Azospirillum effects on susceptibility to Rhizobium nodulation and on nitrogen fixation of several forage legumes
| Autor: | Eli Yahalom, Amos Dovrat, Yaacov Okon |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
Rhizobiaceae
biology Inoculation Immunology food and beverages General Medicine biochemical phenomena metabolism and nutrition Root hair Azospirillum brasilense biology.organism_classification Applied Microbiology and Biotechnology Microbiology Agronomy Genetics Nitrogen fixation Rhizobium Medicago polymorpha Molecular Biology Microbial inoculant |
| Zdroj: | Canadian Journal of Microbiology. 33:510-514 |
| ISSN: | 1480-3275 0008-4166 |
| Popis: | Azospirillum brasilense Cd cell concentration of 105–107 colony-forming units (cfu)/mL applied 24 h before Rhizobium (106 cfu/mL), increased nodule formation in the non root hair zone, more than twofold, in pouch-grown Medicagopolymorpha and Macroptilium atropurpureum seedlings, compared with Rhizobium alone. The increase in nodule formation in pouch-grown Trifolium alexandrinum following preinoculation with Azospirillum was 20%. The percentage of nodulated seedlings rose from 0 to 25% when Medicago polymorpha was preinoculated with Azospirillum followed by the application of 10 cfu/mL Rhizobium meliloti, a level which by itself was not sufficient to initiate nodule formation. Acetylene reduction activity in Medicago polymorpha and Macroptilium atropurpureum seedlings after inoculation with Azospirillum–Rhizobium was markedly increased. A possible reason for the increased susceptibility to Rhizobium infection may be that Azospirillum stimulates the formation of a larger number of epidermal cells that differentiate into infectable root hairs. |
| Databáze: | OpenAIRE |
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