Effects of Silver Nanoparticles (SNPs) Pulsing Treatment and Sucrose Holding on Flower and Leaf Senescence of Cut Rose
محورهای موضوعی : مجله گیاهان زینتی
Khadijeh Alkasir
1
(Former student of MSc. of Horticultural Sciences, Department of Horticulture Sciences, Faculty of Agriculture, University of Tabriz, Iran)
Rahim Naghshiband Hassani
2
(Assistant Professor of Department of Horticulture Sciences, Faculty of Agriculture, University of Tabriz,Tabriz, Iran)
Alireza Motalebi Azar
3
(Associate Professor of Department of Horticulture Sciences, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.)
کلید واژه: Vase life, silver nanoparticles, Antimicrobial agents, Pulse treatment, Vascular occlusion,
چکیده مقاله :
This experiment was carried out to evaluate the effect of silver nanoparticles pulsing treatment (0, 25, 75 and 125 mg L−1) on vase life and some postharvest physiological parameters of cut rose flower ʻHigh & Magicʼ in sucrose solution (0, 2 and 3%). This research performed as a factorial experiment based on a completely randomized design with three replications under 23 ± 2 °C, 60 ± 5% RH and 12 µmol m−2 s−1 light intensity (cool white florescent tubes) under a daily light period of 12 h. Results showed that 125 mg L−1 silver nanoparticles without sucrose or with 2% sucrose had the lowest stem end bacteria. Pulse treatments with silver nanoparticles at all concentrations improved solution uptake, maintenance of the relative fresh weight, flower diameter and chlorophyll fluorescence ratio (Fv/Fm) as compared to control. The highest amount of flower opening with the largest flower diameter was observed in 75 mg L−1 pulsed silver nanoparticles with 2% sucrose solution on day 9 of vase period. Control flowers (deionized water) without or with 2% sucrose exhibited the shortest vase life. The concentrations of 75 and 125 mg L−1 with 2% sucrose or without it had the longest vase life as compared to other treatments.
این آزمایش برای ارزیابی اثر تیمار کوتاه مدت نانو ذرات نقره در غلظت­ های صفر، 4، 25، 75 و 125 میلی­ گرم در لیتر روی گل شاخه بریدنی رز رقم ʼهای اند مجیکʻ بدنبال نگهداری در محلول ساکارز با غلظت­ های صفر، 2 و 3 درصد از نظر عمر گلجایی و برخی از صفات فیزیولوژیکی پس از برداشت آن انجام شد. این تحقیق به شکل آزمایش فاکتوریل در قالب طرح کاملا تصادفی با سه تکرار برای هر تیمار اجرا شد. آزمایش تحت شرایط دمای 2 ± 23 درجه سانتی­گراد، رطوبت نسبی 5±60 درصد و با شدت نوری محیط 12 میکرو مول در مترمربع درثانیه به مدت 12 ساعت توسط لامپ­ های فلورسنت انجام شد. نتایج نشان داد که تیمار 125 میلی­ گرم در لیتر نانو ذرات نقره همرا با ساکارز دو درصد و بدون ساکارز بیشترین تاثیر را در کنترل باکتری­ های انتهای ساقه را داشت. تیمار کوتاه مدت نانو ذرات نقره در کلیه غلظت­ ها سبب بهبود جذب محلول، حفظ رطوبت نسبی شاخه، بهبود باز شدن گل و شاخص فلورسانس کلروفیل برگ (Fv/Fm) در مقایسه با تیمار شاهد گردید. بیشترین میزان باز شدگی گل با درشت­ترین اندازه گل در تیمار 75 میلی­ گرم در لیتر نانوذرات همراه با ساکارز 2 درصد در روز نهم عمر گلجایی مشاهده گردید. کمترین میزان عمر گلجایی در تیمارهای آب مقطر به تنهایی و همراه با ساکارز بود. بیشترین میزان عمر گلجایی در تیمارهای 75 و 125 میلی­ گرم در لیتر نانو ذرات نقره بدون ساکارز و با ساکارز در مقایسه با سایر تیمارها مشاهده گردید.
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