Armazenamento e qualidade de sementes de tomate enriquecidas com micronutrientes e reguladores de crescimento

Abstract

RESUMOO estudo foi desenvolvido na Universidade Federal de Lavras, em Lavras, MG, com o objetivo de avaliar o efeito da aplicação de micronutrientes e reguladores de crescimento na germinação, no vigor, na atividade de algumas enzimas e no teor de proteínas totais em sementes de tomate, durante o armazenamento. As sementes foram tratadas com os produtos Starter ® , Cellerate ® e Stimulate ® nas dosagens correspondentes a 0%, 50%, 100%, 150% e 200% da dose recomendada pelo fabricante, utilizando a técnica de peliculização. As avaliações foram realizadas aos zero, 6 e 12 meses de armazenamento, pelos seguintes parâmetros: porcentagem de germinação, porcentagem e índice de velocidade de emergência, atividade das enzimas endo-â-mananase e esterase, teor de proteínas totais e sanidade. Foi utilizado o delineamento inteiramente casualizado, em esquema fatorial 3 x 5 x 3 ( 3 produtos x 5 doses x 3 épocas de armazenamento), com quatro repetições de 50 sementes por tratamento. Concluiu-se que a combinação dos reguladores de crescimento contidos no produto Stimulate ® promove aumento na velocidade de emergência das plântulas de tomate quando aplicados na dose recomendada e na pré-semeadura; a atividade da enzima esterase aumenta com o período de armazenamento das sementes de tomate, indicando aumento no processo de deterioração; o revestimento enriquecido com os micronutrientes e reguladores de crescimento contidos nos produtos Starter ® , Cellerate ® e Stimulate ® e o armazenamento interferem na atividade da enzima endo-â-mananase em sementes de tomate; há um aumento no teor de proteínas totais em sementes de tomate com o aumento do período de armazenamento.Termos para indexação: Tratamento de sementes, peliculização, esterase, endo-â-mananase, proteínas totais. ABSTRACTThe objective of this study was to evaluate the effect of the application of micronutrients and growth regulators on the germination, vigor, activity of some enzymes, and on the total protein contents in tomato seeds during the storage. The seeds were treated with the chemicals Starter ® , Cellerate ® , and Stimulate ® at the dosages corresponding to 0%, 50%, 100%, 150%, and 200% of the dose recommended by the manufacturer, utilizing the film-coating technique. The evaluations were performed at 0, 6, and 12 months of storage by the following parameters: percentage of germination, percentage and emergency velocity rate, activity of enzymes endo-â-mannanase and esterase, total protein content, and health. The completely randomized design in a 3 x 5 x 3 factorial structure was utilized, namely, three chemicals, five doses, and three storage periods with four replicates of 50 seeds per treatment. Coating with the chemicals based on micronutrients and growth regulators and storage interfere on the activity of enzyme endo-â-mannanase in the tomatoes and seeds; the activity of enzyme esterase increases with the storage of tomato seeds, pointing to an increase in the deterioration process; there is an increase in the total protein content in tomato seeds througho...

Perennial soybean seeds coated with high doses of boron and zinc

“…These results agree with Araújo and Silva (2012), whose work with cotton trees highlights the direct connection between B and the plant development; and Funguetto et al (2010) who highlight the Zn participation in different metabolic routes which provide growth, therefore influencing the plant's active photosynthetic area. Nevertheless, Albuquerque et al (2010) report the negative influence of Zn to the plants growth when it is found in high amounts in the environment. Regarding the roots production, which are important for growth parameters due to its importance in the absorption of nutrients and water, there was no significant effect of treatments for variables, root length, root dry mass, number of ramifications, total root size (Table 2).…”

Attributes of growth, physiological quality and isoenzymatic expression of common bean seeds produced under the effect of gibberellic acid

“…The esterase isozyme presents itself as an important molecular tool that allows evaluating the physiological quality of the seeds (Albuquerque et al, 2010). This is related to the ester hydrolysis reactions, maintaining a direct relationship with the lipid metabolism and the degeneration process of the cell membranes (Santos et al, 2004).…”

“…This is related to the ester hydrolysis reactions, maintaining a direct relationship with the lipid metabolism and the degeneration process of the cell membranes (Santos et al, 2004). The presence of lipids during the germination process of the seeds is important for the restoration of embryonic axis growth (Veiga et al, 2010).…”

Response of wheat seeds to zinc application during storage

“…According to Albuquerque et al (2010), Zn, when applied to seeds, can be completely absorbed by the seedlings, especially when grown in a sandy substrate, thus preventing nutrient losses. In addition, the difference initial seedling emergence and emergence between the control and various zinc levels can be explained by the direct contact of roots with the mineral (Prado et al, 2007), which might enhance germination and vigor (Ribeiro and Santos, 1996).…”