INVESTIGADORES
GHERMANDI luciana
congresos y reuniones científicas
Título:
Fire cues on Fabiana imbricata seed germination.
Autor/es:
DUDINSZKY N. & L. GHERMANDI
Reunión:
Congreso; VI Southern Connection Congress; 2010
Resumen:
Fire cues on¡¡Fabiana imbricata¡¡seed germination Dudinszky, N. & Ghermandi, L. Fire may stimulate Fabiana imbricata encroachment in northwestern patagonian grasslands, because post-fire recruitment seems to be a characteristic of Fabiana imbricata shrub. The effect of fire on Fabiana imbricata seeds germination was surveyed under laboratory conditions evaluating the specific effect of temperature, charcoal, scarification and smoke treatments. We designed a factorial experiment where the factors were: smoke (10 min.), temperature (60¨¬C - 5¢¥, 60¨¬C-10 ¢¥, 90¨¬C-5¢¥, 90¨¬C-10¢¥), scarification (no escarification-scarification) and irrigation with charcoal solution (10g/lt). Ten replicates of 10 seeds each were used per treatment. The seeds were placed in petri dishes in a germination chamber (daily temperatures of 19¨¬ C and of 5¨¬C by night, 12/12 h photoperiod) during two months. In this experiment the applied temperatures seem to have no effect on Fabiana imbricata germination and the same occured with the charcoal treatment. However scarification and smoke treatments significantly stimultaed Fabiana imbricata germination. This indicates that the smoke, which occurs during grassland fires, may be an important cue in the germination and recruitment of this species.