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Seed dormancy and germination ecology of Lamyropsis microcephala: a mountain endemic species of Sardinia (Italy)

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Lamyropsis microcephala only occurs in a very restricted area in the Gennargentu massif (CE-Sardinia, Italy) at 1450-1700 m a.s.l. This rare species has been inserted in the International Union for Conservation of Nature (IUCN) Red Lists under Critically Endangered. In this study, the effect of a pre-chilling period (90 days at 5°C) on germination was investigated as well as the ability of this species to form a soil seed bank. L. microcephala seeds exhibited type 2 non-deep physiological dormancy. Pre-chilling increased the final germination percentages, the germination speed and the temperature range at which high levels of germination were observed. The high optimal germination temperatures (ca. 70% germination at 30°C) demonstrate that this species is well adapted to a temperate climate and the lack of a persistent soil seed bank represents a rarity trait that likely exacerbates the threats to the survival of this species.
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Document Type: Research Article

Publication date: July 1, 2009

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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