کاهش اثرات تنش شوری از طریق کاربرد خارجی سالیسیلیک‌اسید بر نیشکر (Saccharum officinarum L.)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه ایلام

2 موسسه تحقیقات آموزش و توسعه نیشکر وصنایع جانبی خوزستان

چکیده

در این تحقیق اثر سالیسیلیک‌اسید ( (SAبر رشد و برخی پاسخ‌های فیزیولوژیک گیاه نیشکر (Saccharum officinarum L.) تحت تنش شوری آزمایشی به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار تحت شرایط گلخآن‌های در موسسه تحقیقات و آموزش توسعه نیشکر خوزستان، ایران، طی سال. زراعی 92-1391 اجرا شد. تیمار‌های آزمایشی شامل سه سطح شوری آب آبیاری (dSm-1 1>ECW، dSm-13ECW = ، dSm-16ECW =)، و چهار غلظت SA (صفر، 5/0، یک و 5/1‌میلی‌مولار) بودند. نتایج این تحقیق نشان‌داد که تیمار محلول‌پاشی با سالیسیلیک‌اسید با غلظت یک میلی‌مولار به‌ترتیب موجب افزایش 61/10، 05/5 ،24/8 و 98/46‌ درصدی وزن خشک کل، درصد محتوای نسبی آب برگ، محتوای کلروفیل و نسبت پتاسیم به سدیم ریشه در مقایسه با عدم کاربرد سالیسیلیک‌اسید (شاهد) شد. نسبت پتاسیم به سدیم ریشه همبستگی مثبت و معنی‌داری با وزن خشک کل (**85/0r =)، محتوای نسبی آب برگ (**67/0r =)، همبستگی منفی و معنی‌داری با سدیم ریشه (**87/0-r =)، کلر ریشه(**85/0-r =)، داشت. سالیسیلیک‌اسید در غلظت 5/1‌ میلی‌مولار نسبت به تیمار 5/0 و یک ‌میلی‌مولار تأثیر مثبت کمتری در شرایط تنش شوری داشت. نتایج بیان‌گر آن است که کاربرد سالیسیلیک‌اسید با غلظت یک‌میلی‌مولار در لیتر در کاهش عوارض تنش شوری مؤثر بوده و در شرایط آب و خاک مشابه کاربرد آن در نیشکر به‌صورت محلول‌پاشی توصیه می‌گردد.

کلیدواژه‌ها


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