Effect of Gibberellic Acid Pulsing and Sucrose Continuous Treatment on Some Qualitative Characteristics of Cut Rose Flower cv. Velvet

محورهای موضوعی : مجله گیاهان زینتی

Zahra Ahmadi ¹ (Graduated student of MSc. degree of Horticultural Sciences, Faculty of Agriculture, University of Tabriz.)
Rahim Naghshiband Hassani ² (Assistant Professor, Department of Horticulture Sciences, Faculty of Agriculture, University of Tabriz)

تاریخ دریافت : 1393/12/20 تاریخ پذیرش : 1394/04/20 تاریخ انتشار : 1394/06/17

کلید واژه: Vase life, plant growth regulators, Carbohydrate, Cut rose, water uptake,

چکیده مقاله :

The aim of this study was the better assessment of the relationship ofpulsing treatment of gibberellic acid as an anti-senescence agent and holdingin sucrose as a carbohydrate supply resource on improving some qualitativeand physiological attributes of cut rose flower cv. Velvet. Hence, anexperiment involving the pulsing treatment with gibberllic acid (GA3) at 0,20, 40 and 60 mg L-1, for 24 hours, and holding them in sucrose at 0, 2 and3% with 250 mg L-1 of 8- HQS as an antimicrobial agent for all holdingtreatments was conducted. The study was performed as a factorial experimentbased on a randomized completely design (RCD) with three replication foreach combination treatment. Applying GA3 pulse treatment alone at all concentrationsincreased significantly vase life and its effect enhanced withsucrose holding at 2 and 3% compared with control. The effect of GA3pulsing in increasing of stem relative fresh weight (RFW) and solutionuptake (SU) was hastened by sucrose holding treatment at 2 and 3%.Highest amount of flower opening and petal water content during vase lifeperiod was observed in 60 mg L-1 of GA3 pulsing and sucrose 3% holdingtreatment which had been longer flower diameters and greater petals.Gibberellic acid pulsing alone and along with sucrose holding treatment atall concentrations caused to prevention of leaf chlorophyll degradationcompared with control. In conclusion, GA3 pulsing at 40 mg L-1 along withsucrose 2% holding treatment had a significant effect on improving vase lifeand other qualitative attributes of cut rose flower cv. Velvet.

چکیده انگلیسی:

هدف از انجام تحقیق حاضر ارزیابی بهتر ویژگ یهای کیفی و فیزیولوژیکی گل شاخبریده رز رقم ’ولوت‘ به دنبال انجام تیمار پالسی اسید جیبرلیک به عنوان یک عامل ضد پیری ونگهداری آن در محلول گلجایی حاوی ساکارز به عنوان منبع کربوهیدرات بود. آزمایش شامل40 و 60 ، تیمار پالسی گل شاخه بریده رقم مذکور با اسید جیبرلیک در غلظ تهای صفر، 20می لیگرم در لیتر به مدت 24 ساعت و نگهداری آ نها در محلول ساکارز در غلظ تهای صفر، 2 و3 درصد همرا با غلظت 250 می لیگرم در لیتر از ماده ضد میکروبی 8- هیدروک سیکینول ینسولفاتبود. این تحقیق به شکل آزمایش فاکتوریل در قالب طرح کاملا تصادفی با سه تکرار برای هرترکیب تیماری اجرا گردید. تیمار پالسی اسید جیبرلیک در هر سه غلظت به تنهایی موجبافزایش معن یدار عمر گلجایی شاخ هها نسبت به تیمار شاهد گردید و اثر این تیمار در افزایشعمر گلجایی به دنبال نگهداری در محلو لهای 2 و 3 درصد ساکارز بیشتر از تیمار شاهد بود.اثر تیمار پالسی جیبرلیک اسید در افزایش مقادیر وزن تر نسبی شاخه و جذب محلول به دنبالنگهداری شاخ هها در محلو لهای 2 و 3 درصد ساکارز تشدید شد. بالاترین میزان باز شدگی گلو رطوبت گلبرگ طی دوره عمر گلجایی در غلظت 60 می لیگرم در لیتر اسید جیبرلیک و 3 درصدساکارز که دارای بیشترین میزان شکوفایی گل و گلبر گهای درشت تر بودند مشاهده گردید.تیمار پالسی اسید جیبرلیک در هر سه غلظت به تنهایی و همراه با تیمار نگهداری ساکارز درهر دو غلظت موجب جلوگیری از روند تخریب کلروفیل در بر گهای شاخه در مقایسه با تیمارشاهد گردیدند. بطور کلی، تیمارپالسی اسید جیبرلیک در غلظت 40 می لیگرم در لیتر همراه بامحلول نگهداری ساکارز 2 درصد اثر معن یداری در بهبود عمر گلجایی و سایر ویژگ یهای کیفیگل شاخه بریده رز رقم ’ولوت‘ داشتند.

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