4 research outputs found

    EmergĂȘncia e desenvolvimento de plĂąntulas de maracujazeiro azedo oriundas de sementes tratadas com bioestimulante Emergence and development of passion fruit plant from seeds treated with bio stimulant

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    O objetivo do trabalho foi estudar os efeitos de bioestimulante na emergĂȘncia e no desenvolvimento de plĂąntulas de Passiflora edulis Sims.f. flavicarpa Deg. O experimento foi conduzido sob cultivo protegido, com temperatura controlada (25ÂșC), no Departamento de BotĂąnica, Instituto de BiociĂȘncias, UNESP, CĂąmpus de Botucatu-SP. As sementes receberam os tratamentos com as concentraçÔes 0 (testemunha); 4; 8; 12; 16 e 20 ml de bioestimulante/kg de semente e foram semeadas em bandejas de isopor contendo substrato comercial. O bioestimulante empregado Ă© constituĂ­do por 0,005% de ĂĄcido Ă­ndolbutĂ­rico (auxina), 0,009% de cinetina (citocinina) e 0,005% de ĂĄcido giberĂ©lico (giberelina). O delineamento experimental foi inteiramente casualizado, com seis tratamentos e cinco repetiçÔes de 24 sementes. As avaliaçÔes de porcentagem de emergĂȘncia de plĂąntulas foram realizadas semanalmente, bem como o comprimento de caule e raiz, diĂąmetro do caule, nĂșmero de folhas, ĂĄrea foliar e massa seca de raiz, caule e folha, aos 35 dias apĂłs a semeadura. Os dados foram submetidos Ă  anĂĄlise de variĂąncia e regressĂŁo polinomial, ao nĂ­vel de 5% de probabilidade. As concentraçÔes de 12 e 16 ml de bioestimulante/kg de semente aplicado Ă s sementes promoveram as maiores porcentagens de emergĂȘncia e desenvolvimento de plĂąntulas.<br>The aim of this work was the study of the effects of bio stimulants in the emergence and development of Passiflora edulis Sims.f. flavicarpa Deg. plantlet. The experiment was performed under shelter with controlled temperature (25ÂșC), at the Dep. of Botanic, Bioscience's Institute, UNESP, Campus de Botucatu, state of Sao Paulo, Brazil. The seeds were treated with different concentrations: 0 (check), 4, 8, 12, 16 and 20 ml of bio stimulant/kg of seeds and were sowed on polystyrene trays containing commercial substratum. The employed bio stimulant is comprised of 0.005% of indolylbutyric (auxin), 0.009% of kinetin (cytokine), and 0.005% of gibberellic acid. It was used the completely randomized blocks delineation with six treatment and five replications of 24 seeds. The estimation of the emergence percentage of plantlets were performed weekly and the stem and root lengths, stem diameter, number of leaves, leaf area and root, stem and leaf dry matter were performed 35 days after sowing. The data were submitted to analysis of variance and polynomial regression at 5% of probability. The concentrations of 12 and 16 ml of bio stimulant/kg of seed applied to the seeds have promoted the highest percentage of emergence and development of the plantlets
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