Estratégias para produção de mudas de tomateiro utilizando paclobutrazol
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Data
2013-04
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Resumo
The modern tomato production, either for fruit table production or for processing, has required quality
seedlings, able to withstand environmental adversities after planting and maintaining the standard
genotype productive. The aim of this study was to evaluate the effect of three concentrations of PBZ
(0, 50 and 100 mg L-1) and two methods of application (seed treatment and watering seedlings) on
seedling emergence and seedling production of tomato growth indeterminate. We adopted a completely
randomized in a 2x3 factorial scheme with four replications. We evaluated the seedling emergence,
the rate of speed of emergence, seedling height and diameter of hypocotyl and their absolute growth
rate (TCA), leaf area, dry weight of shoots, roots and total, and reason leaf area (RAF). Results were
subjected to analysis of variance and the mean levels of the factor “methods of application” compared by Tukey test at 5% and the mean levels of the factor “concentrations” subjected to regression analysis.
The application of paclobutrazol via seedlings watering did not affect seedling emergence, significantly
reduced the rate of seedling growth and, consequently, the size of the seedlings without affecting the
diameter of hypocotyl, plus allow accumulation of dry roots. A concentration of 50 mg L-1 was shown
to be sufficient to obtain seedlings more compact, subject to leaf area, the application via watering,
beyond allowing an increase of about 37% in dry weight of roots.
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Solanum lycopersicum L., Estiolamento de mudas, Triazol, Regulador de crescimento, Solanum lycopersicum L., Seedling etiolation, Triazole, Growth regulator
Citação
SELEGUINI, Alexsander; FARIA JÚNIOR, Max Jose Araújo; BENETT, Katiane Santiago Silva; LEMOS, Odair Lacerda; SENO, Shizuo. Estratégias para produção de mudas de tomateiro utilizando paclobutrazol. Semina. Ciências Agrárias, Londrina, v. 34, n. 2, p. 539-548, mar./abr. 2013.