Articles
THE PHOTOSYNTHETIC ACTIVITY AND EVALUATION OF FRUIT QUALITY IN SEVEN FIG CULTIVARS (FICUS CARICA L.)
Article number
940_48
Pages
341 – 348
Language
English
Abstract
The study was carried out on five-year-old trees grown in the orchard of the Agricultural University of Athens.
The cultivars studied were Kymis, Fracasana, San Pedro and Politiko (white cultivars) and Vasilika Black, Vasilika Melia and Mission (black cultivars). The rate of CO2 assimilation (Pn) and stomatal conductance (gs) were measured using a portable infra-red gas analyser.
Fruit diameter and weight, fruit skin colour and firmness, pH and acidity, soluble sugar concentrations (by HPLC) and total soluble solids (TSS) were measured to evaluate fruit quality.
Pn and gs significantly differed among cultivars. San Pedro and Vasilika Black showed the highest values while Politiko the lowest.
The mean fresh weight and fruit diameter were greater in Politiko and Kymis, while Fracasana had the smallest value.
Fruit firmness was least in Vasilika Black and highest in Politiko. Juice acidity was similar in Fracasana, San Pedro and Vasilika Melia with much higher pH values than the other cultivars.
Glucose, fructose and sucrose were the main soluble sugars found in mature fruits of all cultivars: glucose concentration was the highest in all cultivars followed by fructose, and sucrose at much lower concentrations. Fracasana and San Pedro had higher total soluble sugar concentrations than the other cultivars, while TSS was higher in Kymis and Mission. Pn was significantly linearly correlated with gs (r=0.724), and the total sugar concentrations in fruits (r=0.383), while total sugar concentrations were significantly correlated with TSS (r=0.311). San Pedro was the earliest maturing cultivar, followed by Mission and Politiko, while the latest maturing was Vasilika Melia.
The cultivars studied were Kymis, Fracasana, San Pedro and Politiko (white cultivars) and Vasilika Black, Vasilika Melia and Mission (black cultivars). The rate of CO2 assimilation (Pn) and stomatal conductance (gs) were measured using a portable infra-red gas analyser.
Fruit diameter and weight, fruit skin colour and firmness, pH and acidity, soluble sugar concentrations (by HPLC) and total soluble solids (TSS) were measured to evaluate fruit quality.
Pn and gs significantly differed among cultivars. San Pedro and Vasilika Black showed the highest values while Politiko the lowest.
The mean fresh weight and fruit diameter were greater in Politiko and Kymis, while Fracasana had the smallest value.
Fruit firmness was least in Vasilika Black and highest in Politiko. Juice acidity was similar in Fracasana, San Pedro and Vasilika Melia with much higher pH values than the other cultivars.
Glucose, fructose and sucrose were the main soluble sugars found in mature fruits of all cultivars: glucose concentration was the highest in all cultivars followed by fructose, and sucrose at much lower concentrations. Fracasana and San Pedro had higher total soluble sugar concentrations than the other cultivars, while TSS was higher in Kymis and Mission. Pn was significantly linearly correlated with gs (r=0.724), and the total sugar concentrations in fruits (r=0.383), while total sugar concentrations were significantly correlated with TSS (r=0.311). San Pedro was the earliest maturing cultivar, followed by Mission and Politiko, while the latest maturing was Vasilika Melia.
Authors
E. Pisimisi, S.N. Vemmos, E. Mili
Keywords
Pn rates, soluble sugars, total soluble solids, acidity, fruit firmness, fruit weight, fruit colour
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