Rhizobium meliloti competitiveness and the alfalfa agglutinin
نویسندگان
چکیده
منابع مشابه
Growth and Movement of Spot Inoculated Rhizobium meliloti on the Root Surface of Alfalfa.
Inoculum droplets of approximately 10 nanoliter volume and containing about 10 Rhizobium meliloti cells were placed onto the root surface of alfalfa seedlings in plastic growth pouches at either the root tip, the position of the smallest emergent root hairs, or at a site midway between these points. The droplets were initially confined to an area of about 0.2 square millimeter at the point of a...
متن کاملInvolvement of Salicylic Acid in the Establishment of the Rhizobium meliloti–Alfalfa Symbiosis
F. Martínez-Abarca,1 J. A. Herrera-Cervera,1 P. Bueno,2 J. Sanjuan,1 T. Bisseling,3 and J. Olivares1 Departamento de Microbiología del Suelo y Sistemas Simbióticos; Departamento de Bioquímica y Biología Molecular y Celular de Plantas, Estación Experimental del Zaidín, CSIC, Profesor Albareda, 1. 18008 Granada, Spain; Department of Molecular Biology, Wageningen Agricultural University, 67034A Wa...
متن کاملCryptic plasmid and rifampin resistance in Rhizobium meliloti influencing nodulation competitiveness.
An assessment was made of the relative contributions of a spontaneous mutation to rifampin resistance and a cryptic plasmid, pTA2, to competitive nodulation of Medicago sativa by a strain of Rhizobium meliloti. This was facilitated by use of rifampin-resistant derivatives of this strain in which pTA2 was originally present, cured, or reintroduced. Both curing of pTA2 and spontaneous mutation to...
متن کاملHost-Symbiont Specificity Expressed during Early Adsorption of Rhizobium meliloti to the Root Surface of Alfalfa.
Early (4 h) adsorption of Rhizobium meliloti L5-30 in low numbers to alfalfa roots in mineral solution was examined for competition with other bacterial strains. All tested competitor strains decreased the adsorption of L5-30 by extents which depended on the strain and its concentration. The decrease of adsorption by R. meliloti competitors (all of them infective in alfalfa) was nearly complete...
متن کاملAlfalfa (Medicago sativa L.) Root Exudates Contain Isoflavonoids in the Presence of Rhizobium meliloti.
Root exudates of alfalfa (Medicago sativa L.) inoculated with symbiotic Rhizobium meliloti bacteria contained three isoflavonoids that were not found in exudates of uninoculated plants. Data from proton nuclear magnetic resonance, mass spectrometry, and ultraviolet-visible absorbance analyses indicated that root exudates of inoculated plants contained aglycone and glycoside forms of the phytoal...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1984
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.157.3.703-707.1984