The Effect of Cerium Nitrate and Salicylic Acid on Vase Life and Antioxidant System of Cut Lisianthus (Eustoma grandiflorum cv. Pink Picotte) Flowers
محورهای موضوعی : مجله گیاهان زینتی
Firoozeh Pourzarnegar
1
(Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran)
Davood Hashemabadi
2
(Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran)
کلید واژه: Senescence, Catalase, superoxide dismutase, Vase solution, Cerium nitrate,
چکیده مقاله :
To reduce the postharvest loss of cut lisianthus ‘Pink Picotte’ flowers, an experiment was conducted based on a randomized complete design with three replications. The experimental treatments were composed of salicylic acid (SA) at three rates of 50, 100 and 200 mgL-1 and cerium nitrate (Ce(NO3)3) at four rates of 20, 40, 80 and 200 μM and distilled water (control) applied at 24-h pulses with 3% sucrose. It was found that SA and Ce (NO3)3 influenced all recorded traits significantly except for dry matter. The treatments of 40 μM Ce (NO3)3 and 100 mgL-1 SA performed the best in extending vase life so that they were associated with the longest vase lives of 15.42 and 15.20 days, respectively. In addition to improving vase life, these two treatments outperformed the other treatments in inhibiting the loss of fresh weight, reducing bacterial colony in vase solution, and increasing leaf chlorophyll. The highest catalase activity (8.57 IUg-1FWmin-1) was observed in the plants treated with 40 μM Ce (NO3)3, not differing from the treatments of 50 and 100 mgL-1 SA significantly. Furthermore, these treatments were effective in increasing superoxide dismutase activity. The results revealed that the application of 200 mgL-1 SA had adverse impacts on the vase life and the related traits. Overall, it is not recommended to apply high concentrations of Ce (NO3)3 (80 and 200 μM) and SA (200 mgL-1) in the vase solution of cut lisianthus ‘Pink Picotte’ flowers.
به‌منظور کاهش ضایعات پس از برداشت گل‌های شاخه بریده لیسیانتوس رقم ’Pink Picotte‘ آزمایشی در قالب طرح کاملا تصادفی در سه تکرار اجرا شد. تیمارهای آزمایشی شامل اسید سالیسیلیک (SA) (50، 100 و 200 میلی‌گرم /لیتر) و نیترات سریم (20، 40، 80 و 200 میکرومولار) بودند که به‌صورت پالس 24 ساعته به‌همراه ساکارز 3 درصد استفاده شدند. نتایج نشان داد که اثر SA و نیترات سریم در همه صفات ارزیابی شده به‌جز ماده خشک معنی‌دار است. تیمارهای 40 میکرومولار نیترات سریم (42/15 روز) و 100 میلی‌گرم / لیتر SA (20/15 روز) موفق‌ترین تیمارها در افزایش عمر گلجایی بودند. این تیمارها علاوه بر عمر گلجایی در جلوگیری از کاهش وزن تر، کاهش جمعیت باکتریایی محلول گلجایی و افزایش کلروفیل برگ برترین تیمارها بودند. بیشترین فعالیت آنزیم کاتالاز متعلق به 40 میکرومولار نیترات سریم (8.57 IU g-1 FW min-1) بود که از نظر آماری با تیمارهای 50 و 100 میلی‌گرم در لیتر SA اختلاف معنی‌داری نداشت. همچنین این تیمارها در افزایش فعالیت آنزیم SOD موثر بودند. در این پژوهش کاربرد 200 میلی‌گرم / لیتر SA اثر منفی بر عمرگلجایی و صفات وابسته به آن داشت. در کل کاربرد غلظت‌های بالای نیترات سریم (80 و 200 میکرومولار) و اسید سالیسیلیک (200 میلی‌گرم در لیتر) در محلول گلجایی گل‌های شاخه بریده لیسیانتوس رقم ’Pink Picotte‘ توصیه نمی‌شود.
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