Rol de la acumulación de prolina en la calidad del fruto del pimiento (Capsicum Annum l.) Cultivado con compost rico en K y bajo condiciones de sequía

LOVATO MARIA EUGENIA ; ANTOLIN MARI CARMEN; FIASCONARO MARIA LAURA; GERVASIO SUSANA; ABRILE MARIANA

Cordoba

Congreso; XXXII Reunión Argentina / XVI Congreso Latinoamericano de FISIOLOGÍA VEGETAL; 2018

Sociedad Argentina de Fiosología Vegetal

Water availability is the most critical factor to grown and developmentof plants. The aim of thisstudy was to investigate the effect of soil amendmentof a K-rich carrot compost on pepper physiology and fruit quality under drought. Furthermore, an attempted to determine the influence of these combined factors on yield and quality pepper fruits. Carrot compost (ZC) was obtained by composting from carrot wastes and not presented phytotoxic substances that prevented germination and grown of pepper seedlings. When the vegetative stage corresponding to start of flowering was reached, half of the plants were subjected to drought conditions(moderate water stress). Results showed that the concentration of minerals, free proline, total phenols and main carotenoids in pepper fruits were significantly modified by water level and/or substrate type. Under drought, ZC35 (35% of ZC) treatment increased concentrations of minerals (mainly K) and phenols but decreased bcarotene and lycopene levels. Moreover, significant relationships between K content, phenolic compounds and free proline were highlighted. Overall, data suggest that the use of a K-rich carrot compost for growing pepper under drought could selectively modify plant metabolic activitiesthat areinvolved in the accumulation of carotenoids and phenolic compounds and thus, in fruit quality.