Azospirillum-Plant Interaction | Azospirillum-Plant Interaction: from Root Colonization to Plant Growth Promotion
2014
Wisniewski-Dye, Florence | Drogue, Benoit | Prigent Combaret, Claire | Laboratoire d'Ecologie Microbienne - UMR 5557 (LEM) ; Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Ecole Nationale Vétérinaire de Lyon (ENVL)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)
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Show more [+] Less [-]English. Bacteria of the genus Azospirillum (alpha-proteobacteria) have been known for many years as plant growth-promoting rhizobacteria (PGPR) (Döbereiner and Day 1976). These free-living nitrogen-fi xing highly motile bacteria can be isolated from the rhizosphere of many grasses and cereals under tropical and temperate climates (Döbereiner et al. 1976, Patriquin et al. 1983). Azospirilla are predominantly surface-colonizing bacteria, whereas other diazotrophs such as Azotobacter diazotrophicus, Herbaspirillum seropedicae and Azoarcus sp. are endophytic; only a few Azospirillum strains are able to penetrate roots (Baldani et al. 1986, Assmus et al. 1995), probably via localized enzymatic degradation of plant cell wall or via root cracks.
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