Title Effects of Different Salinity Levels on Photosynthetic Performances of Some Citrus Rootstocks
Authors Berken ÇİMEN, Turgut YEŞİLOĞLU, Bilge YILMAZ, Meral İNCESU
Abstract Salinity continues to be a major environmental factor in the world and our country affecting fruit yield and quality of many fruit crops as in citrus. Thus determining new rootstocks alternatives to current citrus rootstocks which are tolerant to salinity has a great importance in terms of citriculture. In this study, salt stress tolerances of Sarawak bintangor, Shekwasha, Fuzhu and Cleopatra mandarin were determined by investigating photosynthetic parameters. Photosynthetic performances of those rootstocks were determined by assaying chlorophyll fluorescence (Fv’/Fm’), photosynthetic rate [μmol(CO2) m-2s-1], transpiration rate (mmol m-2s-1), stomatal conductance (mmol m-2s-1) and intercellular CO2 concentration [μmol (CO2) mol-1 (air)]. In order to generate salinity stress on plants 0, 50, 75 and 100 mM NaCl was added to a Hoagland nutrient solution modified for citrus. At the end of the experiment, significant salinity effect was determined on the photosynthetic performances of rootstocks. Photosynthetic rate of rootstocks was reduced by the increasing salinity levels. Leaves of Shekwasha yielded the highest chlorophyll fluorescence in 100 mM NaCl treatment whereas the lowest was obtained from leaves of Sarawak bintangor.
Keywords citrus, rootstock, salinity, photosynthesis, chlorophyll fluorescence
Journal TABAD - Research Journal of Agricultural Sciences
Issue Issue 2
Page 013-018
Year 2013
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