Plant traits and reproductive capability of the natural Bidens cernua population at Posta Fibreno Lake Reserve and a newly introduced population were analysed. Bidens cernua was included in the Red List of Italian Flora as a critically endangered species (CR) for Latium (Italy), because of its extremely local distribution and lack of representation in other protected areas in Italy. At phenological level, the life cycle phases of the new population (P), originating from the seed of the reintroduced plants, were not significantly different in length from those of the natural one (Pnat). However, P relative growth rate was 4 per cent higher than of the natural population and P plant dry mass was significantly higher than that of Pnat. Moreover, P produced 17 per cent more flower heads per plant than those of Pnat. The relatively high SLA (228 ± 27 cm2 g-1, mean value of Pnat and P) underlined B. Cernua’s strategy to invest mostly in leaf area over mass, thus increasing the potential capability of light interception. P had the potential to function in a manner that was demographically similar to Pnat. The newly created population of B. cernua will be monitored over subsequent years to evaluate plant traits and reproductive capability variations in the long term.

Monitoring plant species response to climate change / Gratani, Loretta; Varone, Laura; Crescente, MARIA FIORE; Bonito, Andrea; Fabrini, Giuseppe. - ELETTRONICO. - (2010), pp. 1-7. (Intervento presentato al convegno 4th Global Botanic Gardens Congress - Addressing Global Change: a New Agenda for Botanic Gardens tenutosi a Dublin, Ireland nel 13-18 June 2010).

Monitoring plant species response to climate change

GRATANI, Loretta;VARONE, LAURA;CRESCENTE, MARIA FIORE;BONITO, ANDREA;FABRINI, Giuseppe
2010

Abstract

Plant traits and reproductive capability of the natural Bidens cernua population at Posta Fibreno Lake Reserve and a newly introduced population were analysed. Bidens cernua was included in the Red List of Italian Flora as a critically endangered species (CR) for Latium (Italy), because of its extremely local distribution and lack of representation in other protected areas in Italy. At phenological level, the life cycle phases of the new population (P), originating from the seed of the reintroduced plants, were not significantly different in length from those of the natural one (Pnat). However, P relative growth rate was 4 per cent higher than of the natural population and P plant dry mass was significantly higher than that of Pnat. Moreover, P produced 17 per cent more flower heads per plant than those of Pnat. The relatively high SLA (228 ± 27 cm2 g-1, mean value of Pnat and P) underlined B. Cernua’s strategy to invest mostly in leaf area over mass, thus increasing the potential capability of light interception. P had the potential to function in a manner that was demographically similar to Pnat. The newly created population of B. cernua will be monitored over subsequent years to evaluate plant traits and reproductive capability variations in the long term.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/215075
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