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اثر برهمکنش روشهای خراشدهی سنتی و امواج فراصوت در ترکیب با جیبرلین بر شکست خواب بذر و رشد دانهرست گون گزی (Astragalus adscendens Boiss. & Hausskn) | ||
| علوم و تحقیقات بذر ایران | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 31 خرداد 1405 | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22124/jms.2026.9717 | ||
| نویسندگان | ||
| ریحانه عموآقایی* 1؛ نگین معین2 | ||
| 1گروه علوم گیاهی، دانشکده علوم دانشگاه شهرکرد | ||
| 2گروه علوم گیاهی، دانشکده علوم، دانشگاه شهرکرد | ||
| چکیده | ||
| تکثیر گیاه گون گزی بدلیل پوسته سخت بذرهای آن مشکل است. بنابراین در مطالعه حاضر، در آزمایش اول اثر خراشدهی فیزیکی و شیمیایی (شاهد، 2 و 5 دقیقه سنبادهزنی بذر و غوطهوری در اسید کلریدریک با غلظت 50 درصد به مدت 2، 5 و10 دقیقه) بر جوانهزنی بذر بررسی شد. بهترین نتایج با 2 دقیقه سنباده و 5 دقیقه غوطهوری در اسید بدست آمد که منجر به حدود 70 درصد جوانهزنی و بیشترین مقادیر طول دانهرست و بنیه بذر شد. در آزمایش دوم اثر امواج فراصوت با سطوح مختلف قدرت (0، 25، 50 و 100 وات) و مدت زمان (5، 10 و 15 دقیقه) روی شکست خواب بذر ارزیابی شد. نتایج نشان داد بیشترین درصد جوانهزنی (%75)، کمترین میانگین زمان جوانهزنی (5 روز) و بالاترین طول دانهرست (46 میلیمتر) و بنیه (33 میلیمتر) با استفاده از توان فراصوت 50 وات به مدت 15 دقیقه بهدست آمد. در حالیکه با افزایش توان به 100 وات در مدت زمان 15 دقیقه، این پارامترها به شدت کاهش یافتند. در آزمایش سوم، اثر متقابل بهترین سطوح خراشدهی هر دو آزمایش فوق با سطوح مختلف جیبرلین بر شکست خواب بذر و رشد دانهرست گون گزی بررسی شد. بهترین نتایج با تیمار ترکیبی فراصوت و 1000 میلیگرم در لیتر جیبرلین بدست آمد که منجر به 95 درصد جوانهزنی و بیشترین طول ریشه (27 میلیمتر) و ساقهچه (23 میلیمتر) دانه رست شد. این یافتهها، پیشنهاد میکند 70 درصد خواب بذر گون گزی از نوع فیزیکی بوده و تنها حدود 25 درصد از خواب بذر از نوع فیزیولوژیکی است. | ||
| کلیدواژهها | ||
| بنیه دانه رست؛ خراش مکانیکی و شیمیایی؛ خواب فیزیولوژیکی؛ سرعت جوانه زنی بذر | ||
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آمار تعداد مشاهده مقاله: 4 |
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