Title :

Patterns of diversity, endemism and specialization in the root symbiont communities of alder species on the island of corsica

Author(s) :

Pozzi, Adrien C. [Auteur]
Roy, Melanie [Auteur]
Nagati, Melissande [Auteur]
Schwob, Guillaume [Auteur]
Manzi, Sophie [Auteur]
Gardes, Monique [Auteur]
Moreau, Pierre-Arthur [Auteur]
IMPact de l'Environnement Chimique sur la Santé humaine (IMPECS) - EA 4483
Fernandez, Maria P. [Auteur]

Journal title :

The New phytologist

Abbreviated title :

New Phytol.

Publication date :

2018-01-29

ISSN :

1469-8137

Keyword(s) :

Frankia
endemism
ectomycorrhiza (EM)
Corsica
diversity
Alnus (alders)
community ecology
specialization

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

We investigated whether the diversity, endemicity and specificity of alder symbionts could be changed by isolation in a Mediterranean glacial refugium. We studied both ectomycorrhizal (EM) fungi and nitrogen-fixing ...
Show more >We investigated whether the diversity, endemicity and specificity of alder symbionts could be changed by isolation in a Mediterranean glacial refugium. We studied both ectomycorrhizal (EM) fungi and nitrogen-fixing actinobacteria associated with alders, and compared their communities in Corsica and on the European continent. Nodules and root tips were sampled on the three alder species present in Corsica and continental France and Italy. Phylogenies based on internal transcribed spacer (ITS) and a multilocus sequence analysis approach were used to characterize fungal and Frankia species, respectively. Patterns of diversity, endemism and specialization were compared between hosts and regions for each symbiont community. In Corsica, communities were not generally richer than on the mainland. The species richness per site depended mainly on host identity: Alnus glutinosa and Alnus cordata hosted richer Frankia and EM communities, respectively. Half of the Frankia species were endemic to Corsica against only 4% of EM species. Corsica is not a hotspot of diversity for all alder symbionts but sustains an increased frequency of poor-dispersers such as hypogeous fungi. Generalist EM fungi and host-dependent profusely sporulating (Sp+) Frankia were abundantly associated with Corsican A. cordata, a pattern related to a more thermophilic and xerophylic climate and to the co-occurrence with other host trees.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

IMT Lille Douai
Institut Catholique Lille
Univ. Artois
Université de Lille

Collections :

• IMPact de l'Environnement Chimique sur la Santé humaine (IMPECS) - ULR 4483
• Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515

Submission date :

2022-02-02T10:23:36Z
2022-11-24T08:34:17Z
2023-02-03T14:58:14Z
2023-02-03T15:00:06Z