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اثر تیمارهای اسید جیبرلیک و نیترات پتاسیم در رفع خواب بذر چهارده گونه گیاه دارویی (خانواده نعناع) | ||
| علوم و فناوری بذر ایران | ||
| مقاله 18، دوره 7، شماره 1 - شماره پیاپی 13، مرداد 1397، صفحه 233-242 اصل مقاله (646.74 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/ijsst.2018.108023.1015 | ||
| نویسندگان | ||
| پریسا محمودی* 1؛ محمد خواجه حسینی2؛ محمد حسن راشد محصل3؛ یوسف امامی پور4 | ||
| 1دانشجو | ||
| 2مدیر گروه دانشکده کشاورزی دانشگاه فردوسی مشهد | ||
| 3استاد اکولوژی گیاهان زراعی، دانشکده کشاورزی دانشگاه فردوسی | ||
| 4بخش منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان کرمان | ||
| چکیده | ||
| به منظور مطالعه اثر تیمارهای مختلف اسید جیبرلیک و نیترات پتاسیم بر روی جوانه زنی و خواب بذر 14گونه دارویی از خانواده نعناع که در بهار و تابستان سال 1392 از رویشگاههای طبیعی آنها در استان کرمان جمع‌آوری گردید، دو آزمایش جداگانه در قالب طرح کاملاً تصادفی با 4 تکرار در دمای (20-24 درجه سانتیگراد) انجام‌شد. در آزمایش اول جوانه زنی بذور در آب مقطر بررسی‌شد. نتایج نشان‌داد که بالاترین درصد جوانه‌زنی در ریحان بنفش (Ocimum basilicum) (96 درصد) و مریم گلی لوله‌ای (Salvia macrosiphon) (95 درصد) مشاهده گردید و کمترین میزان جوانه‌زنی در فراسیون (Marrubium crassidens) 5 درصد و در پونه برگه‌دار (Nepete bracteata) صفر درصد بدست آمد. در آزمایش دوم، تأثیرتیمارهای شکستن خواب نظیر، اسید جیبرلیک در سه غلظت (250، 500، 1000 پی پی ام) و نیترات پتاسیم در دو غلظت (500 و1000 پی‌پی‌ام) بر روی 10 گونه که در آب مقطر جوانه‌زنی پایینی (کمتر از 80 درصد) داشتند، بکار برده شد. تیمارهای شکستن خواب بر روی 9 گونه (نظیر فراسیون و ریحان درختی) (Marrubium crassidens and Ocimum santum) از 10 گونه مؤثر بود. در بیشتر گونه های مورد مطالعه، کاربرد تیمارهای شکستن خواب باعث افزایش درصد جوانه‌زنی و کاهش متوسط زمان جوانه‌زنی شد. بنابراین بر اساس عکس-العمل آنها به تیمارها، مشخص شد که این 9 گونه دارای خواب فیزیولوژیکی می‌باشند. | ||
| کلیدواژه‌ها | ||
| واژه های کلیدی: ˝خواب فیزیولوژیکی˝؛ ˝درصد جوانه‌زنی˝؛ ˝متوسط زمان جوانه‌زنی˝ | ||
| عنوان مقاله [English] | ||
| The effect of gibberellic acid and potassium nitrate on seed dormancy of fourteen medicinal plant species ( Lamiaceae) | ||
| نویسندگان [English] | ||
| parisa mahmoodi1؛ Mohammad Khajeh-Hosseini2؛ Mohammad Rashed-Mohassel3؛ Yousef Emamipoor4 | ||
| 1student | ||
| 2Supervisor of Faculty of Agriculture, Ferdowsi University of Mashhad. | ||
| 3Professor of Department of Crop Science, Faculty of Agriculture, Ferdowsi University of Mashhad | ||
| 4Department of Natural Resources, Kerman Agricultural and Natural Resources Research Center, AREEO, Kerman, Iran | ||
| چکیده [English] | ||
| To study the effect of gibberellic acid and potassium nitrate treatments on germination and seed dormancy of 14 medicinal plant species from the Lamiaceae, that were collected in the spring and summer of 1392 from their natural habitates in Kerman province, two separate laboratory experiments were conducted at 20-24 centigrade degree, based on completely randomized design with 4 replications of 25 seeds. In the first experiment, seed germination was considered in H2O. The results indicated that the highest germination percentages were observed in Ocimum basilicum (%96) and Salvia macrosiphon (%95) while the lowest germination were obtained in Marrubium crassidens (%5) and Nepeta bracteata (%0). In the second experiment, the effect of seed dormancy breaking treatments such as gibberellic acid (GA3) with 3 concentrations (250, 500 and 1000 ppm) and potassium nitrate with 2 concentrations (500 and 1000 ppm) were practiced on the germination of 10 plant species with low germination (below %80) in H2O. Dormancy breaking treatments were effective on 9 species (i.e. Marrubium crassidens and Ocimum santum) out of 10 species. In most studied species, dormancy breaking treatments increased germination percentage and Mean Germination Time were reduced. Therefore, based on their reactions to the treatments, it was found that these 9 species have physiological dormancy. | ||
| کلیدواژه‌ها [English] | ||
| ˝ Germination percentage˝, ˝Mean Germination Time˝, ˝ Physiological dormancy˝ | ||
| مراجع | ||
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