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Revista Brasileira de Sementes

Print version ISSN 0101-3122

Abstract

LOPES, José Carlos  and  PEREIRA, Marcio Dias. Germination of cubiu seeds under diferent substrates and temperatures. Rev. bras. sementes [online]. 2005, vol.27, n.2, pp. 146-150. ISSN 0101-3122.  http://dx.doi.org/10.1590/S0101-31222005000200021.

The cubiu (Solanum sessiliflorum Dunal) is a native arbustiva solanacea of the Amazon whose fruits present a high concentration citric acid. This study was carried to verify the effect of substrate and temperature on the germination capacity of cubiu seeds. This study was developed in the Seed Analysis Laboratories at the Agrarian Science Center at the Universidade Federal do Espírito Santo (CCA-UFES), Alegre-ES, Brazil. A cinpletely randomized design was used with four repetitions of 50 seeds, in a 6x6 factorial outline, with six substrates (on vermiculite (V); between sand (EA); on paper (SP); on sand (SA); on mixture soil+sand+esterco (TAE) and paper roll (RP) and six temperatures (constant of 20, 25 and 30ºC and alternated of 20-25; 25-30 and 20-30ºC). The following characteristics were assessed: germination (%); emergency speed index(IVE); hard and deteriorated seeds (%); normal and abnormal seedlings (%); seedlings height (mm) and canopy and root dry matter (mg). The results showed that the substrate on sand and between sand under 20-30ºC were the best conditions for cubiu seed germination.

Keywords : Solanun sessiliflorum; germination capacity; vigor.

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