Reguladores vegetais na germinação e desenvolvimento de duas espécies de maracujá
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Data
2007-02-23
Autores
Roters, Jéssica Maria Coutinho [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O trabalho objetivou verificar o efeito de reguladores vegetais no processo da germinação e no crescimento de plantas de duas espécies de maracujá (Passiflora cincinnata Mast. e P. setacea DC.). Na germinação as sementes foram tratadas com: testemunha (água); escarificação mecânica com lixa; GA4+7 + FMAP 800, 1000, 1200 e 1400 mg L-1; escarificação + GA4+7 + FMAP 800, 1000, 1200 e 1400 mg L-1. O experimento foi inteiramente casualizado com 4 repetições de 40 sementes cada, sendo as sementes mantidas à temperatura constante de 25oC, por um período de 30 dias. Foram avaliados os efeitos dos reguladores vegetais na porcentagem e velocidade média de germinação. No desenvolvimento das plantas jovens de maracujá, estas foram replantadas em sacos de polietileno, contendo terra adubada e irrigadas quando necessário. Sessenta dias após o transplantio, estas foram tratadas com os seguintes reguladores vegetais através de pulverização foliar: testemunha (água); IBA 100 mg L–1 + GA3 100 mg L–1; IBA 100 mg L–1 + BA 100 mg L–1; GA3 100 mg L–1 + BA 100 mg L–1; IBA 100 mg L-1 + CCC 100 mg L-1; GA3 a 100 mg L-1 + CCC 100 mg L-1; BA a 100 mg L-1 + CCC 100 mg L-1; IBA 100 mg L–1 + GA3 100 mg L–1 + BA 100 mg L-1 e IBA 100 mg L–1 + GA3 100 mg L–1 + BA 100 mg L–1 + CCC 100 mg L-1. As aplicações foram realizadas aos 60, 80,100,120,140 e 160 dias após o transplantio. As características avaliadas foram: altura da planta (cm) e diâmetro do caule (mm), realizadas antes da aplicação dos reguladores vegetais e a intervalos de 20 dias, totalizando 5 avaliações. Na última avaliação também avaliou-se a massa seca de folhas, caule e raiz e o número de folhas. O resultado obtido quanto à germinação mostrou que o tratamento que proporcionou maior porcentagem de germinação, em ambas as espécies, foi GA4+7 + FMAP a 800 mg L–1. No desenvolvimento das...
This study aimed to verify the effect of plant growth regulators in the germination process and growth of plants of Passiflora cincinnata Mast. and P. setacea DC. For germination, the seeds were treated with: control (water); mechanical scarification with sandpaper; GA4+7 + FMAP 800, 1000, 1200, and 1400 mg L-1; scarification + GA4+7 + FMAP 800, 1000, 1200, and 1400 mg L-1. The experiment was completely randomized with 4 replicates of 40 seeds each; the seeds were maintained at constant temperature (25oC) for a period of 30 days. The effects of plant growth regulators on germination percentage and mean germination velocity were evaluated. In the development of young passion plants, these were replanted in polyethylene bags containing fertilized dirt; irrigation was provided as needed. Sixty days after replanting, the plants were treated with the following plant growth regulators by leaves application: control (water); IBA 100 mg L-1 + GA3 100 mg L–1; IBA 100 mg L–1 + BA 100 mg L–1; GA3 100 mg L–1 + BA 100 mg L–1; IBA 100 mg L-1 + CCC 100 mg L-1; GA3 at 100 mg L-1 + CCC 100 mg L-1; BA at 100 mg L-1 + CCC 100 mg L-1; IBA 100 mg L–1 + GA3 100 mg L–1 + BA 100 mg L-1, and IBA 100 mg L–1 + GA3 100 mg L–1 + BA 100 mg L–1 + CCC 100 mg L-1. Applications were performed at 60, 80,100,120,140, and 160 days after replanting. The characteristics evaluated were: plant height (cm) and stem diameter (mm), obtained prior to the application of plant growth regulators and at 20-day intervals, totaling 5 evaluations. In the last evaluation, we also determined dry mass of leaves, stems, and roots, as well as number of leaves. The germination result showed that the treatment which provided the highest germination percentage in both species was GA4+7 + FMAP at 800 mg L–1. With regard to plant development, the best result for plant height ...(Complete abstract click electronic access below)
This study aimed to verify the effect of plant growth regulators in the germination process and growth of plants of Passiflora cincinnata Mast. and P. setacea DC. For germination, the seeds were treated with: control (water); mechanical scarification with sandpaper; GA4+7 + FMAP 800, 1000, 1200, and 1400 mg L-1; scarification + GA4+7 + FMAP 800, 1000, 1200, and 1400 mg L-1. The experiment was completely randomized with 4 replicates of 40 seeds each; the seeds were maintained at constant temperature (25oC) for a period of 30 days. The effects of plant growth regulators on germination percentage and mean germination velocity were evaluated. In the development of young passion plants, these were replanted in polyethylene bags containing fertilized dirt; irrigation was provided as needed. Sixty days after replanting, the plants were treated with the following plant growth regulators by leaves application: control (water); IBA 100 mg L-1 + GA3 100 mg L–1; IBA 100 mg L–1 + BA 100 mg L–1; GA3 100 mg L–1 + BA 100 mg L–1; IBA 100 mg L-1 + CCC 100 mg L-1; GA3 at 100 mg L-1 + CCC 100 mg L-1; BA at 100 mg L-1 + CCC 100 mg L-1; IBA 100 mg L–1 + GA3 100 mg L–1 + BA 100 mg L-1, and IBA 100 mg L–1 + GA3 100 mg L–1 + BA 100 mg L–1 + CCC 100 mg L-1. Applications were performed at 60, 80,100,120,140, and 160 days after replanting. The characteristics evaluated were: plant height (cm) and stem diameter (mm), obtained prior to the application of plant growth regulators and at 20-day intervals, totaling 5 evaluations. In the last evaluation, we also determined dry mass of leaves, stems, and roots, as well as number of leaves. The germination result showed that the treatment which provided the highest germination percentage in both species was GA4+7 + FMAP at 800 mg L–1. With regard to plant development, the best result for plant height ...(Complete abstract click electronic access below)
Descrição
Palavras-chave
Fisiologia vegetal, Botânica, Maracuja - Crescimento, Germinação, Reguladores vegetais, Passion plants
Como citar
ROTERS, Jéssica Maria Coutinho. Reguladores vegetais na germinação e desenvolvimento de duas espécies de maracujá. 2007. 62 f. Dissertação (mestrado) - Universidade Estadual Paulista, Instituto de Biociências de Botucatu, 2007.