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Artículo

Does mycorrhizal colonisation vary between maize and sunflower under limitations to radiation source or carbohydrate sink?

Covacevich, FernandaIcon ; Martínez Verneri, Julieta; Dosio, Guillermo Aníbal AdriánIcon
Fecha de publicación: 10/2018
Editorial: Csiro Publishing
Revista: Crop & Pasture Science
ISSN: 1836-0947
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Agricultura

Resumen

The aim of this work was to analyse and compare indigenous arbuscular mycorrhizal colonisation (AMC) in relation to growth and total soluble carbohydrates (TSC) in two major, physiologically contrasting crop species: maize (Zea mays L.) and sunflower (Helianthus annuus L.). In order to promote contrasting TSC concentrations, we modified the radiation source by shading and the carbohydrate sink by manipulating reproductive sinks at different phenological stages during the grain-filling period in two field experiments. We assessed plant dry matter, TSC in stems, and root AMC from flowering until final harvest. AMC during the grain-filling period decreased in maize and increased in sunflower. A sink limitation increased AMC in maize, and reduced it in sunflower. A source limitation decreased AMC in both species, especially in sunflower. AMC was positively related to TSC in maize, but negatively in sunflower. The relationship was affected by shading in sunflower, but not in maize. In both species, a different linear model described the relationship between AMC and TSC in plants submitted to the removal of the reproductive organs. The results highlight the role of carbohydrates in mediating mycorrhizal formation, and show for the first time the opposite AMC–TSC relationships in maize and sunflower.
Palabras clave: agronomy , annual crops , endophytes , soluble carbohydrates
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/88286
URL: http://www.publish.csiro.au/?paper=CP17340
DOI: http://dx.doi.org/10.1071/CP17340
Colecciones
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Articulos(INBIOTEC)
Articulos de INSTITUTO DE INV. EN BIODIVERSIDAD Y BIOTECNOLOGIA
Citación
Covacevich, Fernanda; Martínez Verneri, Julieta; Dosio, Guillermo Aníbal Adrián; Does mycorrhizal colonisation vary between maize and sunflower under limitations to radiation source or carbohydrate sink?; Csiro Publishing; Crop & Pasture Science; 69; 10; 10-2018; 974-984
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