نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد علوم باغبانی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

2 استادیار گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

چکیده

به منظور بررسی اثر تیمار 1- متیلسیکلوپروپان و اتیلن بر حفظ کیفیت و افزایش عمر گلجایی گلهای میخک رقم ‘گرنداسلم’ آزمایشی در قالب طرح کاملاً تصادفی با سه تکرار در آزمایشگاه فیزیولوژی پس از برداشت دانشگاه تربیت مدرس در سال 93-1392 انجام شد. ابتدا گلهای شاخهبریدنی با چهار سطح صفر، 5/0، 1 و 5/1 میکرولیتر بر لیتر 1- متیلسیکلوپروپان به مدت 24 ساعت تیمار شدند و سپس به مدت 16 ساعت در معرض غلظت یک میکرولیتر بر لیتر اتیلن قرار گرفتند.تیمار 1- متیلسیکلوپروپان اثر معنی‌داری بر عمر گلجایی، ویژگی­های بیوشیمیایی و میزان فعالیت آنزیم‌های آنتی‌اکسیدانت داشت. بیشترین عمر گلجایی و مقدار کلروفیل برگ و آنتوسیانین‌های گلبرگ مربوط به تیمار یک میکرولیتر بر لیتر 1- متیلسیکلوپروپان بود، هرچند که با تیمار 5/1 میکرولیتر بر لیتر 1- متیل‌سیکلوپروپان تفاوت معنی‌داری نداشت. بیشترین فعالیت آنزیم پراکسیداز تحت تیمار 1- متیلسیکلوپروپان با غلظت یک میکرولیتر بر لیتر مشاهده شد، درحالی‌که بیشترین و کمترین فعالیت آنزیم کاتالاز و سوپراکسید دیسموتاز به‌ترتیب در تیمار 5/1 میکرولیتر بر لیتر و تیمار شاهد مشاهده شد. به‌طورکلی، نتایج تحقیق حاضر نشان داد که 1- متیل‌سیکلوپروپان به عنوان یک بازدارنده عمل اتیلن سبب افزایش عمر گلجایی و فعالیت آنزیم­های آنتی‌اکسیدانی در گل شاخه‌بریدنی میخک رقم ‘گرند اسلم’ گردید.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of 1-Methylcyclopropene (1-MCP) and Ethylene on physiological characteristics and antioxidant activities of cut carnation cv. ‘Grand Slam’

نویسندگان [English]

  • Azam Ranjbar 1
  • Nourollah Ahmadi 2

1 M.Sc. Former Student, Department of Horticultural Sciences, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

2 2Assistant Professor, Department of Horticultural Sciences, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

چکیده [English]

This research was conducted to evaluate the effects of 1-MCP and ethylene on extending the display quality and increasing vase life of cut carnation flowers in a completely randomized design with three replicationsat the laboratory of the postharvest physiology, Tarbiat Modares Universityin 2014. First, cut flowers were treated with 0, 0.5, 1 and 1.5 µl l-1 of 1-MCP for 24 h and then exposed to 1 µl l-1 ethylene for 16 h. The results showed that 1-MCP had significant effect on the physiological and biochemical characteristics and the activity of antioxidant enzymes. Maximum of vase life and the amount of chlorophyll and anthocyanin were revealed in samples treated with 1 µl l-1 1-MCP. Also, the highest peroxidase enzyme activity was observed in treatment of 1 µl l-1 1-MCP which had significant difference with other treatments. The highest and lowest catalase and superoxide dismutase activities were found in 1.5 µl l-1 1-MCP and control, respectively. In conclusion, 1-MCP treatment resulted in extending vase life and increasing activity of antioxidant enzymes in cut carnation cv. ‘Grand Slam’ by suppression of ethylene action.

کلیدواژه‌ها [English]

  • Chlorophyll
  • Peroxidase
  • Senescence
  • superoxide dismutase
  • Vase solution
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