caa a22 4500 463168356 CHVBK 20180406164806.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10530-006-9044-2 doi (NATIONALLICENCE)springer-10.1007/s10530-006-9044-2 Phytotoxic activity of caulerpenyne from the Mediterranean invasive variety of Caulerpa racemosa [Elektronische Daten] a potential allelochemical [Raffaella Raniello, Ernesto Mollo, Maurizio Lorenti, Margherita Gavagnin, Maria Buia] Allelopathy has been postulated as a factor in the colonisation success of Caulerpa racemosa var. cylindracea, an introduced chlorophyte alga which has become invasive in the Mediterranean Sea. In order to reveal their possible phytotoxic activity, secondary metabolites were isolated from a population growing in the Gulf of Naples (Italy) and tested on leaf tissue of the native seagrass Cymodocea nodosa, which often co-occurs with Caulerpa in nature. The seaweed metabolites were identified by 1H and 13C NMR analysis and leaf portions of C. nodosa were exposed to crude diethyl ether extract and purified compounds in the laboratory, under controlled conditions of irradiance and temperature for a period of 144h. Eventual changes in the photosynthetic performance of the seagrass tissue following the treatment were tested by monitoring its optimal quantum yield with a pulse amplitude modulated (PAM) fluorometer. One of the identified compounds, caulerpenyne, showed a phytotoxic effect, while the other purified metabolites did not reveal any effect at the assayed concentrations. Thus, our results seem to suggest a possible allelopathic activity of caulerpenyne, which may play a role in the successful competition of the invasive C. racemosa var. cylindracea with native macrophytes, such as seagrasses. Springer Science+Business Media B.V., 2006 Allelopathic interaction nationallicence Caulerpa racemosa nationallicence Caulerpenyne nationallicence Chlorophyll fluorescence nationallicence Invasive species nationallicence Phytotoxicity nationallicence Seagrass nationallicence Raniello Raffaella Stazione Zoologica ‘Anton Dohrn', Laboratorio di Ecologia del Benthos, Punta S. Pietro, 80077, Ischia, Napoli, Italy aut Mollo Ernesto Istituto di Chimica Biomolecolare, CNR, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy aut Lorenti Maurizio Stazione Zoologica ‘Anton Dohrn', Laboratorio di Ecologia del Benthos, Punta S. Pietro, 80077, Ischia, Napoli, Italy aut Gavagnin Margherita Istituto di Chimica Biomolecolare, CNR, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy aut Buia Maria Stazione Zoologica ‘Anton Dohrn', Laboratorio di Ecologia del Benthos, Punta S. Pietro, 80077, Ischia, Napoli, Italy aut Biological Invasions Kluwer Academic Publishers 9/4(2007-06-01), 361-368 1387-3547 9:4<361 2007 9 10530 https://doi.org/10.1007/s10530-006-9044-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10530-006-9044-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Raniello Raffaella Stazione Zoologica ‘Anton Dohrn', Laboratorio di Ecologia del Benthos, Punta S. Pietro, 80077, Ischia, Napoli, Italy aut NATIONALLICENCE 700 1- Mollo Ernesto Istituto di Chimica Biomolecolare, CNR, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy aut NATIONALLICENCE 700 1- Lorenti Maurizio Stazione Zoologica ‘Anton Dohrn', Laboratorio di Ecologia del Benthos, Punta S. Pietro, 80077, Ischia, Napoli, Italy aut NATIONALLICENCE 700 1- Gavagnin Margherita Istituto di Chimica Biomolecolare, CNR, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy aut NATIONALLICENCE 700 1- Buia Maria Stazione Zoologica ‘Anton Dohrn', Laboratorio di Ecologia del Benthos, Punta S. Pietro, 80077, Ischia, Napoli, Italy aut NATIONALLICENCE 773 0- Biological Invasions Kluwer Academic Publishers 9/4(2007-06-01), 361-368 1387-3547 9:4<361 2007 9 10530 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer