Resumen

ACOSTA-PERCASTEGUI, Jeanette  y  RODRIGUEZ-TREJO, Dante Arturo. FACTORS AFFECTING GERMINATION AND PREGERMINATIVE TREATMENTS OF Lupinus montanus SEEDS . INCI [online]. 2005, vol.30, n.9, pp.123-137. ISSN 0378-1844.

The germinative characteristics of Lupinus montanus seeds were studied, taking into account the following factors: day/night temperature regime, light, and pregerminative treatment. The interaction between temperature, light and pregerminative treatment was significant for germination. The best germinations were found in the 20/15ºC temperature regime, with chemical scarification (sulfuric acid) during 15min, both under light (100% germination) and in darkness (98%). The interaction between temperature and light was also significant, with the best germination results in the 20/15ºC temperature regime, both with and without light (72.5 and 73.8%, respectively). At higher temperatures, the germination in absence of light was greater (41.2 and 33.4% at 25/20ºC and 30/25ºC, respectively) than under light (17.4 and 12.8% at 25/20ºC and 30/25ºC, respectively). This indicates that shady microsites can benefit germination of the species at higher temperatures.

Palabras clave : Chemical Scarification ; Light ; Seed Ecology ; Temperature .