[article]
| Titre : |
Reproductive ecology of Rhododendron ponticum (Ericaceae) in relict Mediterranean populations |
| Type de document : |
Électronique |
| Auteurs : |
José A Mejías ; Juan Arroyo ; Fernando Ojeda |
| Année de publication : |
2002 |
| Article en page(s) : |
297-311 |
| Langues : |
Anglais (eng) |
| Catégories : |
[CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes
|
| Mots-clés : |
Rhododendron ponticum L. |
| Résumé : |
In the southern Iberian Peninsula, Rhododendron ponticum occurs in restricted and vulnerable populations as a Tertiary relict. Population structure and the main phases of the reproductive process were examined in order to shed light on recruitment patterns and limitations. Rhododendron ponticum flowers are self-compatible and attract a diverse array of insects, which are responsible for a considerable number of seeds set in the populations. Nevertheless, only adults form populations, whilst seedlings are scarce and saplings virtually absent (only two juveniles out of 2489 adults sampled). Non-specialized vegetative multiplication by layering was observed. Recruitment failure seems to depend on the scarcity of safe microsites, which are free from drought, for seedling establishment. The observations contrast with R. ponticum's reputation as an aggressive invader in temperate Atlantic areas. It is proposed that the species shows a variable balance between sexual reproduction and vegetative multiplication depending on environmental conditions. At present, only the latter seems to be prevailing in relict populations in the Iberian Peninsula. This flexible reproductive strategy is also discussed as a mechanism allowing persistence during geological climatic oscillations. |
| Lien pérenne : |
DOI : 10.1046/j.1095-8339.2002.00103.x  |
| Permalink : |
https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141879 |
in Botanical journal of the Linnean Society > 140 (2002) . - 297-311
Mejías, José A, Arroyo, Juan, Ojeda, Fernando
2002
Reproductive ecology of Rhododendron ponticum (Ericaceae) in relict Mediterranean populations.
Botanical journal of the Linnean Society, 140: 297-311.
|
Reproductive ecology of Rhododendron ponticum (Ericaceae) in relict Mediterranean populations in Botanical journal of the Linnean Society, 140 (2002)
