The effect of root exudates on root architecture in Arabidopsis thaliana

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Root architecture is of key importance for plant nutrition and performance. It is known that root architecture is determined by genetics and environmental conditions. The aim of the present study was to evaluate if root exudation within a given plant has a role in the development of root architectur...

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Detalles Bibliográficos
Otros Autores: Caffaro, María Marta, Vivanco, Jorge M., Gutiérrez Boem, Flavio Hernán, Rubio, Gerardo
Formato: Artículo
Lenguaje:Inglés
Materias:
ACTIVATED CHARCOAL
ARABIDOPSIS THALIANA
ROOT ARCHITECTURE
ROOT EXUDATES
SOIL EXPLORATION
ARABIDOPSIS
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2011Caffaro.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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520 |a Root architecture is of key importance for plant nutrition and performance. It is known that root architecture is determined by genetics and environmental conditions. The aim of the present study was to evaluate if root exudation within a given plant has a role in the development of root architecture. We conducted a series of experiments using Arabidopsis thaliana Ler and Col grown with and without activated charcoal [AC]. The addition of AC lowered the concentration of secondary metabolites in the growth media by more than 90 percent. Our results consistently showed that the addition of AC significantly decreased the number of lateral roots [38 percent in Ler and 27 percent in Col], but this decrease was compensated by an increase in the root length per unit of lateral root [83 percent in Ler and 96 percent in Col]. This compensation resulted in a non-significant effect of AC on the total length of lateral roots. The effects of AC on root architecture were partially or totally reverted by the differential supplementation of root exudates from other plants of the same ecotype. Our results indicate a direct role of secondary metabolites present in the root exudates in the development of root architecture. 
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