تأثیر تنش خشکی و سلنیوم بر برخی خصوصیات مورفوفیزیولوژی گیاه بالنگوی شهری (Lallemantia iberica L.)

نوع مقاله : پژوهشی

نویسندگان

گروه مهندسی تولید و ژنتیک گیاهی، دانشکده علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه، ایران

10.30495/iper.2022.688791

چکیده

سلنیوم یک عنصر غذایی مهم برای حیوانات و انسان است که در بسیاری از گونه‌های گیاهی نیز نقش مؤثری دارد. نقش مثبت سلنیوم در کاهش اثر تنش‌های محیطی مختلف بر گیاهان مورد تأیید قرار گرفته است. هدف از انجام پژوهش حاضر بررسی اثر سلنیوم بر برخی شاخص‌های رشدی و فیزیولوژیکی بالنگوی شهری (Lallemantia iberica L.) در شرایط تنش خشکی می‌باشد. آزمایش به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی در سه تکرار در شرایط گلخانه اجرا گردید. فاکتور اول شامل سطوح مختلف رطوبت (آبیاری کامل، 25، 50 و 75 درصد ظرفیت زراعی) و فاکتور دوم شامل غلظت‌های مختلف سلنیوم (صفر، 5 و 10 میلی‌گرم بر لیتر سلنات‌سدیم) بود. محلول‌پاشی برگی سلنات‌سدیم طی دو مرحله انجام شد. سلنیوم برخلاف تنش خشکی، وزن خشک ساقه و برگ، طول گل‌آذین و میزان نسبی آب برگ را افزایش داد. در شرایط تنش خشکی، سلنیوم موجب افزایش ارتفاع گیاه، تعداد شاخه، وزن تر ساقه، تعداد برگ و وزن تر برگ شد. سلنیوم عملکرد بیولوژیکی، وزن خشک گل‌آذین، تعداد گل، وزن بذر در هر بوته، وزن هزار دانه و عملکرد بذر را افزایش داد. سلنیوم بر هدایت روزنه‌ای، فلورسانس کلروفیل برگ و فعالیت آنزیم کاتالاز تأثیر مثبت داشت. نتایج این تحقیق نشان داد با محلول‌پاشی برگی سلنات‌سدیم می‌توان بر تنش خشکی غلبه کرده و از کاهش عملکرد بذر جلوگیری به‌عمل آورد. درنتیجه محلول‌پاشی 10 میلی‌گرم بر لیتر سلنات‌سدیم برای کاهش اثرات تنش خشکی در کشت گلخانه‌ای گیاه بالنگوی شهری قابل توصیه است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of drought stress and selenium on some morphophysiological characteristics of Dragons head (Lallemantia iberica L.)

نویسندگان [English]

  • Masoomeh Amerian
  • Alireza zebarjadi
  • javaneh alsadat mehrabi
Department of Production Engineering and Plant Genetics, Faculty of Science and Agricultural Engineering, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
چکیده [English]

In order to investigate the effect of drought stress and different levels of selenium on growth and physiological characteristics of the Dragons head (Lallemantia iberica L.), a factorial experiment was conducted in a completely randomized design with three replications at Razi University Research Greenhouse. Experimental treatments consisted of different levels of humidity levels (full irrigation, 25%, 50% and 75% field capacity) and the second factor contained different concentrations of selenium (0, 5 and 10 mg L-1 sodium selenate). Foliar application of sodium selenate was performed in two stages. According to the results, drought stress had a negative effect on stem and leaf dry weight, inflorescence fresh weight, inflorescence length and leaf relative water content. Selenium increased shoot and leaf dry weight, inflorescence length and leaf relative water content. Under drought stress, selenium increased plant height, shoot number, stem fresh weight, leaf number and leaf fresh weight. Selenium increased biological yield, inflorescence dry weight, number of flowers, seed weight per plant, 1000-seed weight and seed yield. Selenium had a positive effect on stomatal conductance and chlorophyll fluorescence of leaves. As a result, foliar application of sodium selenate can overcome drought stress and prevents reduce in seed yield. The increase in seed yield in Dragons head may be related to increase in number of flowers per inflorescence, number of seeds per plant, seed weight per plant and 1000-seed weight. Therefore, under drought stress, foliar application of sodium selenate in two stages can prevent or reduce seed yield by reducing the effects of drought stress. Therefore, foliar application of 10 mg L-1 sodium selenate is recommended to reduce the effects of drought stress on the cultivation of Dragons head.

کلیدواژه‌ها [English]

  • Yield
  • Stomatal Conductance
  • Catalase
  • Stress
  • Fluorescence
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