A Simple and Rapid Method for Micropropagation of Petunia × hybrida F1 'Opera Supreme Pink Morn'
محورهای موضوعی : مجله گیاهان زینتیShahram Mehri 1 , Mohammad Nabi Ilkaee 2 , Farzin Saeedzadeh 3
1 - Department of Agronomy, Pars Abad Moghan Branch, Islamic Azad University, Pars Abad Moghan, Iran
2 - Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran
3 - Department of Agronomy and Plant Breeding, Astara Branch, Islamic Azad University, Astara, Iran.
کلید واژه: tissue culture, plant growth regulators, Auxins, Cytokinins, ornamental plants, <, i>, In vitro<, /i>, culture,
چکیده مقاله :
For efficient regeneration of Petunia × hybrida F1 'Opera Supreme Pink Morn', a simple in vitro micropropagation protocol was developed. Axillary bud explants dissected from 30-day-old in vitro-grown seedlings sprouted from hybrid seeds were cultured on Murashige and Skoog (MS) medium supplemented with 36 combinations of 6-benzylaminopurine (BA; 0.00, 0.50, 1.00, 2.00, 3.00 and 5.00 mg l-1) and α-naphthaleneacetic acid (NAA; 0.00, 0.10, 0.50, 1.00, 1.50 and 3.00 mg l-1). The BA alone at 0.50 or 2.00 mg l-1 was found to be best for shoot length, shoot number, node number, and leaf number than other concentrations of BA and BA in combination with NAA. The highest number of shoots (8.44) and the maximum average shoot length (13.16 cm) were recorded on MS medium supplemented with 0.50 mg l-1 BA without NAA. Root length (5.20 cm) and root number (8.77) were the maximum in the medium containing 0.10 mg l-1 NAA. The plantlets regenerated in vitro with well-developed shoots and roots were successfully established in pots containing peat and perlite and grown in a greenhouse within 4 weeks with a 100% survival rate. The regenerated plants were morphologically identical with donor plants and did not show any detectable phenotypic variation. Overall, BA at 0.50 or 2.00 mg l-1 had a better effect on shoot system than other concentrations of BA and BA in combination with NAA. NAA induced more root formation and root growth than BA.
برای تکثیر مطلوب گل اطلسی رقم ’مرلین مورن صورتی‘، ما یک روش ساده ریزازدیادی آزمایشگاهی ابداع کردیم. برای این منظور جوانه‌های انتهایی 30 روزه حاصل از گیاهان رشد یافته در محیط آزمایشگاهی از بذرهای هیبرید، در محیط موراشیگ و اسکوگ (MS) تیمار شده با 36 ترکیب تیماری حاصل از سطوح 6- بنزیل‌آمینوپورین (0، 5/0، 1، 2، 3 و 5 میلی گرم BA در لیتر) در سطوح آلفا نفتالین استیک اسید (0، 1/0، 5/0، 1، 5/1 و 3 میلی گرم NAA در لیتر) کشت داده شدند. نتایج نشان داد که فقط BA در مقدار 5/0 یا 2 میلی‌گرم در لیتر برای طول ساقه، تعداد ساقه، تعداد گره و تعداد برگ در مقایسه با سایر غلظت‌های BA و BA در ترکیب با NAA، بهتر بود. بیشترین تعداد شاخه فرعی (44/8) و حداکثر طول ساقه (16/13سانتیمتر) در محیط MS حاوی 50/0 میلی‌گرم در لیتر BA بدون NAA ثبت شد. حداکثر طول ریشه (2/5 سانتی متر) و تعداد ریشه (77/8) در محیط حاوی 10/0 میلی‌گرم NAA لیتر مشاهده شد. گیاهان پرورش یافته در محیط آزمایشگاهی در داخل گلدان‌های حاوی پرلیت و کوکوپیت کاشته شدند و در طی 4 هفته با بقای 100٪ رشد کردند. گیاهان تکثیر شده از لحاظ مورفولوژیکی با گیاهان مادری مشابه بودند و هیچ گونه تنوع فنوتیپی قابل تشخیص مشاهده نشد.
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