Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico

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 diameter of the root, and that rainfall also determines the presence of fresh, undigested pelotons. In very thin roots, mycorrhizal colonization occupies a considerable proportion of the cortex, whereas in thicker roots the proportion of the volume of the root cortex colonized is lower.

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Main Authors: Bertolini, Vincenzo Doctor 12617, Cruz Blasí, Jesús autor/a, Damon, Anne Ashby Doctora autor/a 2085, Valle Mora, Javier Francisco Maestro autor/a 10513
Format: Texto biblioteca
Language:eng
Subjects:Orquídeas, Epidendrum stamfordianum, Erycina crista-galli, Stelis quadrifida, Hongos micorrízicos, Rhizoctonia mycorrhizal, Artfrosur,
Online Access:http://www.scielo.br/pdf/abb/v28n4/04.pdf
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spelling KOHA-OAI-ECOSUR:48852024-02-21T12:27:23ZSeasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico Bertolini, Vincenzo Doctor 12617 Cruz Blasí, Jesús autor/a Damon, Anne Ashby Doctora autor/a 2085 Valle Mora, Javier Francisco Maestro autor/a 10513 textengOrchids 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 diameter of the root, and that rainfall also determines the presence of fresh, undigested pelotons. In very thin roots, mycorrhizal colonization occupies a considerable proportion of the cortex, whereas in thicker roots the proportion of the volume of the root cortex colonized is lower.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 diameter of the root, and that rainfall also determines the presence of fresh, undigested pelotons. In very thin roots, mycorrhizal colonization occupies a considerable proportion of the cortex, whereas in thicker roots the proportion of the volume of the root cortex colonized is lower.Adobe Acrobat profesional 6.0 o superiorOrquídeasEpidendrum stamfordianumErycina crista-galliStelis quadrifidaHongos micorrízicosRhizoctonia mycorrhizalArtfrosurDisponible en líneaActa Botánica Brasilicahttp://www.scielo.br/pdf/abb/v28n4/04.pdfAcceso en línea sin restricciones
institution ECOSUR
collection Koha
country México
countrycode MX
component Bibliográfico
access En linea
En linea
databasecode cat-ecosur
tag biblioteca
region America del Norte
libraryname Sistema de Información Bibliotecario de ECOSUR (SIBE)
language eng
topic Orquídeas
Epidendrum stamfordianum
Erycina crista-galli
Stelis quadrifida
Hongos micorrízicos
Rhizoctonia mycorrhizal
Artfrosur
Orquídeas
Epidendrum stamfordianum
Erycina crista-galli
Stelis quadrifida
Hongos micorrízicos
Rhizoctonia mycorrhizal
Artfrosur
spellingShingle Orquídeas
Epidendrum stamfordianum
Erycina crista-galli
Stelis quadrifida
Hongos micorrízicos
Rhizoctonia mycorrhizal
Artfrosur
Orquídeas
Epidendrum stamfordianum
Erycina crista-galli
Stelis quadrifida
Hongos micorrízicos
Rhizoctonia mycorrhizal
Artfrosur
Bertolini, Vincenzo Doctor 12617
Cruz Blasí, Jesús autor/a
Damon, Anne Ashby Doctora autor/a 2085
Valle Mora, Javier Francisco Maestro autor/a 10513
Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico
description 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 diameter of the root, and that rainfall also determines the presence of fresh, undigested pelotons. In very thin roots, mycorrhizal colonization occupies a considerable proportion of the cortex, whereas in thicker roots the proportion of the volume of the root cortex colonized is lower.
format Texto
topic_facet Orquídeas
Epidendrum stamfordianum
Erycina crista-galli
Stelis quadrifida
Hongos micorrízicos
Rhizoctonia mycorrhizal
Artfrosur
author Bertolini, Vincenzo Doctor 12617
Cruz Blasí, Jesús autor/a
Damon, Anne Ashby Doctora autor/a 2085
Valle Mora, Javier Francisco Maestro autor/a 10513
author_facet Bertolini, Vincenzo Doctor 12617
Cruz Blasí, Jesús autor/a
Damon, Anne Ashby Doctora autor/a 2085
Valle Mora, Javier Francisco Maestro autor/a 10513
author_sort Bertolini, Vincenzo Doctor 12617
title Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico
title_short Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico
title_full Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico
title_fullStr Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico
title_full_unstemmed Seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast Mexico
title_sort seasonality and mycorrhizal colonization in three species of epiphytic orchids in southeast mexico
url http://www.scielo.br/pdf/abb/v28n4/04.pdf
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