The Role of 1-methylcyclopropene (1-MCP) in Improving the Postharvest Quality of Some Cut Rose Cultivars
محورهای موضوعی : مجله گیاهان زینتی
Fahmy A.S. Hassan
1
(Professor of ornamental plants, Tanta University, Egypt)
کلید واژه: postharvest, Vase life, Rose, Membrane stability, ethylene, 1-MCP,
چکیده مقاله :
In order to improve the postharvest quality and the export ability of cut rose (Rosa hybrida L.) cvs. Happy Hour and Bordeaux, the effect of 1-methylcyclopropene (1-MCP) as an ethylene inhibitor, was investigated. 1-MCP was used at 0.3, 0.4, 0.5 and 0.6 g m-3 for 18 h at 8 °C to simulate the transport of flowers. 1-MCP treatment significantly prolonged the vase life and minimized the weight loss of both cultivars compared to the control, however the response of Happy Hour cultivar was higher than the Bordeaux cultivar. 1-MCP treatment enhanced the relative water content (RWC) of flowers. The treatment of 1-MCP significantly retarded the degradation of chlorophyll and carbohydrate contents during vase life evaluation in both cultivars. The ethylene production was significantly decreased by applying 1-MCP treatment. The membrane stability index (MSI) was maintained while malondialdehyde (MDA) was decreased in response to 1-MCP treatment. The best treatments in this concern were 1-MCP at 0.4 and 0.5 g m-3 for Happy Hour and Bordeaux cultivars, respectively. 1-MCP treatment was recommended to inhibit the negative effects of ethylene on rose cultivars tested.
به­منظور بهبود کیفیت پس از برداشت و پتانسیل صادرات گل بریده رُز (Rosa hybrida L.) ارقام ’هپی آور‘ و ’بوردو‘ اثر 1-MCP به­عنوان یک بازدارنده اتیلن تحت مطالعه قرار گرفت. غلظت­های 1-MCP عبارت بودند از: 3/0، 4/0، 5/0 و 6/0 گرم در متر مکعب که برای مدت 18 ساعت در دمای 8 درجه سانتی­گراد مشابه شرایط حمل و نقل گل­ها مورد آزمایش قرار گرفتند. تیمار 1-MCPدر مقایسه با شاهد، به­صورت معنی­داری عمر گلجایی را افزایش و کاهش وزن را در هر 2 رقم به حداقل رساند، البته پاسخ رقم ’هپی آور‘ نسبت به رقم ’بوردو‘ بهتر و بیشتر بود. تیمار 1-MCP مقدار نسبی آب (RWC) را نیز در گل­ها بهبود بخشید. 1-MCP به صورت معنی­داری تخریب کلروفیل و کربوهیدرات­ها را در طول عمر گلجایی در هر 2 رقم به تاخیر انداخت. تولید اتیلن به صورت معنی­داری توسط 1-MCP کاهش یافت. شاخص ثبات غشا (MSI) در پاسخ به 1-MCP حفظ شد و MDA کاهش یافت. بهترین تیمارها از این نظر به­ترتیب غلظت­های 4/0 و 5/0 برای ارقام ’هپی آور‘ و ’بوردو‘ بودند. تیمار 1-MCP برای ممانعت از اثرات منفی اتیلن روی این دو رقم رُز توصیه می­شود.
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