Factors affecting the attachment of rhizospheric bacteria to bean and soybean roots

. ALBAREDA, M.S. DARDANELLI, C. SOUSA, M. MEGÍAS, F. TEMPRANO, AND D. RODRÍGUEZ-NAVARRO.

FEMS MICROBIOLOGY LETTERS

Blackwell Publishing

Lugar: Delft; Año: 2006 vol. 259 p. 67 - 73

0378-1097

The plant rhizosphere is an important soil ecological environment for plant–microorganism interactions, which include colonization by a variety of microorganismsin and around the roots that may result in symbiotic, endophytic,associative, or parasitic relationships within the plant, depending on the type ofmicroorganisms, soil nutrient status, and soil environment. Rhizosphere competencemay be attributable to the differences in the extent of bacterial attachment tothe root surface. We present results of the effect of various factors on theattachment to bean (Phaseolus vulgaris) and soybean (Glycine max) roots of somebacterial species of agronomic importance, such as Rhizobium tropici, Rhizobiumetli, Ensifer fredii (homotypic synonym Sinorhizobium fredii), and Azospirillumbrasilense; as well as the attachment capability of the plant growth promotingrhizobacteria Pseudomonas fluorescens and Chryseobacterium balustinum. Additionally,we have studied various bacterial traits, such as autoaggregation andflagella movements, which have been postulated to be important properties forbacterial adhesion to surfaces. The lack of mutual incompatibility betweenrhizobial strains and C. balustinum has been demonstrated in coinoculation assays.