The effect of rootstocks on the peel phenolic compounds, cartenoids, chlorophylls and ethylene of Younesi tangerine (Citrus reticulata).
Subject Areas : Phytochemistry
1 - Department of Horticulture, Islamic Azad University, Roudehen Branch, Roudehen, Iran
Keywords: carotenoids, ethylene, citrus rootstocks, Younesi tangerine, phenolic compounds,
Abstract :
Studies have demonstrated that phenolic compounds andcarotenoids are essential for prevention of diseases. On the other hand,endogenous ethyleneenhancestheripeningof fruitsand stimulatesthe biosynthesis of carotenoidsas well aschlorophylls destruction. The aim of this study was to evaluate the effect of rootstocks on phenolic compounds andcarotenoids. The contents of individualphenolic compoundsin peel were evaluated by HPLC. Total flavonoids content was determined using colorimetric assay. Free radical activity was evaluated with DPPH reagent, and total carotenoid and chlorophylls contents were measured using a spectrophotometer. The content of ethylenein fruits was determined by Gas chromatography. HPLC analysis identified seven phenolic compounds in the peel of Younesi tangerine. Hesperidin was the major compound for all rootstocks. Among the six rootstocks studied, flying dragon demonstrated thehighest level of phenolic compounds, carotenoids, and ethylene. Findings suggest that the rootstocks can affect the amount of phenolic compounds, carotenoids, and ethylene of the fruit.