Enraizamento de estacas de azaleia (Rhododendron simsii Planch.) no outono em AIB e diferentes substratos

Lone, Alessandro Borini; Unemoto, Lilian Keiko; Yamamoto, Lilian Yukari; Costa, Luciana; Schnitzer, Jeniffer Aparecida; Sato, Alessandro Jefferson; Ricce, Wilian da Silva; Assis, Adriane Marinho de; Roberto, Sérgio Ruffo

doi:10.1590/s0103-84782010000800008

Cited by 20 publications

(14 citation statements)

References 9 publications

(8 reference statements)

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“…And in relation to the rooted cuttings percentage, there was no significant interaction between the IBA concentrations and the substrate, with averages between 96 and 99%, respectively (LONE et al, 2010). According to Ramos et al (2003), the supply of auxin, in certain amounts, can promote hormonal change, favoring or not the cuttings.…”

Section: Resultsmentioning

confidence: 95%

Avocado Seedlings Multiple Stems Production

et al. 2016

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-This study aimed to evaluate the potential of multi-stems in avocado seeds according to their mass as well as the adventitious rooting of multi-stem budding with or without the use of auxin. The research was carried out at the Vegetation House of Federal Institute of Espírito Santo, Campus Santa Teresa -ES, with seeds of different masses: <60 g, 61 to 80 g, 81 to 100 g and >100 g, in which each experimental unit was made of five seeds, distributed within five repetitions, under a completely randomized design. The seeds were put to germinate and the percentage number of emergence and multiple stems were evaluated. After 150 days, the following evaluations were carried out: survival of rooted cuttings; number of leaves; stem diameter; root length; root volume; root and shoot fresh mass; root and shoot dry mass; shoot height; absolute growth and shoot growth rate; shoot dry weight/root dry mass ratio; shoot height/stem diameter ratio; shoot height/root length and Dickson's quality index ratio. Avocado seeds with mass over 100 g and between 81-100 g presented higher percentage of multiple stems. Rods over 20 cm that were not treated with IBA (indole-3-butyric acid) resulted on avocado plants of better quality. The use of IBA (2000 mg L -1 ) does not affect the rooting and growth of avocado's multi-stem plants. Index terms: Avocado, seeds, multi-stem, rooting, auxin, Persea americana Miller. PRODUÇÃO DE MUDAS POLICAULICAS DE ABACATEIRORESUMO -Objetivou-se avaliar o potencial de policaulia em sementes de abacateiro de acordo com a massa das sementes e o enraizamento adventício das brotações policáulicas com e sem o uso de auxina. O trabalho foi realizado na casa de vegetação do IFES, Campus Santa Teresa-ES, com sementes de diferentes massas: <60 g; 61 a 80 g; 81 a 100 g e >100 g, em que, cada unidade experimental foi composta por cinco sementes, distribuídas em cinco repetições, num delineamento inteiramente casualizado. As sementes foram colocadas para germinar, e foram avaliados o número de hastes emergidas, a porcentagem de emergência e de policaulia. Após 150 dias, foram avaliados: sobrevivência das estacas enraizadas; número de folhas; diâmetro do coleto; comprimento da raiz; volume de raízes; massa fresca das raízes e da parte aérea; massa seca das raízes e da parte aérea; altura da parte aérea; crescimento absoluto e taxa de crescimento da parte aérea; relação da massa seca da parte aérea com a massa seca de raízes; relação da altura da parte aérea com o diâmetro do coleto; relação da altura da parte aérea com o comprimento da raiz, e índice de qualidade de Dickson. Sementes de abacate com massas acima de 100 g e entre 81-100 g apresentam maiores percentuais de policaulia. As hastes acima de 20 cm não tratadas com o AIB resultaram em mudas de abacate de melhor qualidade. O uso de AIB (2.000 mg L -1 ) não afeta o enraizamento e o crescimento das mudas policáulicas de abacateiro. Termos para indexação: Abacate, semente, policaulia, enraizamento, auxina, Persea americana Miller.

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Section: Resultsmentioning

confidence: 95%

Avocado Seedlings Multiple Stems Production

et al. 2016

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“…This is probably due to the endogenous concentration of 3-indoleacetic acid (IAA), which managed to ensure the response. This natural auxin, which is naturally produced in the leaves and buds, moves to the low part of the plant, increasing its concentration at the base of the cut, along with other endogenous substances, stimulating root formation (Lone et al 2010, Hartmann et al 2011.…”

Section: Resultsmentioning

confidence: 99%

Effect of synthetic auxins on in vitro and ex vitro bromeliad rooting

Martins

Schimildt

Alexandre

et al. 2013

Pesqui. Agropecu. Trop.

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The tissue culture can contribute to the propagation of several economic species, such as the bromeliads. This research aimed at evaluating the auxins type and concentration in the in vitro and ex vitro rhizogenesis of Neoregelia concentrica bromeliad. N. concentrica shoots were induced in a growth medium with 15.0 µM of 6-benzylaminopurine, for 80 days, followed by sub-cultivation in phytoregulator-free medium, for 45 days. In the in vitro rhizogenesis, the shoots grew in a medium supplemented with indole-3-butyric acid (IBA) or naphthalene-acetic acid (NAA), at the concentrations of 0.0 µM, 1.0 µM, 2.0 µM, 3.0 µM and 4.0 µM. In the ex vitro rhizogenesis, the bases of shoots were immersed, for 60 minutes, in IBA or NAA solutions, at the concentrations of 0.0 µM, 5.0 µM, 10.0 µM and 15.0 µM. After immersion, the shoots were planted in plastic trays with vermiculite. At the end of each rhizogenesis method, the phytotechnical parameters analysis was carried out. For the in vitro rhizogenesis, a higher number of roots were observed when the shoots were cultivated in concentrations higher than 1.0 µM of NAA, when compared to the IBA. However, the rooting rate differed only at 30 days after the in vitro growth, with a higher root induction in the shoots grown with NAA. At 60 days, the rooting rate was higher than 90% and statistically similar in all treatments. In the ex vitro rhizogenesis, a better formation of the rooting system was observed when 5.0 µM of IBA was applied, with higher rooting averages and number of roots.

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“…O processo de formação de raízes em estacas também está relacionado ao substrato, que exerce influência na qualidade das raízes formadas e no percentual de enraizamento (KÄMPF et al, 2006;LONE et al, 2010b). Dessa forma, é fundamental a seleção de substratos que possibilitem a retenção de água suficiente para prevenir a dessecação da base da estaca e possuam espaço poroso, para facilitar o fornecimento de oxigênio, para a iniciação e desenvolvimento radicular.…”

Section: Introductionunclassified

“…O material deve apresentar boa aderência à estaca e não conter substância fitotóxica à espécie FACHINELLO et al, 2005). Entre os materiais comumente usados estão a vermiculita, a casca de arroz carbonizada e a fibra de coco (ZIETEMANN & ROBERTO, 2007;LONE et al, 2010b).…”

Section: Introductionunclassified

“…Dentre as auxinas sintéticas mais utilizadas no processo de estaquia, o ácido indolbutírico (AIB) é bastante efetivo para um grande número de espécies e relativamente estável, sendo pouco suscetível à ação dos sistemas de enzimas de degradação de auxinas, além de não ser tóxico à maioria das plantas (PIRES & BIASI, 2003). No entanto, o efeito benéfico das auxinas exógenas varia entre espécies, cultivares e concentrações (VILLA et al, 2003;MAIA & BOTELHO, 2008;LONE et al, 2010b).…”

Section: Introductionunclassified

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