technique. In general, we conclude that the vegetative rescue and the vegetative propagation of A. macrocarpa adult trees are technically efficient.

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Section: Resultsunclassified

Section: Induction Of Basal Shoots In a Macrocarpa Adult Trees Afteunclassified

Section: Introductionunclassified

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RESGATE VEGETATIVO DE ÁRVORES DE Anadenanthera macrocarpa

Dias

Xavier

Oliveira

et al. 2015

CERNE

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Topophysic effects differ between node and organogenic cultures of the eucalypt Corymbia torelliana × C. citriodora

Hung

Trueman

2010

Plant Cell Tiss Organ Cult

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The eucalypt Corymbia torelliana 9 C. citriodora is planted widely in India, Brazil and Australia although plantation establishment has been limited by inadequate seed supply and low amenability to propagation via cuttings. This study optimised node culture and organogenic culture methods for in vitro propagation of Corymbia hybrids by identifying explant position (topophysic) effects on rooting, shoot elongation and shoot proliferation. Strong, negative morphogenic gradients in shoot elongation and proliferation capacity were evident from the cotyledonary node to the fourth or fifth node of seedlings when their nodes were transferred to node culture (without benzyladenine). These topophysic effects were related to differences in rooting capacity of individual nodes. Root formation in node culture was associated with formation of long multi-nodal axillary shoots, and so higher rooting of shoots from the cotyledonary node or first true-leaf node was associated with higher shoot proliferation. However, all nodes were equally capable of shoot proliferation in organogenic culture (with 2.2 lM benzyladenine), where rooting and rapid stem elongation did not occur. Most shoots (61-100%) from both node culture and organogenic culture were converted to plantlets, with plantlet conversion and primary root number not differing significantly among explant node positions. The strong topophysic effect in node culture, combined with the lack of a topophysic effect in organogenic culture, provides for an optimised clonal propagation system based on segregation of nodes from the same seedling into separate node and organogenic culture pathways.

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Alginate encapsulation of shoot tips and nodal segments for short-term storage and distribution of the eucalypt Corymbia torelliana × C. citriodora

Hung

Trueman

2011

Acta Physiol Plant

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A protocol was developed for short-term preservation and distribution of the plantation eucalypt, Corymbia torelliana 9 C. citriodora, using alginateencapsulated shoot tips and nodes as synthetic seeds. Effects of sowing medium, auxin concentration, storage temperature and planting substrate on shoot regrowth or conversion into plantlets were assessed for four different clones. High frequencies of shoot regrowth (76-100%) from encapsulated explants were consistently obtained in hormone-free half-and full-strength Murashige and Skoog (MS) sowing media. Conversion into plantlets from synthetic seeds was achieved on half-strength MS medium by treating shoot tips or nodes with 4.9-78.4 lM IBA prior to encapsulation. Pre-treatment with 19.6 lM IBA provided 62-100% conversion, and 95-100% of plantlets survived after acclimatisation under nursery conditions. Synthetic seeds containing explants pre-treated with IBA were stored for 8 weeks much more effectively at 25°C than at 4°C, with regrowth frequencies of 50-84% at 25°C compared with 0-4% at 4°C. To eliminate the in vitro culture step after encapsulation, synthetic seeds were allowed to preconvert before sowing directly onto a range of ex vitro nonsterile planting substrates. Highest frequencies (46-90%) of plantlet formation from pre-converted synthetic seeds were obtained by transferring shoot tip-derived synthetic seeds onto an organic compost substrate. These plantlets exhibited almost 100% survival in the nursery without mist irrigation. Pre-conversion of non-embryonic synthetic seeds is a novel technique that provides a convenient alternative to somatic embryo-derived artificial seeds.

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Propagação vegetativa de árvores selecionadas de Eucalyptus cloeziana F. Muell. por estaquia

Cited by 29 publications

References 2 publications

RESGATE VEGETATIVO DE ÁRVORES DE Anadenanthera macrocarpa

RESGATE VEGETATIVO DE ÁRVORES DE Anadenanthera macrocarpa

Topophysic effects differ between node and organogenic cultures of the eucalypt Corymbia torelliana × C. citriodora

Alginate encapsulation of shoot tips and nodal segments for short-term storage and distribution of the eucalypt Corymbia torelliana × C. citriodora

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