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BACKGROUND Tomatoes of different types and cultivars are grown in different parts of the world. Accordingly, the phenological, pomological and biochemical characteristics of these types and cultivars may differ from each other, and therefore their ripening behaviours may also differ. The present study aimed to determine the respiration rate and ethylene production of twelve commonly grown cultivars in Turkey at harvest and during the ripening stage. The fruits were harvested at the mature green stage and categorized according to their size as small, medium and large‐fruited cultivars. RESULTS At harvest time, the highest respiration rate was determined from ‘Moda’ (small‐fruited) cultivar and the lowest was from ‘Elips’ (medium‐fruited). The highest ethylene production was determined from ‘Sarikiz’ (small‐fruited) and the lowest was from ‘Alberty’ (large‐fruited). All tomato cultivars examined in the study showed climacteric respiration behavior during the ripening, and it was determined that small‐fruited types had a higher respiration rate and ethylene production compared to medium and large‐fruited ones. ‘Sarikiz’ (small‐fruited) had the highest climacteric peak and ‘Gulpembe’ (large‐fruited) had the lowest. Moreover, it was determined that the respiration rate of small‐fruited cultivars were 5.01‐fold higher compared to other cultivars and this type of cultivars produced 4.19‐fold higher ethylene compared to big‐fruited cultivars at harvest. Medium‐fruited tomatoes had 1.90‐fold higher respiration rate and 1.64‐fold ethylene production compared to big‐fruited tomatoes. CONCLUSION It was determined that fruit size and respiration rate were related independently of the cultivars, although there was no relationship between fruit size and ethylene production. © 2022 Society of Chemical Industry.

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The aim of this study was to investigate the effects of 1.5, 3.0 and 4.5 kJ/m2 UV-C illumination doses on the postharvest quality of fresh fig (cv. Bursa Siyahi). For this purpose, fruit were stored at 0 ºC temperature with 90-95% humidity for 21 days and some fruits were kept at 20 °C for 3 days to simulate a period of shelf-life. UV-C treatments did not affect fruit firmness, total soluble solids, and titratable acidity content during cold storage and shelf-life. On the other hand, UV-C doses increased total phenolic content and antioxidant activity compared to control. In both storage conditions, 3.0 and 4.5 kJ/m2 UV-C doses were found to be more effective to control unmarketable fruit rate. In conclusion, a 4.5 kJ/m2 UV-C illumination dose can be effective in maintaining the postharvest quality of fresh fig fruit harvested at a 2/3 maturity stage.

In this study, beefsteak (cv. 'Tybif'), heirloom (cv. 'Yuksel Koy') and cluster types (cv. 'Merkur') of tomato were harvested at breaker stage of maturity and stored at 20ºC temperature and 60±5% relative humidity for comparing their ethylene production, respiration rate, postharvest performance and nutritional characteristics. Analysis for weight loss, antioxidant activity, carotenoid, flavonoid, total phenolics, ascorbic acid contents, ethylene production, respiration rates and amount of unmarketable fruits were determined during 21 days of storage. Weight loss, ethylene production, respiration rate, carotenoid content and amount of unmarketable fruits exhibited increase whereas flavonoid and ascorbic acid content showed decrease with extending storage duration. Maximum antioxidant activity, carotenoid, total phenolics and ascorbic acid contents and minimum weight loss, ethylene production and respiration rate were noted in beefsteak type of tomatoes. Based on results obtained it can be concluded that beefsteak type of tomatoes can be successfully stored with maximal nutritional quality for 21 days of storage as compared to heirloom and cluster types of tomatoes.