Effect of isolated indigenous PGPR and chemical fertilizers on growth and productivity of pepper (Capsicum annuum cv Calafyuco INTA)

LOBATO URECHE, MIGUEL; PÉREZ RODRIGUEZ, MARÍA MICAELA; PICCOLI, PATRICIA; COHEN, ANA CARMEN

Foz Iguazú

Congreso; XVI Symposium on Biological nitrogen fixation with non-legumes IV Latinoamerican Workshop of PGPR. XIX RELARE; 2018

Embrapa

Effect of isolated indigenous PGPRand chemical fertilizers on growth andproductivity of pepper (Capsicum annumcv Calafyuco INTA)Lobato-Ureche, M1; Pérez-Rodriguez, M1; Piccoli, P1; Cohen, AC1*1IBAM-FCA (CONICET-UNCUYO). Almirante Brown 500, (5505) Chacrasde Coria, Mendoza, Argentina (acohen@fca.uncu.edu.ar).The excessive use of fertilizers has shown anegative impact on crop productivity, soil andwater contamination, together with enhanced cropsusceptibility to diseases. The inoculation of crops withplant growth promoting rhizobacteria (PGPR) mightalso help to overcome these problems by diminishingfertilizers utilization. Pepper (Capsicum annum L) is themost popular of fresh vegetables worldwide due to itscombination of color, flavor, and nutritional value. Theaim of this work was to study the effect of inoculationwith different indigenous PGPR (25X1, 64S1, 53F,42P4, 60I1) isolated from Solanum licopersicum cropson germination, growth, and yield of pepper cultivarCalafyuco INTA. 1) We evaluated speed and percentageof germination of seeds in petri dishes inoculated withfive strains of PGPR or with water (negative control).2) Twenty five-days-old seedlings grown in chambergrowth (12 h of photoperiod,100 mol m?2 s?1, 24±2ºC)were inoculated with the five PGPR strains or not(negative control without bacteria) or fertilized with RedHakaphos® Base (N-P-K, 18:18:18, positive control). Inforty five-days-old seedlings the height, root and shootdry weight (DW) were evaluated. Then, seedlings weretransplanted to plastic pots filled with sterile soil andtransferred to greenhouse (natural photoperiod, Temp24±2ºC). Treatments were arranged in a completelyrandomized design. Height, root and shoot DW, foliararea and fruit number were determined. Only the strain60I1 increased the speed of germination and plantgrowth. All PGPR strains increased plant height, roots andshoots DW as compared with the negative control. PGPRinoculation equaled control fertilized effects on growthand production (p