Biochemical and Physiological Responses of Tuberose (Polianthes tuberosa L.) Cut Flower to Silver Nanoparticles Treatment
محورهای موضوعی : مجله گیاهان زینتی
Keramatallah Mohammadi
1
(Department of Horticultural Sciences, Arak Branch, Islamic Azad University, Arak, Iran)
Saeid Chavoshi
2
(Department of Agronomy and Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran)
Hossein Ali Asadi-Gharneh
3
(Department of Horticulture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran)
Masoud Gomarian
4
(Department of Agronomy and Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran)
Behzad Edrisi
5
(Department of Horticultural Sciences, Arak Branch, Islamic Azad University, Arak, Iran|Ornamental Plants Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Mahallat, Iran)
کلید واژه: postharvest, Vase life, Sucrose, Antioxidant, nano-silver, <i>Polianthes tuberosa</i>,
چکیده مقاله :
Tuberose is an valuable ornamental plant with a high economic value, which is among the five leading cut flowers of the world. The major obstacle hindering the development of cut flower exports, especially tuberoses, is their short postharvest vase life caused by the disruption of the plant’s water relations due to growth and an increase in vase solution microbial load. The quality and longevity of flowers are highly dependent on their stem stability and antioxidant systems. This research investigated the effect of Nano-silver (NS) applied to the cut flowers of tuberoses cv. ‘Dezfuli’ in 24 h pulse treatments in a randomized complete design. The cut flowers were treated with NS at four rates (0 as control, 10, 20, and 30 mg/L) along with 3% sucrose. Then, the treated flowers were fully immersed in deionized water. The results showed that the application of NS treatment positively increased the activity of antioxidant enzymes and improved postharvest conditions in Polianthes tuberosa L. (cut tuberose flower). Moreover, NS reduced the accumulation of malondialdehyde (MDA) in flower stems and also had a positive effect on the rate of chlorophyll increase compared to the control. NS extended the postharvest vase life of the treated flowers versus the control and increased solution uptake and fresh weight of the cut flowers. In this experiment, the 10 mg/L rate of NS exhibited the best results.
گل مریم از با ارزش‌ترین گیاهان زینتی و جزو پنج گل برتر شاخه بریده جهان است که دارای ارزش اقتصادی بالایی می­باشد. از مهم­ترین مشکلات توسعه صادرات گل­های شاخه بریده بویژه مریم به دلیل عمر کم پس از برداشت و به دلیل به هم خوردن روابط آبی گیاه در اثر رشد و افزایش جمعیت میکروبی در محلول گلجایی می­باشد. در کشاورزی مدرن در سال­های اخیر از نانو ذرات به خاطر خواص ضد میکروبی در صنعت پس از برداشت در محصولات کشاورزی استفاده می­شود. کیفیت و ماندگاری گل­ها تا حدود زیادی به پایداری ساقه و سیستم آنتی­اکسیدانی بستگی دارد. در این پژوهش اثرات نانو نقره بر روی گل­های شاخه بریده مریم رقم ’دزفولی‘ در قالب طرح کاملاً تصادفی به‌صورت تیمار پالسی (24 ساعت) انجام شد. گل­های شاخه بریده در چهار غلظت نانو ذرات نقره (0، 10، 20 و 30 میلی­گرم در لیتر) به همراه ساکارز 3 درصد تیمار شدند و سپس گلهای تیمار شده تا انتها در آب دیونیزه شده قرارداده شدند. نتایج نشان داد بکارگیری تیمار نانو ذرات نقره باعث افزایش مثبت فعالیت خصوصیات فیزیولوژیکی و بهبود شرایط پس از برداشت در گل­های شاخه بریده مریم شد. نانو ذرات نقره همچنین باعث کاهش تجمع مالون­دی­آلدئید در ساقه­های گل گردید و موجب تاثیر مثبت بر میزان افزایش کلروفیل نسبت به شاهد شد. بکارگیری نانو نقره منجر به افزایش عمر پس از برداشت گل­های تیمار شده نسبت به شاهد گردیده و باعث افزایش جذب محلول، وزن‌تر و شکوفایی در گلهای شاخه بریده شد. نتایج این تحقیق دلالت بر آن دارد نانو نقره به­عنوان یک تنظیم کننده رشد در پس از برداشت می­باشد. در این آزمایش غلظت 10 میلی­گرم در لیتر بهترین نتیجه را به همراه داشت.
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