LAUSR

In order to achieve sustainable agriculture, this study intended to investigate the effects of biological growth stimulants on physiological traits and yield of potato (Solanum tuberosum L.) in minituber production system in Iran. Seedlings potato from Agria cultivar, which were produced by tissue culture, were treated with eight biological growth stimulants containing Pseudomonas fluorescence, Bacillus subtilis, mycorrhiza (Glomes mosseae) and combine them and then cultivated in appropriate bed at the completely randomized design in a greenhouse condition. Based on the results, using fungal and bacterial growth stimulants could improve plant growth and increased biomass, plant height, chlorophyll content of the leaf and minituber yield of potato. The most effective treatment was combination of mycorrhiza fungi+pseudomonas+bacillus bacteria with 3.81 kg/m2 minituber production in comparison with control treatment (2.06 kg/m2). Synergic effect of fungi and bacteria improved minituber production. Meanwhile reduced dependence of plant on chemical inputs; therefore, these results can be advisable to achieve sustainable agriculture.