اثر تیمار بذور با نانوذرات تیتانیم معمولی و رنگی بر جذب عناصر و فعالیت آنزیمی

آب و خاک

مقاله 5، دوره 33، شماره 1 - شماره پیاپی 63، بهار 1398، صفحه 51-62  

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jsw.v33i1.67723

نویسندگان

حسن میر؛ احمد غلامعلی زاده ؛ نوشین میر

زابل

چکیده

گزارشات بسیاری در مورد افزایش رشد گیاهانی که در معرض نانومواد و کاربرد خارجی آنها قرار گرفته­اند وجود دارد. هدف از انجام این آزمایش بررسی احتمالی افزایش جذب نور و در نتیجه افزایش عملکرد گیاه سورگوم توسط نانوذرات تیتانیم حساس شده به رنگ می­باشد که بدین منظور جهت بررسی اثر نانوذرات دی­اکسید تیتانیم معمولی در مقایسه با نانوذرات دی­اکسید تیتانیم حساس به رنگ بر برخی خصوصیات گیاه سورگوم، آزمایشی به صورت فاکتوریل در قالب طرح کاملاً تصادفی با 12 تیمار شامل شش غلظت نانوذرات تیتانیم دی­اکسید (0، 1، 10، 50، 100 و 500 میلی­گرم بر لیتر) و شش غلظت نانوذرات تیتانیم دی­اکسید حساس شده به رنگ (0، 1، 10،  50، 100 و 500 میلی­گرم بر لیتر) در 3 تکرار اجرا شد. خصوصیات مورد نظر عبارتند از: وزن تر گیاه، وزن خشک گیاه، عناصر غذایی شامل: فسفر، پتاسیم، منگنز و روی، فعالیت آنزیم­های آسکوربات پراکسیداز و گایاکول پراکسیداز و مقدار کلروفیل a مورد ارزیابی قرار گرفتند. طبق نتایج بدست آمده وزن خشک، فعالیت آنزیمی گایاکول پراکسیداز و آسکوربات پراکسیداز به­ترتیب در غلظت­های 10، 100 و 500 میلی­گرم بر لیتر نانوذرات حساس شده به رنگ 25/1، 7/2 و 28/3 برابر و میزان عناصر فسفر، پتاسیم، منگنز و روی، به‌ترتیب در غلظت­های 10، 100، 500 و 50 میلی­گرم بر لیتر نانوذرات حساس شده به رنگ 34/72، 85/42، 95/73 و 17/28 درصد افزایش معنی­دار نسبت به شاهد نشان دادند و دارای بالاترین عملکرد بودند، به استثنای دو خصوصیت وزن تر و کلروفیل a که کلروفیل a در غلظت 500 میلی­گرم بر لیتر هر دو نانوذره از نظر آماری بالاترین مقدار را نشان داد، اما وزن تر برخلاف دیگر خصوصیت­ها با اعمال نانوذرات معمولی بهترین عملکرد را نشان داد. به نظر می­رسد که این نانوذرات بر اثر رنگ­دار شدن، واکنش­های مرتبط با نور و جذب عناصر را نسبت به نانوذرات معمولی شدت می­دهند و در نتیجه عملکرد بهتری حاصل می‌گردد.

کلیدواژه‌ها

آنزیم؛ حساس به رنگ؛ سورگوم؛ عناصر غذایی؛ کلروفیل

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