بررسی تأثیر محیط کشت‌ها و تنظیم کننده‌های رشد گیاهی بر کشت تک گره گیاه پپینو (Solanum muricatum Aiton) در شرایط کشت بافت

نوع مقاله : مقالات پژوهشی

نویسندگان

• مائده عقدائی ¹
• سید حسین نعمتی ¹
• لیلا سمیعی ¹
• احمد شریفی شریف آباد ²

¹ دانشگاه فردوسی مشهد

² جهاد دانشگاهی خراسان رضوی

https://doi.org/10.22067/jhorts4.v33i3.76833

چکیده

پپینو یک سبزی‌ میوه‌ای متعلق به خانواده سولاناسه بوده که مشکل اساسی در توسعه‌ی کشت این گیاه تکثیر آن می‌باشد که از طریق بذر موفقیت اندکی دارد. از این‌رو این پژوهش با هدف تکثیر انبوه از طریق کشت بافت انجام گردید. به‌منظور دستیابی به بهترین نوع محیط کشت و ترکیب تنظیم کننده‌های رشد گیاهی از ریزنمونه تک گره پپینو استفاده گردید. این تحقیق در قالب سه آزمایش جداگانه با استفاده از چهار نوع محیط کشت (MS، ½ MS، SH و B5)، دو نوع سیتوکنین (بنزیل آدنین (BA) و کینتین (Kin)) و دو نوع اکسین (ایندول بوتریک اسید (IBA) و نفتالین استیک اسید (NAA)) برای تعیین بهترین محیط کشت و دستیابی به ترکیب مناسبی از تنظیم کننده‌های رشد گیاهی برای پرآوری شاخساره و ریشه‌زایی انجام شد. نتایج نشان داد که بهترین محیط کشت برای ریزازدیادی ریزنمونه تک گره پپینو با توجه به تعداد شاخساره، طول شاخساره، تعداد ریشه، طول ریشه، تعداد برگ و طول برگ محیط کشت پایه MS بود. در آزمایش پرآوری شاخه، بیش‌ترین تعداد شاخساره، تعداد برگ، رنگ شاخساره و کیفیت شاخساره القا شده در اثر کاربرد محیط کشت MS غنی شده با دو میلی‌گرم در لیتر BA به‌همراه یک میلی‌گرم در لیتر Kin به‌دست آمد. همچنین بیش‌ترین میزان طول شاخساره و طول برگ به‌ترتیب با کاربرد محیط کشت MS غنی شده با یک میلی‌گرم در لیتر BA همراه با دو میلی‌گرم در لیتر Kin و تیمار یک میلی‌گرم در لیتر BA همراه با یک میلی‌گرم در لیتر Kin حاصل شد. در آزمایش ریشه‌زایی، بیش‌ترین میانگین تعداد ریشه و کیفیت ریشه با استفاده از IBA با غلظت 6/0 میلی‌گرم در لیتر به‌دست آمد، در حالی که بیش‌ترین میانگین طول ریشه با کاربرد IBA با غلظت 3/0 میلی‌گرم در لیتر مشاهده شد. در مجموع بهترین نتایج با محیط کشت MS، غلظت دو میلی‌گرم در لیتر BA همراه با یک میلی‌گرم در لیتر Kin جهت پرآوری و همچنین غلظت 6/0 میلی‌گرم در لیتر IBA جهت ریشه‌زایی ریزنمونه پپینو به‌دست آمد.

کلیدواژه‌ها

• ایندول بوتیریک اسید
• بنزیل آدنین
• پرآوری
• ریشه‌زایی
• کشت بافت

20.1001.1.20084730.1398.33.3.9.9

عنوان مقاله [English]

Effect of Medium and Plant Growth Regulators on Micropropagation of Pepino (Solanum muricatum Aiton) in vitro Condition

نویسندگان [English]

• Maedeh Aghdaei ¹
• Seyyed Hossein Nemati ¹
• Leila Samiei ¹
• Ahmad Sharifi ²

¹ Ferdowsi university of Mashhad

² Iranian Academic Center for Education, Culture and Research, Branch of Mashhad, Iran

چکیده [English]

Introduction: Pepino (Solanum muricatum Aiton) is a diploid herbaceous plant belongs to the Solanaceae family, which is growing in subtropical zone, originates from Andes in South America. It is commercially grown for its fruit, which is appreciated not only for food but also for its appearance, in South American countries, including Bolivia, Colombia, Ecuador and Peru, as well as in countries such as New Zealand and Australia. Pepino is propagated by seed, cutting, and tissue culture methods. Most pepino cultivars are sexually fertile and produce viable seeds, but their seeds have poor germination and high level of heterozygosis causing to highly variable plants. Both mentioned negative aspects have limited the mass production of this plant through seed. In this case, stem cutting is used as the most common way of propagating pepino led to transmission of viral diseases and increasing propagation costs as two main limiting factors of pepino propagation. So, micropropagation systems are a promising tool to produce disease-free clonal plant material with low costs. Therefore, the present study was aimed to assess the effect of different media and plant growth regulators on micropropagation traits of pepino.
Materials and Methods: Three separate experiments were carried out in institute of plant sciences of Ferdowsi University of Mashhad in 2016. Pepino seeds were bought from company of Plant World Seed, UK, were cultivated on MS medium. Grown plants were used as source of providing explants. Four mediums, including MS, ½ MS, SH and B5 were used to determine the best culture medium for shoot regeneration of pepino using single node explant. A factorial experiment was conducted based on a completely randomized design. Some growth properties such as number of shoots, shoot length, number of roots, root length, leaf number and leaf length were evaluated after two and four weeks. In proliferation experiment, MS medium was compared with MS supplemented with different concentrations of BA (0.5, 1 and 2 mg L-1) and Kin (0.5, 1 and 2 mg L-1) applied as combined treatments, and also BA used alone at concentrations of 2, 4 and 6 mg L-1 that was conducted based on a completely randomized design. For rooting of explants, an experiment was conducted based on a completely randomized design containing of two concentrations of IBA (at 0.3 and 0.6 mg L-1) and three concentrations of NAA (at 0.3, 0.6 and 0.9 mg L-1) in MS medium. Some growth properties including root number and length, root density and root quality were evaluated after four weeks
Results and Discussion: Results indicated that micropropagation rate of pepino was affected by culture medium type. The highest shoot length, number of root, root length and leaf number were obtained in MS medium, although statistically there was no significant difference between MS and ½ MS media. The highest number of shoots and leaf length were observed in MS medium, which led to a significant difference with other media (½ MS, SH and B5). Overall, Based on obtained results MS medium was the best culture medium for micropropagation of pepino using single node. In the proliferation experiment, the highest shoot and leaf number and plant color were obtained with using 2 mg L-1 BA + 1 mg L-1 Kin, whereas the highest shoot length and leaf length were observed in the 1 mg L-1 BA + 2 mg L-1 Kin and 1 mg L-1 BA+1 mg L-1 Kin treatments, respectively. Increasing in concentration of BA up to 2 mg L-1 in combination with Kin had a positive effect on shoot proliferation, while applying BA at concentration 2, 4 and 6 mg L-1 alone led to decrease in proliferation. Results obtained from rooting experiment showed that the highest root number, root density and root quality were obtained using IBA at the concentration of 0.6 mg L-1, whereas the highest root length was observed by applying IBA at concentration of 0.3 mg L-1, which led to a significant difference with other treatments. Furthermore, results indicated that the effect of IBA on rooting of pepino microshoots was more than NAA.
Conclusion: Generally, the best results were obtained by MS medium, 2 mg L-1 BA with 1 mg L-1 Kin for shoot proliferation, and IBA at concentration of 0.6 mg L-1 for the rooting of pepino nodal segments.

کلیدواژه‌ها [English]

• BA
• IBA
• Proliferation
• Rooting
• Tissue culture

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