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

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

Mendoza

Congreso; XXXIV Reunión Científica Anual de la Sociedad de Biología de Cuyo; 2016

The evolution of horticulture in recent years has recorded a reduction in acreage but an increase in intensiveproduction based on the incorporation of technological innovations, mainly associated with biofertilization. The aimof this study was to analyze the germination response of tomato, lettuce, radish and chicory to the application ofextracts from the alga Macrocystis Pyrifera individually, or together with Azospirillum brasilense inoculation, toassess whether both types of promoters exert a synergistic action on the germination energy (GE) and thegermination power (GP). Seeds from the four horticultural species were inoculated and placed on germination trays(50 seeds per tray and 4 trays per treatment) in growth chamber (Conviron PR48) with controlled conditions : 80%relative humidity, 16 h light / 8 h dark photoperiod and of 24 and 20° C respectively, in triplicate. GE and GP weredetermined according to ISTA rules. Germination kinetics was also determined. The results showed a positive effectof the combined use of both biofertilizers on the germination parameters in some species, mainly on lettuce, in whichco-inoculation produced significant differences. In other species germination was mainly stimulated by the algalextract alone. These results suggest that the use of algal extract individually or in combination with PGPR may beused as bio-fertilizers in horticultural species but taking into account that each species responds to each fertilizer in aparticular way. The use of biofertilizers is of great importance in horticulture, to replace chemical agents for a moresustainable food production.