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بهبود جوانهزنی بذر سیاهدانه (Nigella sativa L.) با عناصر کلسیم و روی تحت تنش شوری | ||
علوم و تحقیقات بذر ایران | ||
مقاله 8، دوره 6، شماره 1، خرداد 1398، صفحه 93-105 اصل مقاله (1.39 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/jms.2019.3590 | ||
نویسندگان | ||
سعید خماری؛ مسلم مددی؛ احمد جوادی* | ||
دانشگاه محقق اردبیلی | ||
چکیده | ||
پرایمینگ بذر بهمنظور بهبود جوانهزنی و افزایش قدرت گیاهچه در محصولات زراعی، بهخصوص در شرایط وقوع تنشهای محیطی به کار گرفته میشود. پژوهش حاضر جهت ارزیابی سودمندی پرایمینگ با عناصر کلسیم و روی بر شاخصهای جوانهزنی بذر و رشد گیاهچه سیاه دانه تحت تنش شوری طراحی گردید. بدین منظور، آزمایش فاکتوریل بر پایه طرح بلوکهای کامل تصادفی با چهار تکرار اجرا شد. عوامل آزمایشی شامل پنج سطح پرایمینگ (شاهد، پرایمینگ با نانو اکسید روی، نیترات کلسیم، نیترات کلسیم+نانو اکسید روی و پرایمینگ با آب مقطر) و سه سطح شوری (صفر، 50 و 100 میلی مولار NaCl) بود. در این آزمایش شاخصهای جوانهزنی بذر، محتوای سدیم، پتاسیم و کلسیم گیاهچهها و فعالیت آنزیم پراکسیداز گیاهچهها اندازهگیری شد. نتایج نشان داد که، پرایمینگ بذر با افزایش میانگین شاخصهای جوانهزنی بذر اثرات سوء ناشی از تنش شوری را تا حدود زیادی رفع نمود. با افزایش غلظت نمک در محیط جوانهزنی بذور، مقادیر پتاسیم و کلسیم گیاهچهها کاهش و میزان سدیم و فعالیت آنزیم پراکسیداز به طور معنی داری افزایش یافت. کاربرد روشهای مختلف پرایمینگ بذر، موجب افزایش محتوای پتاسیم و کلسیم و فعالیت آنزیم پراکسیداز و نیز کاهش مقدار سدیم گیاهچه تحت تنش شوری گردید. از بین تیمارهای به کار رفته، پرایمینگ نیترات کلسیم+نانو اکسید روی بیشترین کارآیی و بهترین عملکرد را در کاهش اثرات سوء ناشی از تنش شوری بر صفات مورد اندازه گیری در گیاه دارویی سیاهدانه داشت. | ||
کلیدواژهها | ||
پرایمینگ بذر؛ تنش شوری؛ روابط یونی؛ سیستم آنتی اکسیدان؛ سیاه دانه | ||
مراجع | ||
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