Poljoprivreda (Jun 2010)

STRAWBERRY (FRAGARIA X ANANASSA DUCH) LEAF ANTIOXIDATIVE RESPONSE TO BIOSTIMULATORS AND REDUCED FERTILIZATION WITH N AND K

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

Journal volume & issue
Vol. 16, no. 1
pp. 50 – 56

Abstract

Read online

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.

Keywords