Seed germination and conservation of endangered species from the Italian Alps : Physoplexis comosa and Primula glaucescens
Articolo
Data di Pubblicazione:
2004
Citazione:
Seed germination and conservation of endangered species from the Italian Alps : Physoplexis comosa and Primula glaucescens / B. Cerabolini, R.D. Andreis, R.M. Ceriani, S. Pierce, B. Raimondi. - In: BIOLOGICAL CONSERVATION. - ISSN 0006-3207. - 117:3(2004), pp. 351-356.
Abstract:
Physoplexis comosa and Primula glaucescens, endemic to calcareous grasslands of the Lombardy Prealps, northern Italy, are protected under Annex IV of European Community Directive 92/43/EEC. Seed germination dynamics of these species were studied with the aim of producing appropriate germination protocols for use in ex situ conservation. Seeds were collected from Monte Barro (922 m a.s.l.) and for Primula glaucescens from three additional sites in a more central part of its range (1217-2521 m a.s.l.). Physoplexis comosa germinated only in sterile in vitro conditions, in which germination percentages were extremely low without a supply of gibberellic acid (GA3; 1.7%) ; the optimum GA3 concentration was 100 mg l-1 (> 90% germination), with lower germination at higher doses of 250-500 mg l -1. Primula glaucescens germinated in both sterile and non-sterile conditions and, although total germination was not affected by GA3 concentration, doses of 10-500 mg l-1 acted equally to prompt earlier and more rapid germination. Primula glaucescens from Monte Barro was characterised by slower and poorer germination than from central sites.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Conservation; Endemic species; Germination; Gibberellic acid; Phytohormone
Elenco autori:
B. Cerabolini, R.D. Andreis, R.M. Ceriani, S. Pierce, B. Raimondi
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