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تأثیر پیش تیمار بذر آویشن دنایی با عصاره گیاه نعناع فلفلی و جلبک دریایی بر جوانه زنی و رشد گیاهچه در شرایط تنش شوری | ||
| علوم و فناوری بذر ایران | ||
| مقاله 1، دوره 13، شماره 4 - شماره پیاپی 36، دی 1403، صفحه 1-15 اصل مقاله (1.18 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijsst.2023.361169.1469 | ||
| نویسندگان | ||
| احمدرضا نجفی1؛ اصغر استاجی* 2؛ مهدی قاسمی3 | ||
| 1دانشجوی کارشناسی ارشد، گروه علوم باغبانی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران. | ||
| 2دانشیار، گروه علوم باغبانی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران. | ||
| 3استادیار، گروه علوم باغبانی، دانشگاه شهرکرد، شهرکرد، ایران. | ||
| چکیده | ||
| درصد و سرعت جوانهزنی بذرها یکی از عوامل دستیابی به عملکرد بالا در کشاورزی است ولی تحت تاثیر تنشهای محیطی کاهش مییابد. پیش تیمار بذرها یکی از روشهای افزایش قدرت و سرعت جوانهزنی بذرها برای مقابله با تنش شوری است. هدف از مطالعه حاضر بررسی تأثیر پیش تیمار بذر با عصاره گیاه نعناع فلفلی (5/0، 1 و 2 درصد) و عصاره جلبک دریایی (05/0، 1 و 2 درصد) به همراه شاهد بر شاخصهای رشدی و بیوشیمیایی گیاهچه گیاه دارویی آویشن دنایی در شرایط تنش شوری (0، 50، 100، 150 میلیمولار کلرید سدیم) بود. این آزمایش گلدانی به صورت فاکتوریل در قالب طرح کاملاً تصادفی در چهار تکرار انجام گرفت. نتایج نشان داد پیشتیمار عصاره جلبک دریایی و نعناع فلفلی باعث افزایش درصد و سرعت جوانهزنی و همچنین تعداد بذر جوانه زده در شرایط عدم تنش شوری شده بود. در صفات رشدی گیاهچه هر چند در شرایط عدم تنش شوری شرایط بهتر بود ولی پیش تیمار بذرها نسبت به شرایط کنترل اثرات تنش شوری را بطور معنیداری کاهش داد. بالاترین میزان کلروفیل کل در شرایط عدم تنش شوری در بذور تیمار شده با عصاره جلبک دریایی 2 درصد بود. بیشترین فعالیت آنزیم کاتالاز و آنزیم پلی فنل اکسیداز به ترتیب در شرایط تنش شوری 100 و 150 میلی مولار و در بذور تیمار شده با عصاره جلبک دریایی 1 و 2 درصد، بود. بطور مشخص تنش شوری موجب کاهش شاخصهای رشدی شده بود ولی پیشتیمار عصاره جلبک دریایی باعث بهبود شرایط شده بود. | ||
| کلیدواژهها | ||
| ارتفاع بوته؛ آنزیمهای آنتی اکسیدان؛ پرولین؛ شاخص های بذر؛ کلروفیل کل | ||
| عنوان مقاله [English] | ||
| The effect of seed priming of Thymus daenensis by peppermint and seaweed extracts on germination and seedling growth under salinity stress conditions | ||
| نویسندگان [English] | ||
| Ahmadreza Najafi1؛ Asghar Estaji2؛ Mahdi Ghasemi3 | ||
| 1M.Sc. Student, Department of Horticultural Sciences, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran. | ||
| 2Associate Professor, Department of Horticultural Sciences, Faculty of Agriculture and Natural Resources, Mohaghegh Ardabili University, Ardabil, Iran. | ||
| 3Assistant Professor, Department of Horticultural Sciences, University of Shahrekord, Shahrekord, Iran. | ||
| چکیده [English] | ||
| The percentage and rate of seed germination are critical factors leading to high yield in agriculture, but it has a diminishing effect on environmental stress. Seed pretreatment is one of the ways to increase the strength and velocity of seed germination to deal with salt stress. The purpose of this study was to investigate the effect of seed pretreatment by peppermint (0.5, 1, and 2%) and seaweed extract (0.5, 1, and 2%) with control on the growth and biochemical traits of Thymus daenensis seedling under salinity stress (0, 50, 100, and 150 mM NaCl) conditions. This experiment was conducted as a factorial as a completely randomized design in four replications at the seedling growth stage. The results showed that seed pretreatment with peppermint and seaweed extract increased the percentage, velocity, and time of germination as well as the number of germinated seeds, in the absence of salinity stress. In seedling growth characteristics, although they were better in the absence of salinity stress, the pretreatment of the seeds significantly reduced the effects of salinity stress compared to the control conditions. The highest amount of chlorophyll in this condition was obtained in seeds treated with 2% seaweed extract. The highest activity of catalase enzyme and polyphenol oxidase enzyme was obtained in 100 and 150 mM salinity stress conditions and seeds treated with 1 and 2% seaweed extract, respectively. Salinity stress had caused a decrease in growth parameters, but seaweed extract pretreatment had improved the conditions. | ||
| کلیدواژهها [English] | ||
| Plant height, Antioxidant enzymes, Proline, Seed parameters, Total Chlorophyll | ||
| مراجع | ||
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