Determination of Relationships Between Drought Resistance Parameters and Irrigation Regimes In Prunus mahaleb L. Rootstocks

Abstract

Determination of Relationships Between Drought Resistance Parameters and Irrigation Regimes In Prunus mahaleb L. Rootstocks İ. Kürşat ÖZYURT1* Yaşar AKÇA2 Oğuzhan AYDIN3 1Dr. Middle Black Sea Transitional Zone Agricultural Research Institute, Turkey.2Prof.Dr. Gaziosmanpaşa University, Faculty of Agriculture, Departman of Horticulture Turkey. 3Zir. Yük. Müh. Middle Black Sea Transitional Zone Agricultural Research Institute, Turkey.Abstract: In this study, the relationships between different irrigation regimes and drought resistance parameters were investigated in Prunus mahaleb L. Three Prunus mahaleb L. rootstocks genotypes with high rooting capacity and SL 64 clonal rootstock were used. Four different irrigation regimes were applied (I1= completing water deficient to field capacity, I2= 70% of I1 application, I3= 40% of I1 application, I4= 10% of I1 application) in drought tests. We found significant positive important relationships (correlation coefficient) between increased irrigation regimes and leaf area (0.606), plant length (0.585), plant diameter (0.584), chlorophyll a (0.485), chlorophyll b (0.613), total chlorophyll (0.532), pH (0.415), stomata diameter (0.558), stomata length (0.538), stomata number (0.856). It is found negative significant relationships between increased irrigation regimes and abscisic acid content (-0.344) and it is calculated insignificant relationships total sugar (-0.064) and total starch (0.008). Keywords: Drought stress, Correlation coefficient, Abscisic acid, Stoma [*] Corresponding author: e-mail