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ANTIOKSIDATIVNI ODGOVOR U LISTU JAGODA (Fragaria x ananassa Duch) NA TRETMANE BIOSTIMULATORIMA UZ REDUCIRANU GNOJIDBU DUŠIKOM I KALIJEM

By Marija Špoljarević, Ivna Štolfa, Miroslav Lisjak, Aleksandar Stanisavljević, Tomislav Vinković, Dejan Agić, Nada Parađiković, Tihana Teklić, Meri Engler and Katica Klešić

Abstract

Strawberry cultivar Elsanta was grown in peat based substrate in a green house. Full dose and 50% reduced nitrogen and potassium fertilization were applied during fruit bearing period in spring, along with biostimulators Viva®, Megafol® and their combination. The specific activities of guaiacol peroxidase (GPXs; EC 1.11.1.7), catalase (CATs; EC 1.11.1.6), ascorbate peroxidase (APXs; EC 1.11.1.11) and glutathione reductase (GRs; EC 1.6.4.2) in strawberry leaf were stimulated by biostimulators and reduced fertilization. The strongest link seen here was between the enzymes of ascorbate-glutathione cycle (APXs and GRs), which were positively related to trifoliate leaf fresh mass (TLFM). The highest TLFM was observed in Megafol® treated plants.Sorta jagoda Elsanta uzgajana je u tresetnom supstratu u plasteniku. Puna doza i 50% smanjena doza dušika i kalija primjenjene su tijekom proljetnoga plodonošenja, uz primjenu biostimulatora Viva®, Megafol® i njihove kombinacije. Specifične aktivnosti gvajakol peroksidaze (GPXs; EC 1.11.1.7), katalaze (CATs; EC 1.11.1.6), askorbat peroksidaze (APXs; EC 1.11.1.11) i glutation reduktaze (GRs; EC 1.6.4.2) u listu jagode bile su značajno više poslije tretiranja biostimulatorima i reduciranom gnojidbom. Najjača povezanost uočena u ovom istraživanju, bila je između enzima askorbat-glutation ciklusa (APXs i GRs), koji su bili u pozitivnoj korelaciji s masom svježega lista (TLFM). Najveća masa svježega lista (TLFM) uočena je na biljkama tretiranim Megafolom®

Topics: antioxidative activity; ascorbate peroxidase; biostimulators; catalase; fertilization; Fragaria x ananassa Duch; glutathione reductase; guaiacol peroxidase; leaf; strawberry, antioksidativna aktivnost; askorbat peroksidaza; biostimulatori; katalaza; gnojidba; Fragaria x ananassa Duch; glutation reduktaza; gvajakol peroksidaza; list; jagoda
Publisher: The Faculty of Agriculture in Osijek and Agricultural Institute Osijek
Year: 2010
OAI identifier: oai:hrcak.srce.hr:53787

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