REDUCTION OF Mn TOXICITY TO SOYBEA BY Bradyrhlzobium japonicum | ||||
| Journal of Agricultural Chemistry and Biotechnology | ||||
| Article 1, Volume 28, Issue 6, June 2003, Page 5005-5009 PDF (713.15 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jacb.2003.244693 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. Nour. EI-Dein; Fatma A. Sherif; Dawlat Abadi | ||||
| Soli, Water and Environmental Res. Inst., Agric. Res. Cent., Giza, Egypt. | ||||
| Abstract | ||||
| Two preliminary experiments were conducted to investigate the effect of Mn concentrations on the performance of soybean in two different soil types induce activation and those which are harmful to soybean plants and Bradyrhizobiu japonicum cells in the first experiment sequential concentrations of Mn (from zero to 500 ppm) to clay soil planted wilh soybean in small pots. The second one carried out oy addition of some selected Mn concentratlens resuued from the first experirnent (zero, 100, 500, 1000, 2500, 3000 and 5000 ppm) to "asks containing yeast mannitol medium, then inoculated with Bradyrhizobium japonicum (5t 110) cells. In the main pot experiment clay and calcareous soils were used. A sequential concentrations 0 Mn were added to both soils (zero, 300, 500, 1000 and 2000 ppm) In presence or absence of rhlzobial inoculation. The results indicated that all Mn concentrations had no obvious significant effects on germination % and natality %. EmbryoniC intemod and snoot length were significanUy increased till concentrations .,00 and 1500 ppm for each respectively. Viable counts of rhizobial cells significantly increased due to low Jevels of Mn (100 and 500 ppm), but heavily significant decHnes were recorded when concentrations above 500 ppm were applied. Rhlzobial inoculaUon significantly increased seed yield and most of other growth parameters. Soil types neither affects crop yield nor P and K contents of seeds. Plants which were grown in clay soil exhibited an increase in N- content than In calcareous soil. NOdules had no consistent effects due to increasing Mn levels. While N·contenl of plants significanUy declined. K-content exhibited nearly similar trend. However, P-content generally did not affected. In the clay soil, all Mn concentrations {ill 1000 ppm did not significantly affect seed yield or Inoculated plants but a significant increase was observed at 2000 ppm. In calcareous soil, the addition of manganese caused non- Significant decrease in seed yield, Inoculation with rhizobia obviously decreased Mn uptake by plant in both soil types. | ||||
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