Two effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots

Combined forms of nitrogen negatively influence rhizobia-legume symbiosis. The effects of combined nitrogen are known for nodulation and dinitrogen (N2) fixation, but little is known about the effect on preinfection events. Here, we studied the effects of combined nitrogen on the adhesion of Rhizobi...

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Detalles Bibliográficos
Autores principales: Pérez Giménez, Julieta, Lodeiro, Aníbal Roberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Biología
Nitrate
Root exudate
Adhesion
Rhizobium
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/145276
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-145276
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Biología
Nitrate
Root exudate
Adhesion
Rhizobium
spellingShingle Ciencias Exactas
Biología
Nitrate
Root exudate
Adhesion
Rhizobium
Pérez Giménez, Julieta
Lodeiro, Aníbal Roberto
Two effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots
topic_facet Ciencias Exactas
Biología
Nitrate
Root exudate
Adhesion
Rhizobium
description Combined forms of nitrogen negatively influence rhizobia-legume symbiosis. The effects of combined nitrogen are known for nodulation and dinitrogen (N2) fixation, but little is known about the effect on preinfection events. Here, we studied the effects of combined nitrogen on the adhesion of Rhizobium etli to common bean (Phaseolus vulgaris L.) roots. When potassium nitrate (KNO3) or sodium glutamate was added to an incubation mixture of rhizobia and plants that were previously grown in nitrogen-free solution, rhizobial adhesion to roots was stimulated. However, the rhizobial adhesion to bean roots that were previously grown with 10 mM KNO3 was reduced by half. A fraction of the bean root exudates, which is thermolabile and has molecular mass larger than 12 kDa stimulated rhizobial adhesion, but this stimulatory activity was lost in root exudates obtained with 10 mM KNO3. Thus, the inhibition of symbiosis in response to combined nitrogen may be controlled by the plant at the preinfection stage as well.
format Articulo
Articulo
author Pérez Giménez, Julieta
Lodeiro, Aníbal Roberto
author_facet Pérez Giménez, Julieta
Lodeiro, Aníbal Roberto
author_sort Pérez Giménez, Julieta
title Two effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots
title_short Two effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots
title_full Two effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots
title_fullStr Two effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots
title_full_unstemmed Two effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots
title_sort two effects of combined nitrogen on the adhesion of rhizobium etli to bean roots
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/145276
work_keys_str_mv AT perezgimenezjulieta twoeffectsofcombinednitrogenontheadhesionofrhizobiumetlitobeanroots
AT lodeiroanibalroberto twoeffectsofcombinednitrogenontheadhesionofrhizobiumetlitobeanroots
bdutipo_str Repositorios
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