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Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico Acta Botanica
Bertolini,Vincenzo; Cruz-Blasi,Jesús; Damon,Anne; Mora,Javier Valle.
Orchids establish symbiosis with Rhizoctonia mycorrhizal fungi, forming the characteristic pelotons within the cells of the root cortex. Under natural conditions, terrestrial and epiphytic orchids have different levels of dependence upon the fungal symbiont, although various authors have mentioned that once orchid plants reach maturity the interaction becomes weaker and intermittent. Recent evidence shows that in some epiphytic orchid species mycorrhization is constant and systematic. In three species of wild orchids from southeast Mexico, we show that mycorrhization is systematically present in roots of different ages, in the wet and dry seasons. We demonstrate that the volume of the root that is colonized depends upon the quantity of rainfall and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epidendrum stamfordianum; Erycina crista-galli; Stelis quadrifida; Mycorrhization intensity.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400004
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