جستجوی مقالات مرتبط با کلیدواژه "sinorhizobium" در نشریات گروه "اکولوژی"

Water deficit stress limits agriculture crop production. Plant growth-promoting rhizobacteria (PGPR) play an important role in control of water deficit stress. Today, for improving of plant tolerance to stress and the production of healthy crops, the application of biofertilizers, including growth-promoting bacteria, is interest. The present study investigates the effects of two different PGPRs (Pseudomonas fluorescens and Sinorhizobium meliloti) on some physiological and morphological characteristics in fenugreek under water deficit stress. For this purpose, a factorial design based on randomized complete block design with four water deficit levels (100%, 80%, 60% and 40% FC) and four PGPR condition as control, Sinorhizobium meliloti, Pseudomonas fluorescens and combination of S. meliloti. and P. fluorescens with three replications were carried out. Irrigation treatments were applied after flowering of plants until harvesting. The results showed that leaf area, shoot and root fresh and dry weight, phosphorus and potassium content, and water use efficiency (WUE) were significantly improved by PGPR inoculation and individual use of PGPR was more effective, whereas seed yield was decreased in PGPR treated plants.

Nowadays, the use of soil-born microorganisms as biological fertilizers is considered to be a natural and most desirable solution used to maintain sustainability of agricultural soil system. Potassium releasing, nitrogen fixing and phosphate solubilizing bacteria play role in providing K, N and P to plants. In order to evaluate the effects of biofertilizers Potabarvar2 and Sinorhizobium meliloti, on physiological properties and yield of Fenugreek, a complete randomized block experiment was conducted with five treatments and three replications. Treatments included biofertilizer Potabarvar2, Sinorhizobium meliloti, inoculation with a mixture of Sinorhizobium㺋婭ꫯ檽, positive control (based on soil analysis) and negative control (no fertilization and inoculation). Physiological and morphological characteristics and concentrations of N, P and K were measured after harvest. The results showed significant effect of Sinorhizobium on morphological characteristics except internode length. Symbiotic relationship of Sinorhizobium with Fenugreek increased the uptake of nitrogen and phosphorus, however the highest potassium uptake observed with a mixture of Sinorhizobium㺋婭ꫯ檽.

Nowadays, the use of soil-born microorganisms as biological fertilizers is considered to be a natural and most desirable solution to maintain sustainability of agricultural soil system. Potassium releasing bacteria, nitrogen fixing and phosphorus dissolving bacteria make mentioned elements available to plants. In order to evaluate the effects of bio-fertilizers Potabarvar 2, Sinorhizobium meliloti, as well as urea fertilizer on physiological properties and yield of Fenugreek, an experiment as complete randomized block design was conducted with five treatments and three replications. Treatments included biofertilizer Potabarvar 2, S. meliloti, inoculation with a mixture of Sinorhizobium㺋婭ꫯ 2, positive control (based on soil analysis) and negative control (no fertilization and inoculation).The results showed that all morphological traits were significant at 1%. Most physiological traits except for carotenoid were significantly affected by S. meliloti, and a mixture of Sinorhizobium㺋婭ꫯ 2. Seed inoculation with biofertilizer Sinorhizobium meliloti and Potabarvar 2 lead to increase in growth and eventually shoot yield. Separate application of these biofertilizers led to better results than the integrated application. Symbiotic relationship of Sinorhizobium with Fenugreek increased physiological indices data, especially the absorption of nitrogen and phosphorus, as well as the amount of phenolic antioxidant have been significantly affected. In general, application of S. meliloti resulted in better and more effective increase in yield, quality and plant growth than fertilizer Potabarvar 2 and a mixture of Sinorhizobium㺋婭ꫯ 2.