Evaluation of selenium and salicylic acid effect on physiological and qualitative characteristics of dry-land wheat cultivars

Document Type: Full Article

Author

Department of Agronomy and plant breeding, Arak Branch, Islamic Azad University, Arak, I. R. Iran

Abstract

ABSTRACT-This experiment was carried out as factorial based on a randomized complete block design with three replications at the research station of the Islamic Azad University-Arak Branch, Iran, in 2011 and 2012. Experimental factors consisted of three levels of salicylic acid (SA); seed priming with distilled water (hydro priming), seed priming with 0.5 mM SA, and 0.5 mM SA  seed priming 1 mM SA spraying; two levels of selenium (Se); 0 and 20 g ha-1, and three rain-fed wheat cultivars: Azar 2, Sardari, and Rasad. The results showed that SA seed priming combined with foliar application together with spraying of Se increased the relative water content in Azar 2 and Rasad cultivars compared to the hydro priming. The foliar application of Se increased the leaves proline amounts and grain Se concentration in wheat cultivars. Priming with SA combined with a spray of Se decreased the electrolyte leakage by 32% as compared to the control. The application of SA combined with foliar application of Se increased the proline amounts of leaves and grain Se concentration. Seed priming of SA in combination with foliar application of Se increased the grain gluten content in Sardari and Rasad cultivars. The highest productivity index (63.12%) and grain yield (1585.01 kg ha-1) were obtained from Azar 2 cultivar. The results suggested that applying SA and Se may help in alleviating damage and improving the tolerance of drought stress and grain quality in wheat.

Keywords


Article Title [Persian]

بررسی تاثیر سلنیوم و سالیسیلیک اسید بر خصوصیات فیزیولوژیکی و کیفیت دانه در ارقام گندم دیم

Author [Persian]

  • نورعلی ساجدی
گروه زراعت و اصلاح نباتات، واحد اراک- دانشگاه آزاد اسلامی ، اراک، ایران
Abstract [Persian]

چکیده - این آزمایش به صورت فاکتوریل در قالب طرح بلوک­های کامل تصادفی در سه تکرار در سال­های 1390و 1391 در مزرعه تحقیقاتی دانشگاه آزاد اسلامی واحد اراک اجرا شد. عوامل مورد آزمایش شامل سالیسیلیک اسید در سه سطح شامل پیش تیمار بذر با آب مقطر، پیش تیمار بذر با 5/0 میلی مولار سالیسیلیک اسید، پیش تیمار بذر با5/0 میلی مولار سالیسیلیک اسید توام با محلول پاشی 1 میلی مولار سالیسیلیک اسید، سلنیوم در دو سطح، بدون مصرف و محلول­پاشی 20 گرم در هکتار و سه رقم گندم شامل آذر 2، سرداری  و رصد بودند. نتایج نشان داد که پیش تیمار بذر توام با محلول پاشی با سالیسیلیک اسید محتوای آب نسبی برگ در ارقام آذر 2 و رصد را نسبت به شاهد افزایش داد. محلول­پاشی با سلنیوم مقدار پرولین در برگ و غلظت سلنیوم در دانه را در ارقام گندم افزایش داد. پیش تیمار بذر توام با با سالیسیلیک اسید توام با محلول­پاشی با سلنیوم میزان نشت یونی را 32 درصد نسبت به شاهد کاهش داد. محلول­پاشی سالیسیلیک اسید توام با سلنیوم مقدار پرولین برگ و غلظت سلنیوم دانه را افزایش داد. پیش تیمار با سالیسیلیک اسید توام با محلول­پاشی سلنیوم مقدار گلوتن دانه را در ارقام رصد و سرداری افزایش داد. بیشترین شاخص بازآوری (12/63%) و عملکرد دانه (01/1585 کیلوگرم در هکتار) از رقم آذر 2 حاصل شد. نتایج نشان داد که کاربرد سالیسیلیک اسید و سلنیوم می تواند خسارت ناشی از تنش خشکی را تعدیل نماید و تحمل به تنش خشکی و کیفیت دانه در گندم را بهبود دهد.

Keywords [Persian]

  • واژه های کلیدی:
  • نشت یونی
  • عملکرد دانه
  • محتوی پرولین برگ
  • محتوی گلوتن مرطوب
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