SYMBIOTIC NITROGEN FIXATION PERFORMANCE SCREENING OFR. MEL/LOT/ISOLATES FROM SALINE SOIL AGAINST DIFFERENT VARIETIES OF ALFALFA PLANTS IN TWO TYPES OF SOIL . | ||||
| Journal of Agricultural Chemistry and Biotechnology | ||||
| Article 3, Volume 30, Issue 7, July 2005, Page 4183-4193 PDF (838.55 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jacb.2005.235844 | ||||
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| Authors | ||||
| Elham EI-Khatib1; Amal A. Helm2 | ||||
| 1Agric. Res. Microblo!. Dept., Soils, Water and Environ., Res. Inst., Agric. Res. Center (ARC), Giza, Egypt. | ||||
| 2Field Crop Res.lnst., Agrlc. Res. Center (ARC),Glza, Egypt | ||||
| Abstract | ||||
| Two laboratory and greenhouse experiments were conducted to study the efficiency of six Rhizobium meutot; isolates (2. 4. 11. 12 and 15) and strain ARC·1 isolated from witd alfalfa plants of salt affected soil to symbiotic performance with 5 varieties alfalfa (Medicago sativa) plants (Ismailia 1. Ismailia 2, Nitrogen fixers, Diablo and EI.Wady EI-gedid): in two soli types. The results showed that, all isolates withstand high concentration of NaCI more than strain ARC-1. Isolate No.15 was the most resistant one to 7.5% NaCI and different antibiotics concentration. The data of symbiotic parameters showed that. the highest values of nodules number, nodules dry weight and N2-ase activity on plant roots were found with plants inoculated with slrein ARC-1 in two soil types. Also isolate No. 12 recorded the highest shoots dry weight and N-conlent in two soils. The superior interactions were found between ARC·1 and Ismailia 1 for nodulation status and isolate No. 12 and Nitrogen fixers variety for shoot dry weight and N-content. | ||||
| Keywords | ||||
| Salinity, Atfalfa (Medica go sativa), Rhizobium melilol; Symbiotic nitrogen fixation | ||||
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