تأثیر تنش کمبود آب بر محتوای قندهای محلول، پرولین، سبزینۀ برگ و پروتئین دانه در برخی دورگ‌های آفتابگردان (Helianthus annuus L.)

نوع مقاله : مقاله پژوهشی

نویسنده

دانشیار گروه زراعت، دانشگاه پیام نور، صندوق‌پستی 3697-19395، تهران، ایران

چکیده

به‌منظور شناسایی سازوکار‌های مقاومت به تنش کمبود آب و معرفی دورگ‌های برتر آفتابگردان، آزمایشی در سال ۱۳۹۳ در مزرعۀ‌ تحقیقاتی واقع در استان البرز، شهرستان هشتگرد به صورت کرت‌های خردشده در قالب طرح پایۀ بلوک کامل تصادفی اجرا شد. عامل اصلی شامل سطوح آبیاری (آبیاری معمولی، کمبود آب متوسط و شدید که به ترتیب پس از 50، 100 و 150 میلی­متر تبخیر تجمعی از تشت تبخیر کلاس A انجام شد) و عامل فرعی شامل چهار دورگ آفتابگردان (فرخ، آلستار، قاسم و هایسان 25) بود. در این پژوهش غلظت قندهای محلول کل، پرولین، محتوای سبزینۀ (کلروفیل) برگ و پروتئین دانه، عملکرد دانه و روغن اندازه­گیری شد. بنا بر نتایج به‌دست‌آمده با افزایش تنش کمبود آب غلظت قندهای محلول کل، پرولین و سبزینۀ b در برگ‌ها افزایش نشان داد. مقایسۀ میانگین‌ها نشان داد دورگ آلستار بالاترین میزان کل قندهای محلول (05/176 میلی‌گرم در گرم بافت تازۀ برگ)، پرولین (43/45 میلی‌گرم در لیتر) و سبزینۀ b (52/12 میلی‌گرم در گرم بافت تازۀ برگ) را داشت. همچنین دورگ آلستار بالاترین میزان عملکرد دانه و روغن را در شرایط تنش کمبود آب میانگین به ترتیب به میزان 2121 و 956 کیلوگرم در هکتار و در شرایط تنش کمبود آب شدید به ترتیب به میزان 829 و 10/315 کیلوگرم در هکتار را به خود اختصاص داد. در شرایط آبیاری معمولی دورگ فرخ بالاترین میزان عملکرد دانه (3448 کیلوگرم) و عملکرد روغن (1672 کیلوگرم) را تولید کرد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of water deficit stress on soluble sugars, proline, protein and chlorophyll content in Sunflower (Helianthus annuus L.) hybrids

نویسنده [English]

  • Kamal Sadat Asilan
چکیده [English]

Mechanisms of tolerance to water deficiency stress for introducing sunflower hybrid was investigated by a two-factor experiment as a split plot design based on RCBD was at the research station in Alborz province, Hashtgerd region, Iran in 2013. Irrigation rates (irrigation after 50, 100 and 150 mm cumulative evaporation from class A evaporation pan) were considered in the main plots and sunflower hybrids (Farokh, Allstar, Ghasem, Hysun 25) as sub plots. In this study, the amount of soluble sugars, proline, protein, chlorophyll content, oil content and yield, protein yield and some agronomic characteristics were determined. Based on the results, the amount of total soluble sugars, proline and chlorophyll-b contents as mechanisms to resist water deficit stress significantly increased with increased water deficit stress. Allstar hybrid had the highest amount of total soluble sugars (176.05 mg/g f. w), proline (45.43 mg/lit) and chlorophyll-b (12.52 mg/g f. w). Also, Allstar produced the highest grain yield and oil content in both mean water deficit stress conditions with values 2121 and 956.90 kg/ha, and in severe water deficit stress condition with values 829 and 315.10 kg/ha, respectively. However, with normal irrigation, Farokh hybrid had highest grain yield and oil yield.

کلیدواژه‌ها [English]

  • Chlorophyll
  • Grain yield
  • proline
  • water deficit stress
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