Alleviation of salt stress damages by chalcone-based nanocomposite in lettuce plants

Document Type : Research Paper


Department of Biology, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran


This study aimed to investigate the effect of chalcone-based nanocomposite in various concentrations on lettuce plants under salinity treatment. The composite was synthesized by chemical methods with a mean particle size of 89.4 ± 4.2 nm. The factors consisted of salinity concentrations of 100, 125, and 150 mmol/l and nanocomposite concentrations of 0.1 and 0.01 ppm. After harvest, different physiological and biochemical characteristics were measured. The results indicated that the nanocomposite significantly increased the fresh and dry weight of roots and glycine betaine in the lettuce plants at higher salinity stress conditions (150 mmol/l). Contrarily, the nanocomposite significantly reduced malondialdehyde at the salinity stress conditions. Also, the nanocomposite caused a significant increase in total flavonoid content under the salinity stress conditions of 150 mmol/l and activity of ascorbate peroxidase, an antioxidant enzyme, at the salt concentration of 150 mmol/l. It can be concluded that chalcone-based nanocomposite may ameliorate the negative effects of the salinity stress on plants.


Article Title [Persian]

کاهش آسیب های ناشی تنش از تنش شوری با استفاده از نانوکامپوزیت حاوی شالکون در گیاه کاهو

Authors [Persian]

  • سید مهدی رضوی
  • سید عباس عسگری
  • پریسا نصرالهی
گروه زیست شناسی، دانشکده علوم، دانشگاه محقق اردبیلی، اردبیل
Abstract [Persian]

هدف این تحقیق، بررسی اثرات نانوساختار شالکون در غلظت­ های مختلف بر گیاه کاهو در شرایط تنش شوری بود. تیمار شوری شامل غلظت ­های 100، 120 و 150 میلی مول بر لیتر نمک و غلطت­ های 0.1 و 0.01 از نانوکامپوزیت بود. نانوکمپوزیت با روش­ های شیمیایی و به اندازه 89.4 نانومتر ساخته شد.  بعد از برداشت گیاهان، صفات مختلف فیزیولوژیکی و بیوشیمیایی مورد سنجش قرار گرفتند. نتایج نشان داد که نانوکامپوزیت حاوی شالکون به طور معنی­ داری موجب افزایش برخی صفات مانند وزن تر و وزن خشک ریشه و میزان گلیسین بتا بتائین را در گیاه کاهو در شرایط تنش شوری بالاتر (150 میلی مول در لیتر) افزایش داد.  برعکس، نانوکمپوزیت شالکون به طور معنی داری نشانگر تنش، یعنی مالون دی آلدئید، را در شرایط شوری کاهش داد. از طرف دیگر، نانوکمپوزیت منجر به افزایش معنی ­دار فلاونوئید کل در شرایط تنش شوری 150 میلی مول در لیتر و فعالیت آنزیم آنتی اکسیدان آسکوربات پراکسیداز در شوری 150 میلی مول در لیتر شد. می­ توان نتیجه گرفت که نانوکمپوزیت بر پایه شالکون قادر است اثرات منفی تنش شوری در گیاهان را تعدیل نماید.

Keywords [Persian]

  • شالکون
  • شوری
  • کاهو
  • نانوکمپوزیت
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