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Articles by A. Raza
Total Records ( 2 ) for A. Raza
  M.R. Ardakani , G. Pietsch , A. Moghaddam , A. Raza and J.K. Friedel
  Problem statement: It is generally considered that root turnover is a major contributor to organic matter and mineral nutrient cycles in organic managed agroecosystems. Approach: This study designed to investigate whether microbial activity could affect on root properties of Lucerne in an organically managed field under dry weather conditions. The trial was laid out as a factorial experiment in the fields of the University of Natural Resources and Applied Life Sciences, Vienna- Austria at Raasdorf in 2007. The experimental factors of Rhizobium (Sinorhizobium meliloti) and Arbuscular Mycorrhiza (AM) including Glomus etunicatum, G. intraradices and G. claroideum and irrigation levels were tested. Results: Results showed that increasing water deficit affected root dry weigh, specific root mass and root length significantly at 1% level and co-inoculation of rhizobium and mycorrhiza with irrigation increased all root parameters. Data’s of variance analysis for mycorrhizal colonization showed that main effect of using mycorrhiza had significant effects on root parameters at 5 and 1% probability level at first and second harvest, respectively. Results of mean comparisons by Duncan’s Multiple Range Test showed that mycorrhizal colonization was higher in the inoculated treatments by rhizobium, mycorrhiza and irrigated plots in both harvests. Double interaction of mycorrhiza and irrigation was higher in both harvests (37.05 and 65.73%, respectively). Conclusion: It can be suggested that the tripartite symbiosis of Rhizobium, AM and Lucerne can improve the performance of Lucerne in organic farming and under dry conditions. Such traits could be incorporated into breeding programs to improve drought tolerance especially in organic fields.
  M.R. Ardakani , S. Teimuri , M. Rezvani , H. Fathollahi , A. Khorasani , F. Rejali , A. Raza and F. Zafarian
  This study designed to investigate more precise of mycorrhizal symbiosis in order to increasing mineral absorption by plant root system. Three pot experiments, radioactive with 32P, non-radioactive and a trial with selected strain (from first and second trials) with heavy metals (Cd, Co and Pb) contaminated soil were set up for evaluation the efficacy of four mycorrhizae strains including Glomus mosseae, G. etanicatum, G. intraradices, mixed strains (combination of G. mosseae, Gigarpora hartiga and G. fasciculatum) in order to investigate the uptake, translocation and distribution of 32P, P and also dry matter in barely in a glass house. Radioactive phosphorus (32P) was used in this study. Results revealed that G. mosseae had the highest amount of P uptake in comparison with other strains. It indicates that differences exist among mycorrhizae strains towards 32P uptake and its transportation to shoot. Increased strain count of G. mosseae was found in contaminated pots in trial with contaminated soil along with higher P concentration in root and shoot than non-inoculated plant roots.
 
 
 
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