Combination of extracts froma algae Macrocystis pyrifera with bacteria PGPR stimulate germination of horticultural species

CORTES, JULIETA; IPARRAGUIRRE, JULIA; MASCIARELLI, OSCAR; REGINATO, MARIANA; LUNA, MARÍA VIRGINIA

BIOCELL

BIOCELL

Lugar: Mendoza; Año: 2016

The evolution of horticulture in recent years has recorded a reduction in acreage but an increase in intensive production based onthe incorporation of technological innovations, mainly associated with biofertilization. The aim of this study was to analyze thegermination response of tomato, lettuce, radish and chicory to the application of extracts from the alga Macrocystis Pyriferaindividually, or together with Azospirillum brasilense inoculation, to assess whether both types of promoters exert a synergisticaction on the germination energy (GE) and the germination power (GP). Seeds from the four horticultural species were inoculatedand placed on germination trays (50 seeds per tray and 4 trays per treatment) in growth chamber (Conviron PR48) with controlledconditions : 80% relative humidity, 16 h light / 8 h dark photoperiod and of 24 and 20° C respectively, in triplicate. GE and GPwere determined according to ISTA rules. Germination kinetics was also determined. The results showed a positive effect of thecombined use of both biofertilizers on the germination parameters in some species, mainly on lettuce, in which co-inoculationproduced significant differences. In other species germination was mainly stimulated by the algal extract alone. These resultssuggest that the use of algal extract individually or in combination with PGPR may be used as bio-fertilizers in horticulturalspecies but taking into account that each species responds to each fertilizer in a particular way. The use of biofertilizers is of greatimportance in horticulture, to replace chemical agents for a more sustainable food production