INVESTIGADORES
RAPISARDA Viviana Andrea
congresos y reuniones científicas
Título:
CONTRIBUTION OF GLUCONACETOBACTER DIAZOTROPHICUS PAL5 TO PHOSPHORUS NUTRITION IN STRAWBERRY PLANTS
Autor/es:
DELAPORTE-QUINTANA, P.; GRILLO-PUERTAS, M.; LOVAISA, N. C.; RAPISARDA, V. A.; PEDRAZA, R. O.
Lugar:
Córdoba
Reunión:
Congreso; LII Annual Meeting of SAIB (Argentine Society for Biochemistry and Molecular Biology); 2016
Institución organizadora:
SAIB
Resumen:
Intensive strawberry crop production requires the use of phosphate fertilizers to cover deficiencies of soluble phosphorus (P) in soil. Gluconacetobacter diazotrophicus, a plant growth promoting bacteria, is able to solubilize phosphates through a non-phosphorylating extracellular oxidative pathway, which oxidizes glucose to gluconic and 2-ketogluconic acids. It has been demonstrated in our laboratory that G. diazotrophicus PAL5 can solubilize phosphate from different sources. The aim of this work was to analyze if PAL5 contributes to P nutrition in strawberry plants. Plants were grown in sterile substrate and watered with nutrient solution in the absence of P and with the addition of soluble or insoluble P. After 20 days, plants grown with insoluble P were inoculated with PAL5. Plants incubated in the absence of P presented dwarfism, low dry weight, growth index and P content; dark green leaves; and poor root development. A similar deficient phenotype was observed with insoluble P. Conversely, plants incubated with soluble P or insoluble P and PAL5 had high dry weight, growth index and P content; big, vigorous and light-green leaves; and abundant roots. Beneficial effects were achieved even if bacteria were inoculated after the appearance of deficiency symptoms. In conclusion, PAL5 contributes to P nutrition in strawberry plants by improving growth in low available P medium.