Legume growth promotion by Azospirillum brasilense

LARA STAR, MARTA SUSANA DARDANELLI, SUSANA M. CARLETTI, ENRIQUE A. RODRIGUEZ CACERES, YAACOV OKON.

Azul

Jornada; II Jornadas Microbiología de Suelos y IV Taller REDCAI; 2009

UNICEN

The rhizosphere is a highly dynamic open system with temporal and spatial changes of biotic (such as resulting from physiological and morphological changes of the growing root system) and abiotic (such as rain, irrigation, and drought) factors. Consequently it is difficult to understand the microbial adaptations to each particular situation. Rhizodeposition describes the total carbon transfer from plant roots to soil and comprises exudates (small molecules), secretions (macromolecules such as enzymes), lysates from dead cells, and mucilage. Rhizodeposition promotes microbial abundance and activities in the rhizosphere, which can therefore be described as the most active microbial habitat of the soil (Spaepen et al., 2009).