بهینه‌سازی نوع ترکیب تنظیم کننده رشد گیاهی و نمک‌های محیط کشت در ریزازدیادی گیاه سینگونیوم (Syngonium podophyllum L.)

نوع مقاله : مقالات پژوهشی

نویسندگان

• احمد شریفی ¹
• مریم مرادیان ²
• نسیم صفری ³
• آزاده خادم ⁴
• سیده مهدیه خرازی ¹

¹ استادیار گروه بیوتکنولوژی گیاهان زینتی جهاد دانشگاهی خراسان رضوی

² جهاد دانشگاهی خراسان رضوی

³ دانشجوی دکتری تخصصی، گروه علوم باغبانی و فضای سبز، دانشکده کشاورزی، دانشگاه فردوسی مشهد

⁴ مربی گروه بیوتکنولوژی گیاهان زینتی جهاد دانشگاهی خراسان رضوی

10.22067/jhs.2021.68818.1021

چکیده

امروزه استفاده از گیاهان برگ­زینتی در فضای آپارتمان برای زیباسازی فضا و طراحی فضای داخلی امری رایج است. بنابراین، تعیین بهترین روش تکثیر با هدف تولید تعداد زیاد گیاه در مدت زمان کوتاه، در این گیاهان امری ضروری است. بدین منظور آزمایشی برای ریزافزایی گیاه برگ­زینتی سینگونیوم طراحی و اجرا گردید. در راستای درصد باززایی ریزنمونه‌های گره با طول یک سانتی‌متر در محیط‌کشت‌ نیمه­جامد MS حاوی غلظت­های مختلف تنظیم کننده رشد گیاهی BA و Kin قرار داده شدند. به منظور بررسی درصد پرآوری ریزنمونه­ها آزمایشی در قالب طرح فاکتوریل بر پایه طرح کاملاً تصادفی با پنج تکرار انجام شد. عامل اول شامل نوع محیط کشت (MS و B₅) و عامل دوم غلظت­های مختلف آن (0/5 و 1) بود. در آزمایش سوم، به بررسی سازگاری گیاهچه­ها با استفاده از بسترهای کشت مختلف پرداخته شد. این آزمایش به صورت طرح کاملاً تصادفی انجام شد. با توجه به نتایج آزمایش، مشخص گردید که استفاده از سیتوکینین در محیط کشت پایه MS بر باززایی گیاه موثر است. بیشترین تعداد گیاهچه باززاشده در محیط کشت حاوی 4 میلی­گرم  بر لیتر BA به همراه 0/2 میلی­گرم بر لیتر IAA مشاهده شد. همچنین، با افزایش غلظت BA در محیط کشت، از ارتفاع گیاه کاسته شد اما تعداد گیاهچه تولیدی در آن افزایش یافت. در مقایسه دو محیط کشت MS و B₅، مشخص گردید که استفاده از محیط کشت نصف غلظت MS در مرحله پرآوری در این گیاه به دلیل بهبود صفات رشدی مانند ارتفاع گیاهچه و طول ریشه مناسب است. در مرحله سازگاری استفاده از بستر کشت ورمی کولایت + پیت ماس منجر به سازگاری صد درصدی گیاهان و بهبود صفات رشدی در گیاه گردید.

کلیدواژه‌ها

• باززایی
• بستر کشت
• پرآوری
• سازگاری
• سینگونیوم

20.1001.1.20084730.1400.35.4.15.1

موضوعات

• بیوتکنولوژی و اصلاح درختان و گل های زینتی

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عنوان مقاله [English]

Optimization Plant Growth Regulation Type and Culture Medium Salts in the Micropropagation of Syngonium (Syngonium podophyllum L.)

نویسندگان [English]

• A. Sharifi ¹
• M. Moradiyan ²
• nasim safari ³
• A. Khadem ⁴
• M. Kharrazi ¹

¹ Assistant Professor, Department of Ornamental Plant Biotechnology, Iranian Academic Center for Education, Culture and Research, Khorasan Razavi, Iran

² Academic Center for Education, Culture and Research: ACECR, Razavi Khorasan Province

³ Ph.D. Student, Department of Horticultural science and landscape, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran

⁴ Instructor, Department of Ornamental Plant Biotechnology, Iranian Academic Center for Education, Culture and Research, Khorasan Razavi, Iran

چکیده [English]

Introduction: Ornamental foliage plants are commonly used for beautifying indoor spaces. Consequently, determining the best method of mass propagation in a short time, is necessary for these plants. For this purpose, an experiment was designed and performed to micropropagate the Singonium ornamental plant.
Materials and Methods: For the first stage, the effect of different plant growth plant growth regulators on the regeneration of nodule explants was evaluated. In this experiment, 1 cm nodal explants were placed in semi-solid MS culture medium containing different concentrations of BA and Kin (0, 1, 2, 3 and 4 mg/l) in combination with 0.2 mg/l IAA. This experiment was performed as a factorial based on a completely randomized design with four replications. The first factor included different types of cytokinin (BA and Kin) and the second factor included different concentrations (0, 1, 2, 3 and 4 mg/l). In the second stage, the effect of different types of culture medium and its different concentrations on plantlet proliferation was investigated. This study was performed as a factorial experiment based on a completely randomized design with five replications. The first factor included the type of culture medium (MS and B₅) and the second factor was the different concentrations of culture medium (0.5 and 1). In the third stage of the experiment, the acclimation of in vitro plantlet was investigated. This experiment was performed as a completely randomized design with three replications. The experimental treatments included different culture media: vermiculite, peat moss, vermiculite + peat moss, perlite + peat moss, perlite, coco peat + vermiculite, coco peat + perlite, coco peat and rock wool.
Results and Discussion: According to the results of the first experiment, it was found that the use of cytokinin in MS culture medium is effective on plant regeneration. The highest number of regenerated plantlet was observed in culture medium containing 4 mg/l BA with 0.2 mg/l IAA. It is noteworthy that with increasing BA concentration in the culture medium, the plant height decreased, but in contrast, the number of produced plantlets increased. Benzyl aminopurine (BAP) has been introduced as the most important and effective cytokinin in inducing and increasing branching in plants. Research has shown that the use of external benzyl adenine affects plant growth by affecting plant cells or by controlling the accumulation of a number of cytokinin compounds. As a result, the use of cytokinins in culture medium under in vitro culture conditions is necessary to induce and increase cell division. According to the second experimental results, produced plantlets in MS culture medium had higher height, number of roots and root length compared to B5 culture medium. Results also demonstrated that the use of ½ MS in the propagation stage of this plant is appropriate due to the improvement of growth traits such as plantlet height and root length. The use of optimal and suitable culture medium is very effective in the success of plant micropropagation. In the present study, the use of MS culture medium showed better performance compared to B5 culture medium. The appropriate amount of components, better ion strength and more minerals in this culture medium compared to B5 culture medium are probably the factors influencing its superiority in in vitro culture. In the acclimation stage, the use of vermiculite + peat moss culture medium led to 100% adaptation of plants and improvement of growth traits in the plant.
Conclusion: The results showed that the type and concentration of cytokinin had a significant effect on the most of the evaluated parameters. With increasing the concentration of cytokinin in the culture medium, the number of regenerated plantlet was increased, but on the other hand, the height of regenerated plantlet also decreased. The use of culture medium containing BA compared to KIN had a more pronounced effect on increasing the number of regenerated plantlets. Application of MS medium compared to B₅ medium was more effective in increasing plantlet height, root length, number of roots and number of produced plantlets. Also, half-strength MS medium, increased plantlet height and root length. Therefore, at this stage of propagation, the application of ½ MS culture medium is recommended. In the acclimation stage, it can be stated that the use of vermiculite substrate in combination with peat moss is a suitable option considering 100% compatibility of syngonium plantlets and improvement of growth traits in comparison with other substrates.

کلیدواژه‌ها [English]

• Adaptation
• Culture medium
• Regeneration
• Reproduction
• Syngonium

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