نوع مقاله : مقالات پژوهشی
نویسندگان
1 گروه علوم و مهندسی باغبانی، دانشکده علوم زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
2 گیاهان دارویی، مؤسسه آموزش عالی سنا، ساری، ایران
3 گروه مهندسی علوم خاک، دانشکده علوم زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
چکیده
تغذیه گیاهان با الکلهایی نظیر اتانول و متانول به عنوان منابع کربنی یکی از روشهای مناسب جهت افزایش خصوصیات کمّی و کیفی آنها میباشد. با توجه به اهمیت گیاه دارویی نعناع فلفلی (Mentha piperita L.) در تولید متابولیتهای ثانویه باارزش و همچنین تأثیر اتانول و متانول بر برخی خصوصیات مورفولوژیکی و فیزیولوژیکی این گیاه، آزمایشی گلدانی در قالب فاکتوریل بر پایه طرح کاملاً تصادفی با سه تکرار در گلخانه تحقیقاتی دانشگاه شاهد در سال 1397 انجام شد. تیمارهای محلولپاشی شامل غلظتهای مختلف صفر، 15، 30 و 45 درصد از اتانول و متانول بود. نتایج نشان داد که اتانول 45 درصد بیشترین تأثیر را بر درصد اسانس، عملکرد اسانس و درصد پروتئین داشت. ولی استفاده از تیمار 15 درصد اتانول بالاترین مقدار را در سایر صفات (ارتفاع بوته، فنل و فلاونوئید کل) به خود اختصاص داد که با تیمار 45 درصد متانول در یک سطح آماری قرار داشت. همچنین بیشترین تعداد برگ و کلروفیل a در تیمار تلفیقی 15 درصد اتانول و 15 درصد متانول مشاهده شد، در صورتیکه بالاترین میزان کلروفیل b و کلروفیل کل مربوط به کاربرد تلفیقی 15 درصد اتانول و 45 درصد متانول بود. بنابراین، با توجه به اثر مثبت محلولپاشی اتانول و متانول در خصوصیات رشدی گیاه نعناع فلفلی، استفاده از این ترکیبات الکلی توصیه میگردد.
کلیدواژهها
موضوعات
عنوان مقاله [English]
Investigation of Morpho-Physiological Properties of Peppermint (Mentha piperita L.) Affected by Carbon Sources of Ethanol and Methanol
نویسندگان [English]
- Vahid Akbarpour 1
- Mostafa Motaharinezhad 2
- Mohammad Ali Bahmanyar 3
1 Horticultural Sciences and Engineering Department, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2 Medicinal Plants, Sana Institute of Higher Education, Sari. Iran
3 Department of Soil Sciences, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
چکیده [English]
Introduction
Nowadays, spraying method is used in plant nutrition to optimize the use of chemical fertilizers and reduce environmental hazards. With the foliar solution, the elements are quickly transferred to the plant and delivered to the branch, leaf, or fruit. Surveys show that increase performance per unit area is one of the most important things that has attracted the attention of many researchers. The first requirement for high performance is high dry matter production per unit area. Some experiments have shown that increasing the amount of carbon dioxide in the air can increase yield, accelerate flowering and accumulate carbohydrates in plants. One of the solutions to increase carbon dioxide concentrations in plants is to use compounds such as ethanol and methanol. Therefore feeding plants with alcohols such as ethanol and methanol as carbon sources is one of the appropriate methods to increase their quantitative and qualitative properties.
Materials and Methods
Due to the importance of peppermint (Mentha piperita L.) in the production of valuable secondary metabolites, and also the effect of ethanol and methanol on some morphological and physiological parameters of this plant, a pot experiment was conducted in factorial based on completely randomized design with three replications in the research greenhouse of Shahed University in 2018. Foliar treatments included different concentrations of 0, 15, 30 and 45% ethanol, methanol and combine them that was done in three stages. The studied traits were plant height, number of leaves per plant, biological yield, chlorophyll a, chlorophyll b, total chlorophyll, carotenoid, flavonoid, essential oil percentage, essential oil yield and protein percentage. Data analysis was performed using SAS statistical software (version 9.2) and mean treatments were compared by LSD test. Also charts were drawn by excel software.
Results and Discussion
The results showed that the simple effects of ethanol and methanol on plant height, biological yield, flavonoid content, essential oil percentage, essential oil yield and protein percentage were significant but their interactions were not significant. Ethanol 45% had the most effect on percentage and yield of essential oil and protein percentage. But the use of 15% ethanol treatment had the highest value in other traits (plant height, total phenol and flavonoids), which was at a statistical level with 45% methanol treatment. Also interaction between ethanol and methanol on leaf number per plant, chlorophyll a, chlorophyll b, total chlorophyll and carotenoid was significant at 1% probability level. The highest number of leaves per plant and chlorophyll a (29.55 µg/g fresh leaf weight) was observed in the combination of 15% ethanol and 15% methanol, while the highest amount of chlorophyll b (20.86 µg/g fresh leaf weight) and total chlorophyll (49.85 µg/g fresh leaf weight) was related to the combined application of 15% ethanol and 45% methanol.
Conclusion
Foliar spraying is one of the methods of fertilization and supply of nutrients to plants that due to high absorption rate nutrients can be made available to plants in the shortest time. The results of this study showed that all the studied traits were significantly affected by one or more of the ethanol and methanol treatments. Therefore, the foliar application of ethanol and methanol as carbon sources has an important role in improving the qualitative and quantitative parameters of peppermint.
کلیدواژهها [English]
- Ethanol
- Methanol
- Peppermint
- Secondary metabolite
- Spray
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