RubisCO enzyme activity in wheat varieties under salinity conditions

Abstract

The RubisCO enzyme activity was studied in wheat cultivars exposed to salinity. Four Cuban varieties of wheat species T. aestivum and T. durum were selected and mounted two experimental variants in hydroponic conditions. He saline the first treatment with NaCl to a conductivity of 8 dS.m-1 in the nutrient solution, while in the control treatment (no applied NaCl for all cases) the pH of the solution was adjusted to 6.0. Treatments were applied from the time of planting to 35 days after seed germination when the determinations were made. As a result a significant decrease in RubisCO enzyme activity was obtained in all varieties in saline, where there were highly significant differences compared to the control treatment. Affectations than 10 % due to salinity were found. Wheat varieties of the species T. durum always occurred in the control treatment increased enzyme activity of RubisCO but the intensity of stress was higher in this species so it showed increased sensitivity to salinity compared to T. aestivum.

Keywords

• RubisCO
• wheat
• salinity