IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Genetic diversity patterns of arbuscular mycorrhizal fungi associated with the mycoheterotroph Arachnitis uniflora Phil. (Corsiaceae)
Autor/es:
COFRÉ, N.; SÉRSIC, A.N.; ACOSTA, M.C.; BIDARTONDO, M.; RENNY, M.; DOMINGUEZ, L.
Revista:
ANNALS OF BOTANY
Editorial:
OXFORD UNIV PRESS
Referencias:
Lugar: Oxford; Año: 2017 vol. 119 p. 1279 - 1294
ISSN:
0305-7364
Resumen:
_ Background and Aims Arachnitis uniflora is a mycoheterotrophic plant that exploits arbuscular mycorrhizalfungi of neighbouring plants. We tested A. uniflora?s specificity towards fungi across its large latitudinal range, aswell as the role of historical events and current environmental, geographical and altitudinal variables on fungal geneticdiversity._ Methods Arachnitis uniflora mycorrhizas were sampled at 25 sites. Fungal phylogenetic relationships were reconstructed,genetic diversity was calculated and the main divergent lineages were dated. Phylogeographical analysiswas performed with the main fungal clade. Fungal diversity correlations with environmental factors wereinvestigated._ Key Results Glomeraceae fungi dominated, with a main clade that likely originated in the Upper Cretaceous anddiversified in the Miocene. Two other arbuscular mycorrhizal fungal families not previously known to be targetedby A. uniflora were detected rarely and appear to be facultative associations. High genetic diversity, found inBolivia and both northern and southern Patagonia, was correlated with temperature, rainfall and soil features._ Conclusions Fungal genetic diversity and its distribution can be explained by the ancient evolutionary history ofthe target fungi and by micro-scale environmental conditions with a geographical mosaic pattern.