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Saeed Mahmoodi Tabar,Ali Tehranifar,Gholam Hossein Davarynejad,Seyed Hossein Nemati,Hamid Reza Zabihi 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.4
Aril paleness disorder causes the quality depletion of pomegranate fruits. The objective of our work was to determine circumstance of physicochemical changes during the exposure of aril paleness disorder. Disordered fruits were monitored in the 131st days of fruit set. Disordered fruits showed a significant (P ≤ 0.05) difference from intact fruits in fruit density, juice percentage, phenolic compounds, polymeric anthocyanins, titratable acidity, and total soluble solids in the 131st days of fruit set. The fruit density, juice percent, ascorbic acid, phenolic compounds, and titratable acidity decreased 2.91, 13.52, 27.46, 21.48, and 4.22%, respectively, faster than those in intact fruits. Peel percent, dry matter of juice, acidity, total soluble solids and total sugars increased 2.59, 8.13, 3.67, 5.7, and 4.85%, respectively, faster than those in intact fruits. Monomeric anthocyanins increased (200 ㎎/100 g) up to the 159th days of fruit set in intact fruits, followed by decreased 16% up to the 173rd days of fruit set. Disordered fruits showed 70% depletion in monomeric anthocyanins up to the 173rd days of fruit set. Polymeric anthocyanins increased 14.3 and 59.3% in intact fruits and disordered fruits, 14.3 and 59.3%, respectively. Both intact and disordered fruits showed 21.9 and 23.162% increase in protein up to the 159th days of fruit set, followed by a steady state in their rate of accumulation. Physical and chemical properties in both fruits showed no significant changes during the late harvest date (the 166th and 173rd days of fruit set). Exceptions to this general pattern were total soluble solids and dry matter of disordered fruit juice in which increased significantly.
Ali Tehranifar,Saeed Mahmoodi Tabar 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.3
The aim of this work was to evaluate the effects of different concentrations of K and B foliar application on fruit quality parameters of pomegranate fruit (Punica granatum). To achieve this objective, in 2007 a trial was carried out in a pomegranate orchard located in Ferdows region, Iran. The plants were sprayed with three K (0, 1.5, and 3 gㆍL?¹ potassium metalosate) and three B (0, 1.5, and 3 gㆍL?¹ H3BO3) concentrations, in a complete randomized design with three replications; spraying was replicated three times during fruit development stage. Foliar application of K and B significantly increased the content of K and B in the leaf (P ≤ 0.01), and peel and juice of fruit (P ≤ 0.05). The fruits of trees fertilized at the highest K concentration had higher titratable acidity and total soluble solids than those in the other treatments. Foliar K application at 1.5 and 3 gㆍL?¹ significantly (P ≤ 0.05) increased the content of anthocyanins, phenolic compounds, and antioxidant activity of fruit juice. Application of K at 3 gㆍL?¹ alone decreased the fruit firmness significantly, while the spraying of B at 3 gㆍL?¹ increased the fruit firmness significantly. Content of ascorbic acid increased significantly with increasing of K concentrations and the highest content of ascorbic acid observed in the treatment of combination of K and B at high concentration. Foliar B application significantly (P ≤ 0.05) increased the peel percentage of fruits, while it decreased significantly (P ≤ 0.05) the juice percentage. K application at 3 gㆍL?¹ alone and with combination of B applications showed the highest significant content of total sugar content. Electrolyte leakage of fruit peel decreased significantly (P ≤ 0.05) by foliar K application compared with no K fertilizer application.