Evidence for inbreeding depression in the food-deceptive colour-dimorphic orchid Dactylorhiza sambucina (L.) Soo

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Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_88E3BB89CD99
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evidence for inbreeding depression in the food-deceptive colour-dimorphic orchid Dactylorhiza sambucina (L.) Soo
Périodique
Plant Biology
Auteur(s)
Juillet N., Dunand-Martin S., Gigord L. D.
ISSN
1435-8603 (Print)
Statut éditorial
Publié
Date de publication
01/2007
Volume
9
Numéro
1
Pages
147-151
Résumé
About one third of all orchid species are deceptive, i.e., not providing any reward to their pollinator. Such species often have lower visitation rates compared to rewarding relatives. This could result in lower levels of geitonogamous selfing and thus would provide an advantage in term of progeny fitness through inbreeding avoidance. This hypothesis could be tested by comparing the level of inbreeding depression between deceptive and rewarding orchids. However, due to the difficulty to raise orchids from seeds, few studies of inbreeding depression are available, and most are focused on very early life stages, such as seed mass or embryo viability. Here, we present the results from an experimental investigation of inbreeding depression in the deceptive flower-colour dimorphic Dactylorhiza sambucina, from in vitro cultivation to greenhouse soil transplantation. We found strong inbreeding depression at all recorded stages (i.e., germination and survival), with estimates ranging from 0.47 to 0.75. Our study finally proposes a simple and suitable experimental protocol to raise orchids from seeds with high germination rates.
Mots-clé
*Color Culture Techniques Germination *Inbreeding Orchidaceae/anatomy & histology/classification/*physiology
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2008 20:07
Dernière modification de la notice
08/05/2019 21:34
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