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Título
Effects of Light/Darkness and Inhibitory Components on the Germination of Pinus pinaster
Autor
Facultad/Centro
Área de conocimiento
Datos de la obra
Programme and Book of Proceedings, Tree Seeds 2002 Chania, Crete, Sep. 11-15, 2002 / Costas A Thanos., Tannis L. Beardmore, Kristina F. Connor, Enrique L. Tolentino Jr (editors)
Editor
Atenas: Universidad de Atenas
Fecha
2002-09
Abstract
As with many other species of pine, the only possibility of regeneration for Pinus pinaster is from seed. The
advantage of germination is that it increases the genetic variability and stability of populations. This species has
an important natural recovery rate in the field after a wildfire. However, no germination or survival of seedlings
under adult trees with a capacity for producing viable seeds has been seen to exist in the field. The hypothesis of
this paper is that germination under the cover of the adult trees could be controlled by the following ecological
factors: availability of light, inhibition by substances produced by the aboveground mass of the tree or inhibition
produced by substances emitted by decomposing fallen litter. The effect of nutrient availability on germination
was analysed. The germination percentages were high in all of the treatments carried out, with a positive effect
appearing in the germination of leaf exudates and a lower percentage in the seeds left in total darkness. However,
no significant differences are observed among the total germination percentages. The main difference between
the effects of the different treatments appears in the mean time required to germinate: it was shortest in the seeds
treated with leaf exudates and longest in the seeds left in total darkness
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