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Effect of isolated indigenous PGPR and chemical fertilizers on growth and productivity of pepper (Capsicum annuum cv Calafyuco INTA)
Foz do Iguaçu
Simposio; XVI Symposium on Biological Nitrogen Fixation with Non-Legumes, IV LatinAmerican Workshop of PGPR, XIX RELARE; 2018
The excessive use of fertilizers has shown a negative impact on crop productivity, soil and water contamination, together with enhanced crop susceptibility to diseases. The inoculation of crops with plant growth promoting rhizobacteria (PGPR) might also help to overcome these problems by diminishing fertilizers utilization. Pepper (Capsicum annum L) is the most popular of fresh vegetables worldwide due to its combination of color, flavor, and nutritional value. The aim of this work was to study the effect of inoculation with different indigenous PGPR (25X1, 64S1, 53F, 42P4, 60I1) isolated from Solanum licopersicum crops on germination, growth, and yield of pepper cultivar Calafyuco INTA. 1) We evaluated speed and percentage of germination of seeds in petri dishes inoculated with five strains of PGPR or with water (negative control). 2) Twenty five-days-old seedlings grown in chamber growth (12 h of photoperiod,100 μmol m?2 s?1, 24±2ºC) were inoculated with the five PGPR strains or not (negative control without bacteria) or fertilized with Red Hakaphos® Base (N-P-K, 18:18:18, positive control). In forty five-days-old seedlings, the height, root and shoot dry weight (DW) were evaluated. Then, seedlings were transplanted to plastic pots filled with sterile soil and transferred to greenhouse (natural photoperiod, Temp 24±2ºC). Treatments were arranged in a completely randomized design. Height, root and shoot DW, foliar area and fruit number were determined. Only the strain 60I1 increased the speed of germination and plant growth. All PGPR strains increased plant height, roots and shoots DW as compared with the negative control. Strikingly, PGPR inoculation equaled control fertilized effects on growth and production (p