Resumo

CABRERA, Verónica Alejandra; DOTTORI, Nilda  e  COSA, María Teresa. Germination, reproductive success and reproductive phenology of Solanum chenopodioides (Solanaceae). Bol. Soc. Argent. Bot. [online]. 2010, vol.45, n.1-2, pp.73-80. ISSN 1851-2372.

Reproductive aspects were studied in a population of Solanum chenopodioides Lam. of Río Ceballos (Prov. Córdoba, Argentina). Tests of germination were realized with the objective to determine if chemical or physical lethargy existed due to the seminal cover, a completely randomized design to a single factor with 5 repetitions was in use. There were evaluated the percentage and the rate of germination in seeds submitted to treatments of lixiviation, chemical scarification and a control. The differences between the treatments were analyzed statistically. In order to know the number of viable seeds that enter to the environment, the reproductive success preemergente was calculated; for this 10 individuals are takes at random, it was counted ovules per flowers, seeds per fruits, flowers per inflorescence and fruits per infrutescence. In addition phenological observations were realized. There were not significant differences among the pre-germinatives treatments applied, so the germination would not be conditioned by the seminal cover. The reproductive success was 27,03%; the proportion of fruits and seed formed were elevated, but the success decrease when the germination percentage is considerate, so this it would be conditioning the reproductive efficiency. The period of floration extends approximately from half-filled of october until ends of march.

Palavras-chave : Germination; Lethargy; Reproductive success; Phenology.

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