Impacts of inoculation with Rhizobium leguminosarum and arbuscular mycorrhizae and phosphate on Vicia faba L. grown in salt stressed soil

摘要

Effects of AM (arbuscular mycorrhizae), Rhizobium and phosphate on the growth of Vicia faba L. (faba bean) grown under salinity stress have been studied. Rhizobium leguminosarum bv. viciae strains RCR 1044 and RCR 1001 mixed culture and AM fungus Glomus fasiculatum were inoculated in faba bean seeds. Fifty and 100 mM of NaCl concentrations and rock phosphate and super phosphate as phosphorus sources were used. Percentages of mycorrhizal colonization, nodulation, absolute nitrogenase activity, leghaemoglobin and sodium, potassium, nitrogen and phosphate were assessed. Mycorrhizal colonization of roots decreased by increasing salinity concentration. Mycorrhizal inoculation led to increase in nodule number, fresh and dry weight of nodules, nitrogenase activity and leghaemoglobin contents of nodules. In the presence of mycorrhizae, sodium content decreased, but nitrogen and phosphorus contents increased.