%0 Journal Article
%T Mycotrophy in Gilliesieae, a threatened and poorly known tribe of Alliaceae from central Chile Micotrof¨ªa en Gilliesieae, una tribu amenazada y poco conocida de Alliaceae de Chile central
%A GUSTAVO A TORRES-MELLADO
%A INELIA ESCOBAR
%A GOTZ PALFNER
%A M. ANG¨¦LICA CASANOVA-KATNY
%J Revista chilena de historia natural
%D 2012
%I Springer
%X The five known genera of Gilliesieae have their diversity center in the Mediterranean zone of central Chile, where many of their habitats are threatened by urban expansion, industrial and agroforestry activities, as well as other anthropogenic impacts. Very little is known about the biology of these particular geophytes, the majority of which currently have either vulnerable or endangered status, mainly due to their dispersed and small populations generally associated to remnants of native vegetation. As mycorrhizal associations are essential for soil resource acquisition and stress mitigation in most plants, our objective was to assess the hitherto unknown mycotrophic status of ten species of Gilliesieae from central Chile by qualitative and quantitative assessment of intraradical fungal structures. All sampled genera (Gethyum, Gilliesia, Miersia, Solaria, Speea) showed regular presence of arbuscular mycorrhiza, while other mycorrhizal or putatively mutualistic associations, like dark septate endophytes, were practically absent. Mycorrhizal colonization of fine roots reached a mean of ca. 45 % across all examined taxa, with highly variable values ranging from 9 % to 82 % in Miersia tenuiseta and Gilliesia curicana, respectively. The high level of mycorrhization indicates that arbuscular mycorrhiza should be considered for conservation strategies of threatened species or biotechnological use in plant propagation. The main future task is the identification of the associated fungal taxa. Los cinco g¨¦neros conocidos de Gilliesieae tienen su centro de diversidad en la zona mediterr¨¢nea de Chile central, donde muchos de sus h¨¢bitats est¨¢n amenazados por la expansi¨®n urbana, actividades industriales y agroforestales, as¨ª como otros impactos antropog¨¦nicos. Se sabe muy poco sobre la biolog¨ªa de estas particulares ge¨®fitas, que en la actualidad tienen en su mayor¨ªa estatus de vulnerable o en peligro de extinci¨®n, debido a sus poblaciones dispersas y pequenas, generalmente asociadas a remanentes de vegetaci¨®n nativa. Dado que las asociaciones micorr¨ªcicas son esenciales para la adquisici¨®n de recursos del suelo y para la mitigaci¨®n de estr¨¦s en la mayor¨ªa de las plantas, nuestro objetivo fue determinar el estatus micotr¨®fico a¨²n desconocido de diez especies de Gilliesieae de Chile central, mediante an¨¢lisis cualitativos y cuantitativos de las estructuras f¨²ngicas intrarradicales. Todos los g¨¦neros evaluados (Gethyum, Gilliesia, Miersia, Solaria, Speea) mostraron la presencia regular de micorrizas arbusculares, mientras que otras asociaciones micorr¨ªcicas o asoci
%K clima mediterr¨¢neo
%K especies amenazadas
%K Glomeromycota
%K Monocotyledoneae
%K transecto latitudinal
%K endangered species
%K Glomeromycota
%K latitudinal transect
%K Mediterranean climate
%K Monocotyledoneae
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000200004