@article { author = {Asgareyan, Zahra Sadat and Sayyari, Mohammad and Asnaashari, Mahmood}, title = {Effect of UV-C radiation on alleviating chilling injuries of persimmon fruit cv. Kashan during cold storage}, journal = {Plant Productions}, volume = {42}, number = {2}, pages = {181-194}, year = {2019}, publisher = {Shahid Chamran University of Ahvaz}, issn = {2588-543X}, eissn = {2588-5979}, doi = {10.22055/ppd.2019.18805.1367}, abstract = {Effect of UV-C radiation on alleviating chilling injuries of persimmon fruit cv. Kashan during cold storageAbstractBackground and objectivesWith increasing interest for developing the cultivation of persimmon, there is not suitable technology and enough information about postharvest behavior and storability of this fruit in many of countries such as Iran. Softening, chilling injury and the incidence of different diseases are limiting factors for postharvest life of persimmons fruits during cold storage. Ultraviolet-C (UV-C) light radiation has recently suggested to controlling decay and reducing chilling injury of some fruits. Therefore, this study was conducted to evaluate the effects of UV-C treatments with different doses on alleviating chilling injuries and maintaining qualitative attributes of persimmon fruits during storage.Materials and methodsThe persimmon fruits cv. `Kashan´ were harvested from a commercial orchard near Kashan city. UV-C treatments was carried out at 0 (as control), 5 minutes irradiation from 15 and 30 cm distance with 3.2 and 0.8 kJm-2, and 10 minute irradiation from 15 and 30 cm distance with 16.4 and 4.1 kJm-2. After 1, 2, 3 and 4 months, fruits were removed from storage and chilling injury indices, polyphenol oxidase (PPO) activity and some quality attributes were measured. ResultsThe effect of UV-C treatments on weight loss, chilling index, electrolyte leakage, lipid peroxidation and PPO activity was effective during storage. High percent of weight loss (6.84) and chilling symptom (40) was observed in irradiated fruits with 16.43 kJm-2 and low level of mentioned parameters was seen in 3.2 kJm-2 treatment. High level of electrolyte leakage (80.49) and lipid peroxidation (1.78 nM g-1 FW) were detected in treated fruits with 4.1 and 16.43 kJm-2 and low level of above parameters were observed in non-treated and treated fruits with 3.2 kJm-2. Application of UV-C with high dose increased PPO activity (9.7 u gr-1 FW) in comparison to other treatments during storage. DiscussionOur results suggest that application of UV-C irradiation in low level after harvest could increase postharvest life of `Kashan´ persimmon by controlling chilling injuries and preserving fruit quality. However, it is worth mentioning that chilling symptoms of persimmon was reduced by low doses of UV –C irradiation. In fact, UV-C treatment with high doses caused high percentage of injured fruits. In conclusion, the use of UV-C radiation in controlling chilling injuries and maintaining quality of persimmons fruits offers an interesting research area and considering the low risk of the treatments.}, keywords = {Chilling index,Polyphenol oxidase,Malondialdehyde content,Electrolyte leakage}, title_fa = {اثر پرتودهی با نور فرابنفش C بر کاهش سرمازدگی میوه خرمالو رقم کاشان طی انبارمانی}, abstract_fa = {چکیدهدر این مطالعه اثر پرتودهی نور فرابنفش C در شدت صفر (به‌عنوان شاهد)، 5 دقیقه پرتودهی از فاصله 15 و 30 سانتی‌متری به‌ترتیب با شدت 2/3 و 8/0 کیلوژول بر مترمربع و 10 دقیقه پرتودهی از فاصله 15 و 30 سانتی‌متری به‌ترتیب با شدت 4/16 و1/4 کیلوژول بر مترمربع بر کاهش سرمازدگی و حفظ شاخص‌های کیفی خرمالو رقم کاشان در انبار طی سال‌های 1394 و 1395 و در دانشگاه بوعلی سینا مورد بررسی قرار گرفت. نتایج نشان داد که پرتودهی روی کاهش وزن، شاخص سرمایی، نشت الکترولیت، پراکسیداسیون لیپید و فعالیت پلی فنل اکسیداز در طول دوره انبارمانی مؤثر بود. بیشترین درصد کاهش وزن (84/6) و شاخص سرمایی (40) در میوه‌های پرتوتابی‌شده با 4/16 کیلوژول بر مترمربع مشاهده شد و سطح پایین پارامترهای ذکر‌شده در تیمار 2/3 کیلوژول بر مترمربع دیده شد. سطح بالای نشت الکترولیت (49/80) و پراکسیداسیون لیپید (78/1 نانو مول بر گرم وزن ‌تر) در میوه‌های تیمار‌شده با 1/4 و 4/16 کیلوژول بر مترمربع مشاهده شد و نیز سطح پایین پارامترهای ذکر‌شده در میوه‌های تیمار‌نشده و تیمار‌شده با 2/3 کیلوژول بر مترمربع به‌دست آمد. کاربرد پرتو  فرابنفش C با دزهای بالا فعالیت پلی فنل اکسیداز (7/9 واحد بر گرم وزن ‌تر) را در مقایسه با دیگر سطوح کاربردی پرتو فرابنفش C افزایش داد. با توجه به نتایج به دست آمده استفاده بعد از برداشت پرتو فرابنفش C در سطح پایین می‌تواند عمر پس از برداشت خرمالوی کاشان را با کنترل علائم آسیب سرمایی و حفظ کیفیت میوه افزایش دهد.}, keywords_fa = {پلی فنل اکسیداز,شاخص سرمایی,مالون دی‌آلدئید,نشت‌یونی}, url = {https://plantproduction.scu.ac.ir/article_14626.html}, eprint = {https://plantproduction.scu.ac.ir/article_14626_9608dec05fc0b808e4d0e256886713af.pdf} }