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Title: Physiological quality of tomato seeds treated with polymers in combination with paclobutrazol
Other Titles: Qualidade fisiológica de sementes de tomate tratadas com paclobutrazol em associação com polímeros
Keywords: Tomateiro - Estiolamento
Germinação de sementes
Tomatoes - Etiolation
Seed germination
Issue Date: Oct-2017
Publisher: Associação Brasileira de Tecnologia de Sementes
Citation: REZENDE, E. M. de et al. Physiological quality of tomato seeds treated with polymers in combination with paclobutrazol. Journal of Seed Science, Londrina, v. 39, n. 4, p. 338-343, Oct./Dec. 2017.
Abstract: In tomatoes production system, etiolation is the main cause of seedlings loss. Some inhibitors, such as paclobutrazol (PBZ), have been used to reduce this problem. This study aimed to evaluate the effect of different doses of paclobutrazol, with and without polymer association, at different degrees of permeability, on the physiological quality of seeds. Seeds of two tomato cultivars, Ozone and Paronset, were treated with four concentrations of paclobutrazol (0, 0.004, 0.008 and 0.016 g mL a.i.10 g seeds-1), and combined with three fixatives (water, P1 and P2). After the treatments, germination test, germination speed index test and cold test were carried out, and after five months of seed storage, the analyzes were repeated. The increase in PBZ dose reduces both germination percentage and germination speed index. After storage, the product acts differently on seed germination. The synthetic polymers, in the dose used in this study, are effective in PBZ fixation on the seeds coat, but do not reduce the harmful effect of PBZ on seed germination.
Appears in Collections:DAG - Artigos publicados em periódicos

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