Impact of Exogenous Spermine Application on the Vase Life of Cut Rose Flowers ‘Dolce Vita’
محورهای موضوعی : مجله گیاهان زینتیHamideh Ghorbani 1 , Asghar Ebrahimzadeh 2 , Bagher Eftekhari Sis 3 , Mohammad Bagher Hasanpouraghadm 4
1 - Former MSc. Student, Department of Horticultural Sciences, University of Maragheh
2 - Assistant Professor, Department of Horticultural Sciences, University of Maragheh
3 - Associate Professor, Department of Chemistry, University of Maragheh
4 - 4Associate Professor, Department of Horticultural Sciences, University of Maragheh
کلید واژه: Electrolyte leakage, Malondialdehyde, Polyamines, water uptake, Antiperoxidative, Climacteric flowers,
چکیده مقاله :
Senescence is an integral part of the normal developmental cycle of plants and can be traced in cell, tissue and organ level. This work was focused on the efficiency of post-harvest treatment with the free polyamine spermine (Spm) to extend the vase life of cut rose flowers as an anti-senescence compound. Spm treatment was applied at the rates of 0, 1, 2 and 4 mM. Some morphological, biochemical and physiological characteristics of tested cut roses (Rosa hybrida cv. ‘Dolce Vita’) such as; flower diameter, water uptake, relative fresh weight, electrolyte leakage, malondialdehyde content, guiacole peroxidase activity, hydrogen peroxide content and vase life were evaluated. The effects of a pulsing application of the polyamine on the mentioned traits were significant and treatment with Spm effectively delayed the senescence of roses, especially when applied at 4 mM concentration. Polyamine treatment resulted in a notable decrease in petal electrolyte leakage due to its cationic and anti-peroxidative characters. In addition to the anti-ethylene property, the cationic character of polyamines may play an important role in determining the vase life of cut flowers.
پیری بخش جدایی ناپذیر چرخه نمو گیاهان میباشد و میتواند در سطح سلول، بافت و اندام اثرگذار باشد. پژوهش حاضر بهمنظور مطالعه کارایی تیمار پس از برداشتی پلی آمین آزاد اسپرمین به عنوان یک ترکیب ضد پیری جهت افزایش عمر گلجایی گلهای شاخه بریده رز انجام شد. تیمار اسپرمین در غلظتهای صفر، ۱، ۲ و ۴ میلیمولار به کار رفت. ویژگیهای مورفولوژیکی، بیوشیمیایی و فیزیولوژیکی گلهای رز رقم ’دلس ویتا‘ همچون قطر گل، جذب آب، وزن تر نسبی، نشت الکترولیتی، میزان مالون دی آلدهید، فعالیت آنزیم گایاکول پراکسیداز، میزان پراکسید هیدروژن و عمر گلجایی مورد ارزیابی قرار گرفتند. تاثیر کاربرد پلی آمین به صورت تیمار کوتاه مدت (پالس) بر روی صفات ذکر شده معنیدار بوده و تیمار توسط اسپرمین خصوصا با کاربرد تیمار در غلظت ۴ میلیمولار به طور مؤثری فرآیند پیری را در گلهای رز به تعویق انداخت. تیمار پلی آمین به واسطهی خاصیت کاتیونی و آنتی پراکسیداتیو خود منتج به کاهش قابلتوجهی در نشت الکترولیت گلبرگها گشت. علاوه بر خاصیت ضد اتیلنی پلیآمینها ویژگی کاتیونی بودن آنها نیز ممکن است که در تعیین عمر گلجایی گلهای شاخه بریده نقش مهمی داشته باشد.
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