Comparison of Plant Growth Regulators and Exogenous Ethylene Effects on Two Types of Cut Carnation (Dianthus caryophyllus L.)
محورهای موضوعی : مجله گیاهان زینتی
Anita Ramtin
1
(Department of Horticultural Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Rohangiz Naderi
2
(Department of Horticultural Sciences, Faculty of Agricultural Sciences and Natural Resources, University of Tehran, Karaj, Iran)
Sepideh Kalatejari
3
(Department of Horticultural Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Mohammad Matinizadeh
4
(Department of Forest, Research Institute of Forest and Rangelands, Tehran, Iran)
کلید واژه: Senescence, Antioxidant, Longevity,
چکیده مقاله :
The main object of this study is to investigate the effect of plant growth regulators on the prolongation of vase life of two kinds of cut carnation under normal and ethylene. Carnation is one of the most popular flowers that has a short life due to its sensitivity to ethylene. Also, the effect of plant growth regulators on several physiological traits under ethylene stress and normal conditions was studied. The effects of short-term treatment with benzyl adenine, salicylic acid, and methyl jasmonate on two types of cut carnations (Dianthus caryophyllus L.), one-headed standard cut carnation and multi- flower mini cut carnation, under exposure of ethylene condition were investigated. Benzyl adenine 100 µM short-term treatment had the most effect on total chlorophyll content. Salicylic acid 100 µM treatment enhanced the soluble carbohydrates, and also prolonged the cut carnation vase life. Methyl jasmonate 400 µM treating elevated the catalase and peroxidase enzymes activity and increased the proline content in cut carnations. All considered traits were reduced by exogenous ethylene. None of short-term treatments could repel the inappropriate exogenous ethylene effects. One-headed standard carnations were also tolerant of ethylene more than multi- flower mini carnations.
هدف اصلی این مطالعه، بررسی تأثیر استفاده از تنظیم کننده­های رشد گیاهان بر طول عمر گلجایی دو نوع گل بریده میخک در حالت نرمال و تحت تنش اتیلن می­باشد. میخک یکی از پرطرفدارترین گل­هایی است که به علت حساسیت به اتیلن دارای عمر گلدانی کمی است اثر تنظیم کننده­های رشد گیاه بر چندین ویژگی فیزیولوژیک تحت تنش اتیلن و شرایط طبیعی مورد مطالعه قرار گرفت. اثرات تیمار کوتاه مدت با بنزیل آدنین، سالیسیلیک اسید و متیل جاسمونات بر روی دو نوع میخک (Dianthus caryophyllus L.) استاندارد و میخک کوچک چند گل، در معرض شرایط اتیلن مورد بررسی قرار گرفت. تیمار کوتاه مدت با بنزیل آدنین 100 میکرومولار بیشترین تاثیر را بر کلروفیل کل داشت وتیمار با 100 میکرومولار اسید سالیسیلیک باعث افزایش کربوهیدرات­های محلول و همچنین افزایش طول عمر گلجایی گل بریده گردید. متیل جاسمونات 400 میکرومولار باعث افزایش فعالیت آنزیم کاتالاز و پراکسیداز شده و میزان پرولین را در میخک­های بریده افزایش می­دهد. تمام صفات در نظر گرفته شده توسط استعمال اتیلن خارجی کاهش یافت و هیچ یک از تیمارهای کوتاه مدت تنظیم­کننده­های گیاهی نتوانست اثرات نامناسب اتیلن خارجی را از بین ببرد. میخک­های استاندارد نیز نسبت به استعمال اتیلن مقاوم­تر ازمیخک­های کوچک چند گل بودند.
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