Beneficial effects of native phosphate solubilizing bacteria on peanut (Arachis hypogaea L) growth and phosphorus acquisition

ANZUAY, MARÍA SOLEDAD ; LUDUEÑA, LILIANA MERCEDES; ANGELINI, JORGE GUILLERMO ; FABRA, ADRIANA ; TAURIAN, TANIA

SYMBIOSIS

SPRINGER

Lugar: Berlin; Año: 2015 vol. 66 p. 89 - 97

0334-5114

Abstract: This study analyses the effect of inoculation of nativephosphate solubilizing bacteria on peanut (Arachishypogaea L.) growth and phosphorus acquisition. Peanutplants were inoculated individually with 18 native phosphatesolubilizing bacteria in microcosm studies using a low contenP soil from the producing area. Survival of inoculated bacteriain soil at the end of the experiment was determined by streakingserial dilutions of dry soil samples and subsequent repfingeringanalysis of the colonies. The ability of peanut plantsto increase P levels without bacteria was determined in hydroponicculture. The results obtained indicated that inoculationof native phosphate solubilizing bacteria on peanut seedlingsled to an increase in at least one of the plant growth parametersanalyzed. The beneficial effect of bacteria inoculation wasmainly observed in aerial organs of peanut plants.Inoculation of Serratia sp. J260, Enterobacter sp. J33,Acinetobacter sp. L176, Enterococcus sp. L185,Enterococcus sp. L191 and Bacillus sp. L55 on peanut plantsled to an increase in plant or soil P content. Plant assay inhydroponic conditions indicated that peanut plants growingwith tricalcium phosphate were able to release soluble P intothe growth medium reaching values similar to those of plantsgrowing with available P. The beneficial effects of the bacteriaanalyzed in this study and their ability to survive encourage usto consider them for the production of a potential Pbioinoculantfor peanut crops.