تأثیر تنش کم‌آبی بر برخی شاخص‌های فیزیولوژی و کارایی مصرف آب در توده‌های خربزۀ ایرانی

نوع مقاله: مقاله کامل

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکدۀ کشاورزی، دانشگاه زنجان

2 استادیار، دانشکدۀ کشاورزی، دانشگاه زنجان

چکیده

به‌منظور ارزیابی تحمل به تنش کم‌آبی برخی از توده­های خربزۀ ایرانی، آزمایشی به‌صورت کرت‌های خردشده در قالب طرح بلوک‌های کامل تصادفی در سه تکرار در ایستگاه تحقیقاتی دانشکدۀ کشاورزی دانشگاه زنجان انجام شد. تیمارهای آزمایش شامل سه سطح آبیاری (۱۰۰، 66 و ۳۳ درصد نیاز آبی گیاه) و هفت تودۀ خربزه شامل کالی، اورشنگ، موری، موزی، شیرازی، ازمیر و ایوانکی بود. بر پایۀ نتایج به‌دست‌آمده در این پژوهش تنش کم­آبی به‌طور معنی‌داری میزان پرولین، فعالیت آنزیم‌های کاتالاز و پراکسیداز را افزایش داده و محتوای نسبی آب برگ، عملکرد و میزان ویتامین ث را کاهش داد. بالاترین میزان کارایی مصرف آب در آبیاری 66 درصد مشاهده شد. بین توده‌ها نیز از نظر شاخص­های فیزیولوژیکی تفاوت معنی­داری مشاهده شد. بیشترین میزان پرولین، ویتامین ث و درصد محتوای نسبی آب برگ در توده­های کالی و موری، بیشترین فعالیت آنزیم پراکسیداز در تودۀ ازمیر و بیشترین کارایی مصرف آب و عملکرد در تودۀ موزی به دست آمد. با توجه به نتایج این پژوهش، تودۀ ایوانکی با بیشترین کاهش در عملکرد و تودۀ موزی با کمترین کاهش در عملکرد در اثر افزایش تنش کم‌آبی به ترتیب حساس‌ترین و متحمل‌ترین توده نسبت به تنش کم‌آبی بودند.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of water deficit stress on some physiological traits and water use efficiency of some Iranian melon landraces

نویسندگان [English]

  • Hadi Lotfi 1
  • Taher Barzegar 2
  • Fatemeh Nekonam 2
1 M.Sc. Student, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2 Assistant Professor, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
چکیده [English]

In order to evaluate some Iranian melon landraces for water stress tolerance, an experiment was set out in a split plot design based on RCBD with three replicates in research field of University of Zanjan. Treatments were consisted of three irrigation levels (100, 66 and 33% of ETC) as main plots and 7 landraces of Iranian melon as subplots (‘Kali’, ‘Orshang’, ‘Mouri’, ‘Mozi’, ‘Shirazi’, ‘Ezmir’ and ‘Eyvanekey’). The results indicated that water deficit stress significantly increased proline content, peroxidase and catalase activity and reduced leaf relative water content (RWC), yield and vitamin C content. The highest water use efficiency (WUE) was observed in 66% water stress. The landraces had significant difference for physiological traits. The highest values of RWC, proline and vitamin C content were obtained in landraces of ‘Kali’ and ‘Mouri’. Also the highest POX activity, WUE and yield were obtained in landraces of ‘Ezmir’ and ‘Mozi’, respectively. According to the results ‘Eyvanekey’ and ‘Mozi’ with highest and lowest yield reduction under water deficit stress was tolerant and sensitive landraces respectively.

کلیدواژه‌ها [English]

  • Antioxidant
  • proline
  • vitamin c
  • Yield
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