اثر پیش‌تیمار بذر با نانولوله‌های کربنی بر جوانه‌زنی و رنگیزه‌های فتوسنتزی ذرت تحت تنش خشکی

نوع مقاله: پژوهشی

نویسندگان

گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه شاهد، تهران، ایران

10.22034/aej.2019.1867216.1094

چکیده

این پژوهش با هدف بهبود کمی و کیفی جوانه­ زنی بذر دو هیبرید ذرت با کاربرد نانولوله­ های کربنی تحت شرایط تنش خشکی به ­صورت آزمایش فاکتوریل در قالب طرح کاملاً تصادفی در آزمایشگاه فناوری بذر دانشگاه شاهد انجام شد. تنش خشکی با پلی­ اتیلن ­گلایکول 6000 در سطوح 5/0- و 1- مگاپاسکال بر بذور پیش­ تیمار شده با غلظت­ های 25 و 50 میلی ­گرم بر لیتر نانولوله ­های کربنی دو  هیبرید ذرت فجر و دهقان اعمال شد. نانوپرایمینگ تحت تنش خشکی توانست بر درصد و سرعت جوانه­زنی، شاخص وزنی و طولی بنیه گیاهچه و محتوای کلروفیل a، b و کل و محتوای کارتنوئید دو هیبرید ذرت مؤثر باشد. کاربرد 25 میلی­گرم بر لیتر نانوله­ های کربن در تنش 1- مگاپاسکال بر بهبود جوانه­ زنی هیبرید دهقان و فجر اثرگذار بود. همچنین کاربرد 50 میلی­گرم بر لیتر نانوله­های کربن بر بهبود صفات محتوای رنگیزه­های فتوسنتزی در تنش 1- مگاپاسکال مؤثر بود. در مجموع، پیش­تیمار بذر ذرت با لوله­ های کربنی موجب بهبود صفات جوانه­زنی و رنگیز­های فتوسنتزی در شرایط تنش خشکی شد. بنابراین، برای بهبود وضعیت جوانه ­زنی بذور ذرت در مناطق خشک و نیمه­ خشک، استفاده از روش پیش­ تیمار بذر با غلظت­ 25 میلی ­گرم بر لیتر نانولوله­ های کربنی توصیه می­شود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of carbon nanotubes seed priming on germination and photosynthetic pigmentation of maize hybrids under drought stress

نویسندگان [English]

  • Abolfazl Shahriari
  • Heshmat Omidi
  • Hossein Mohammadi
  • Abolfazl Mohammadi
  • khadijeh Ahmadi
Department of Agronomy and Plant Breeding, Faculty of Agricultural Sciences, Shahed University, Tehran, Iran
چکیده [English]

To investigation the effect of carbon nanotubes (CNTs) seed priming to enhance seed germination quantity and quality of corn hybrids under drought stress, an experiment was conducted as factorial based on completely randomized design at Seed Technology Laboratory of Shahed University, Tehran, Iran. Drought stress induced by -0.5 and -1 Mpa polyethylene glycol solution on Fajr and Dehghan maize hybrids and the seeds primed by 25 and 50 mg/L CNTs. Nano-priming under drought stress was effective on germination percentage and rate, weight and length, chlorophyll a, b, and total chlorophyll and carotenoid contents of maize seedlings. Application of 25 mg/L CTNs at -1 Mpa drought stress effectively enhanced germination percentage of maize seed. Also, application of 50 mg/L CTNs improved photosynthetic pigmentation at -1 Mpa drought stress. Generally, CTNs priming improved seed germination traits and photosynthetic pigmentation of maize seedlings under drought stress conditions. Therefore, priming by 25 mg/L CTNs is recommended to improve maize seeds germination indices in arid and semi-arid regions.

کلیدواژه‌ها [English]

  •  Dehghan hybrid
  •  Fajr hybrid
  •  nanopriming
  •  seed priming
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