Posidonia oceanica seeds from drift origin: Viability, germination and early plantlet development
Recruitment ofPosidonia oceanicafrom seeds is infre-quent owing to the rare and unpredictable occurrence ofsexual reproduction. However, in years of high reproduc-tive success, ample supplies of seeds become availablein drifting fruit; this could be a useful source of materialfor seabed restoration....
| Autores: | , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2008 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/251076 |
| Acesso em linha: | http://hdl.handle.net/10261/251076 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Posidonia oceanica Seagrass Seed Seedling Viability |
| Resumo: | Recruitment ofPosidonia oceanicafrom seeds is infre-quent owing to the rare and unpredictable occurrence ofsexual reproduction. However, in years of high reproduc-tive success, ample supplies of seeds become availablein drifting fruit; this could be a useful source of materialfor seabed restoration. In this study we introduce andcombine viability tests and culture procedures for eval-uating this material. Three different groups of collectedfruitsrepresentingaphenologicalormaturationsequence were tested for seed viability with tetrazolium.We also examined the effects of storage on the germ-ination and development of seedling root and shootsystems. The younger groups showed good (67–86%)germination and survival, with the tetrazolium viabilitytest proving useful for predicting these processes. How-ever, although a strong correlation between fruit andseed weight was observed, higher values of these para-meters did not confer greater germination capacity. Theseeds of fruits collected late in the season were moredeveloped and plantlet roots and shoots grew fasterunder culture, but survival after 4 weeks was reduced(40%). Under the conditions tested, viability was highlyreduced and there was no final seedling survival follow-ing storage. |
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