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

dc.creatorPérez Giménez, Julieta
dc.creatorLodeiro, Aníbal Roberto
dc.date2013-02-13
dc.date2022-11-07T15:26:46Z
dc.date.accessioned2023-07-15T05:07:04Z
dc.date.available2023-07-15T05:07:04Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/145276
dc.identifierissn:0334-5114
dc.identifierissn:1878-7665
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7472150
dc.descriptionCombined 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.
dc.descriptionInstituto de Biotecnología y Biología Molecular
dc.formatapplication/pdf
dc.format157-163
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.subjectCiencias Exactas
dc.subjectBiología
dc.subjectNitrate
dc.subjectRoot exudate
dc.subjectAdhesion
dc.subjectRhizobium
dc.titleTwo effects of combined nitrogen on the adhesion of Rhizobium etli to bean roots
dc.typeArticulo
dc.typeArticulo


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