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AVOCADO SEEDLINGS MULTIPLE STEMS PRODUCTION

ABSTRACT 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...

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Bibliographic Details
Published in:Revista Brasileira de Fruticultura 2016, Vol.38 (2)
Main Authors: PAIXÃO, MARCUS VINICIUS SANDOVAL, LOPES, JOSÉ CARLOS, SCHMILDT, EDILSON ROMAIS, ALEXANDRE, RODRIGO SOBREIRA, MENEGHELLI, CAROLINE MERLO
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Language:English
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Summary:ABSTRACT 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: 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. RESUMO Objetivou-se avaliar o potencial de policaulia em sementes de abacateiro de acordo com a massa das sementes e o enraizamento adventício das brotações policaulicas 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: 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
ISSN:0100-2945
1806-9967
0100-2945
DOI:10.1590/0100-29452016221