نوع مقاله : مقاله پژوهشی

نویسندگان

1 پژوهشکده کشاورزی هسته ای- پژوهشگاه علوم و فنون هسته ای- ایران

2 مدیر گروه گیاهپزشکی و نگهداری مواد غذایی- پژوهشکده کشاورزی هسته ای- پژوهشگاه علوم و فنون هسته ای- ایران

3 پژوهشکده کشاورزی هسته ای، پژوهشگاه علوم و فنون هسته ای، سازمان انرژی اتمی ایران، کرج

چکیده

یکی از روش‌های پیش‌جوانه‌زنی (پرایمینگ)، بیوپرایمینگ با باکتری‌های محرک رشد به‌منظور افزایش جوانه‌زنی بذر و تحریک رشد گیاهچه است. در این پژوهش، اثرات مختلف پرتو گاما بر باکتری‌ها به عنوان موتانت، باکتری‌های پرتوندیده (وحشی) و شاهد و سپس تاثیر آن‌ها بر جوانه‌زنی و صفات رویشی بذور بررسی گردید. بذور منتخب شامل حبوبات، غلات و گیاهان باغی بودند. آزمایش در قالب طرح کاملا تصادفی با ۳ تکرار انجام شدند. نتایج نشان داد که جوانه‌زنی در بذور، واکنش مثبت به باکتری‌ها داشتند؛ اما بذر لوبیا، واکنش‌های متفاوتی نسبت به تیمارها داشت. واکنش بذور مختلف به باکتری‌های موتانت و وحشی متفاوت بود. نخود جوانه‌زنی صد درصدی با باکتری‌های محرک رشد به دست آورد. سویاُ، کتان، ماش، گندم و کاهو افزایش جوانه زنی بالاتری نسبت به شاهد داشتند. در دیگر صفات رویشی اندازه‌گیری‌شده نسبت به شاهد، در اثر باکتری‌ها، به‌ویژه باکتری-های موتانت مشاهده شد. اما به‌طور کلی می‌توان بیان کرد که تمام بذور در بیشتر صفات نسبت به شاهد افزایش داشته و واکنش مثبت نشان دادند.

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