پیش تیمار پراکسید هیدروژن بر برخی خصوصیات مورفو- فیزیولوژیکی و بیوشیمیایی گندم تحت تنش شوری

نوع مقاله: علمی پژوهشی

نویسندگان

1 دانشجوی دکتری فیزیولوژی گیاهان زراعی،دانشکده کشاورزی دانشگاه ایلام ، ایران

2 دانشیار گروه زراعت دانشکده کشاورزی دانشگاه ایلام، ایران

چکیده

شوری از جمله عوامل اصلی کاهش تولیدات زراعی در مناطق خشک جهان محسوب می­ گردد. در این آزمایش اثرات شوری بر خصوصیات فیزیولوژیک، مورفولوژیک و اجزای عملکرد گندم (رقم سرداری) تحت پیش تیمار بذر با پراکسید هیدروژن بررسی شد. آزمایش به صورت فاکتوریل و در قالب طرح بلوک­ های کامل تصادفی با سه تکرار در گلخانه انجام گرفت. تیمارهای آزمایش شامل سه سطح شوری (صفر، 80، 120 میلی­ مولار) و پراکسید هیدروژن در چهار سطح شامل غلظت­ های 0، 25، 50 و 80 میلی­ مولار بودند. در این مطالعه، تنش شوری تمامی اجزای عملکرد و نیز سطوح آنتی­ اکسیدان­ها، رنگیزه­ ها و تعداد و طول روزنه­ های برگ را تحت تاثیر قرار داد. پیش تیمار بذر با پراکسید هیدروژن از طریق تأثیر مثبت بر روابط آبی گیاه، رنگیزه­ ها و نیز مساحت سطح برگ و روزنه اثر سوء شوری را بر عملکرد کاهش داد. گیاهان حاصل از بذرهای پیش تیمار شده با پراکسید هیدروژن از محتوای نسبی آب، رنگیزه کلروفیلی و کاروتنوئیدی بالاتر، مساحت سطح برگ بیشتر و تعداد روزنه کمتر و طول روزنه بیشتر تحت تنش شوری نسبت به شاهد برخوردار بوده و در عین حال دارای اثر سودمند پیش تیمار بذر با پراکسید هیدروژن بر کاهش اثر سوء تنش شوری بودند.

کلیدواژه‌ها


عنوان مقاله [English]

The Effects of Hydrogen Peroxide Pretreatment of Seeds on Morpho-Physiological and Biochemical Characteristics of Wheat under Salt Stress

نویسندگان [English]

  • Tayyebeh Jafarian 1
  • Mohammad Javad Zarea 2
1 Ph.D. Student of Crop Physiology, Faculty of Agriculture, University of Ilam, Ilam, Iran
2 Associate Professor, Department of Agronomy, Faculty of Agriculture, University of Ilam, Ilam, Iran
چکیده [English]

Salinity is one of the main factors to reduce crop production worldwide, especially in dry land farms. In this study the effect of pretreatment of wheat seed with hydrogen peroxide (H2O2) on various traits of wheat (Sardary) including morph-physiological parameters and yield components under salinity conditions were evaluated. This experiment was carried out in a randomized complete block design with three replications, in greenhouse. Treatments were three salinity levels (0, 80 and 120 Mm) and four concentrations of hydrogen peroxide (0, 25, 50 and 80 Mm). In this study, salinity affected all of yield components, levels of antioxidants, photosynthetic pigments, length and number of leaf stomata. Pretreatment of seed with hydrogen peroxide alleviated the effect of salinity on yield through positive effect on plant water relation, pigments, leaf area and stomata. Plants from pretreatment of seed with hydrogen peroxide had higher relative water content, chlorophyll and carotenoid pigments, leaf area and lower number of stomata and larger length of stomata under salt stress condition as compared with control. Seed pretreatment with hydrogen peroxide also reduced the adverse effect of salinity.

کلیدواژه‌ها [English]

  • Salinity
  • Morph-physiological parameters
  • H2O2
  • Wheat

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