Interactions of Azospirillum spp. in soils: a review |
| |
Authors: | Y. Bashan |
| |
Affiliation: | (1) Environmental Microbiology, The Center for Biological research of the Northwest (CIB), La Paz, PO. Box 128, Baja California Sur 23000, Mexico e-mail: bashan@cibnor.mx, Fax: +52-112-54710/53625, MX |
| |
Abstract: | This review summarizes and discusses the current knowledge and the, as yet, unanswered questions on the interactions of Azospirillum spp. in bulk soil (but not in the rhizosphere). It contains sections on the isolation of these bacteria from tropical to temperate soils, and on their short- and long-term persistence in bulk soil. The interactions of these bacteria with soil particles and minerals such as clay, sand and Ca, and the effect of soil pH, soil redox potential, and the cation exchange capacity of the soil on them is demonstrated. Data is presented on the distribution of Azospirillum spp. in soils, on their production of fibrillar material essential for anchoring the cells to soil particles, on the effects of soil irrigation, and of external soil treatments, and on the effect of soil C and C used in bacterial inoculants on the cells. It shows that root exudates possibly govern bacterial motility in the soil. Finally, the effect of pesticide applications, the relationships with other soil microorganisms such as Bdelovibrio spp., Bradyrhizobium spp., and phages, and the potential use of a community-control model of Azospirillum spp. in soil and in the rhizosphere is suggested. Received: 11 November 1998 |
| |
Keywords: | Azospirillum Motility Plant-growth-promoting bacteria Root exudates Soil bacteria |
本文献已被 SpringerLink 等数据库收录! |
|