Influence of high temperatures on seed germination of a special Pinus pinaster stand adapted to frequent fires

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Influence of high temperatures on seed germination of a special Pinus pinaster stand adapted to frequent fires

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Title: Influence of high temperatures on seed germination of a special Pinus pinaster stand adapted to frequent fires
Author: Torres Carretero, Olga;Calvo Galván, Leonor;Valbuena Relea, María Luz
xmlui.dri2xhtml.METS-1.0.item-contributor: Facultad de Ciencias Biologicas y Ambientales
xmlui.dri2xhtml.METS-1.0.item-area: Ecologia
Abstract: This study examines the effect of fire on the germination of Pinus pinaster seeds from a population with special adaptations to this type of disturbance, due to the high frequency of fires to which they have been subjected. The action of fire was simulated in the laboratory using thermal shocks. Temperatures of 60, 90, 120, 200 and 300 °C were used for exposure times of 1 and 5 min. The viability of seeds of this species from the soil seed bank of a population subjected to a wildfire was also evaluated. The results show that germination is not increase by a thermal treatment. The effect is negative at temperatures above 90 °C and exposure times of 1 min with a significant decrease in, or even no, germination. Therefore the seeds cannot stand high temperatures and reproductive effort is placed on serotinous cone development and the production of high numbers of seeds. The high viability of the seeds from the area burned by wildfire, immediately after the fire and 1 year later, show the high potential of the soil seed bank to contribute to the regeneration of the burned area.
xmlui.dri2xhtml.METS-1.0.item-desfisica: P. 129–136
Publisher: Springer
xmlui.dri2xhtml.METS-1.0.item-citation: Plant Ecology, 2006, vol. 186, n. 1
URI: http://hdl.handle.net/10612/10837
Date: 2006-09
xmlui.dri2xhtml.METS-1.0.item-tipo: info:eu-repo/semantics/preprint
Subject: Ecología. Medio ambiente
xmlui.dri2xhtml.METS-1.0.item-palclave: Fire
Heat-shock
Mediterranean pine stand
Viability
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