[article]
| Titre : |
Growth and survival of Azolla filiculoides in Britain : II. Sexual reproduction |
| Type de document : |
Imprimé |
| Auteurs : |
Rachel Janes |
| Année de publication : |
1998 |
| Article en page(s) : |
377-384 |
| Langues : |
Anglais (eng) |
| Catégories : |
[CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes
|
| Mots-clés : |
Azolla filiculoides Lam., 1783 |
| Résumé : |
Sporulation in the floating fern Azolla filiculoides Lam. is both frequent and widespread in Britain and might therefore play a greater part in the population dynamics of the species than has been suggested by earlier reports. In laboratory experiments, increasing plant density and/or phosphorus supply resulted in increased sporulation. It was estimated that a thick mat of 8 kg m2 fresh biomass can produce 380000 microsporocarps and 85000 megasporocarps per m2.
Light and temperatures >10°C were necessary for sporocarp germination. Sporocarps could survive exposure to both low temperatures (5°C for at least 3 months) and sub-zero temperatures (−10°C for at least 18 d). Sporocarps were found to survive storage in water for 3 yr and to germinate from mud samples collected in the field. In laboratory culture, sporeling growth and survival were optimal at 15°C.
There is some evidence that A. filiculoides might have adapted to the British climate since its introduction. |
| Lien pérenne : |
DOI : 10.1046/j.1469-8137.1998.00113.x  |
| Permalink : |
https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=154075 |
in New Phytologist > 138 (1998) . - 377-384
Janes, Rachel
1998
Growth and survival of Azolla filiculoides in Britain : II. Sexual reproduction.
New Phytologist, 138: 377-384.
|
Growth and survival of Azolla filiculoides in Britain in New Phytologist, 138 (1998)
