اثر پرایمینگ بذر با پراکسید هیدروژن بر مولفه های جوانه زنی و رشد گیاهچه گندم (Triticum aestivum L.) در شرایط تنش شوری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه زراعت، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران.

2 دانش‌آموخته کارشناسی ارشد، گروه زراعت، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران

چکیده

این تحقیق، بصورت فاکتوریل در قالب طرح کاملاً تصادفی با چهار تکرار اجرا شد. تیمارهای مورد مطالعه، شامل تنش شوری بصورت آبیاری با آب معمولی (4/0) و با شوری 4 و 8 دسی‌زیمنس بر متر نمک NaCl و پرایمینگ بذر با پراکسید هیدروژن شامل عدم پیش تیمار و پرایمینگ بذر در محلول 25 و 50 میلی‌مولار بود. در این آزمایش، صفات درصد جوانه زنی، سرعت جوانه زنی، طول ریشه چه، طول ساقه چه، ماده خشک ریشه چه، ماده خشک ساقه چه و شاخص بنیه بذر مورد بررسی قرار گرفت. در این تحقیق اثر تنش شوری و پراکسید هیدروژن برکلیه صفات مورد بررسی معنی‌دار بود. اثر متقابل تنش شوری و پراکسید هیدروژن بر صفات مورد مطالعه بجز سرعت جوانه زنی معنی‌دار شد. بیشترین درصد جوانه زنی، طول و ماده خشک ریشه چه و ساقه چه و شاخص بنیه بذر در شرایط عدم وجود تنش (آب معمولی) و کاربرد 50 میلی‌مولار پراکسید هیدروژن و کمترین آنها در شرایط شوری 8 دسی‌زیمنس بر متر و عدم کاربرد پرکسید هیدروژن حاصل گردید. بیشترین سرعت جوانه زنی در شرایط کاربرد 50 میلی مولار پراکسید هیدروژن و عدم وجود شوری حاصل شد. بطورکلی نتایج نشان داد که کاربرد پراکسید هیدروژن در شرایط وجود تنش شوری از طریق بهبود مؤلفه‌های جوانه زنی مؤثر بود و این می‌تواند به عنوان یک راهکار در جهت استقرار بهتر و مناسب گیاهچه مد نظر قرار گیرد.

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