اثر رژیم‌های مختلف آبیاری و اسید سالیسیلیک بر ویژگی های مورفوفیزیولوژیکی گیاه همیشه‌بهار (Calendula officinalis L.) در شرایط اقلیمی زنجان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، دانشکدۀ کشاورزی، دانشگاه زنجان

2 استادیار، دانشکدۀ کشاورزی، دانشگاه زنجان

3 دانشیار، دانشکدۀ کشاورزی، دانشگاه زنجان

چکیده

به‌منظور ارزیابی اثر اسید سالیسیلیک بر برخی از ویژگی­های مورفوفیزیولوژیک گیاه همیشه‌بهار در شرایط کم­آبی، آزمایشی به‌صورت کرت­های خرد شده بر پایۀ طرح بلوک­های کامل تصادفی در سه تکرار در شرایط اقلیمی زنجان اجرا شد. تیمار­های آزمایش شامل سه رژیم آبیاری مختلف (33، 66 و 100 درصد نیاز آبی گیاه) به‌عنوان عامل اصلی و اسید سالیسیلیک در چهار سطح (0، 5/0، 1 و 5/1 میلی­مولار) به‌عنوان عامل فرعی بودند. بر پایۀ نتایج به‌دست‌آمده از این پژوهش تنش کم­آبی به‌طور معنی­داری میزان پرولین و فعالیت آنزیم پراکسیداز را افزایش داده و ارتفاع، وزن تر و درصد وزن خشک اندام‌های هوایی، شمار گل، طول عمر گل و محتوای نسبی آب برگ را کاهش داد. کاربرد برگی اسید سالیسیلیک در شرایط تنش کم­آبی در غلظت 1 میلی­مولار به‌طور معنی­داری باعث افزایش وزن تر و درصد وزن خشک اندام هوایی، شمار گل، طول عمر گل، محتوای نسبی آب برگ، فعالیت آنزیم پراکسیداز و میزان پرولین شد. با توجه به نتایج این پژوهش کاربرد برگی اسید سالیسیلک توانست واکنش گیاه در برابر تنش کم­آبی را در بیشتر صفات در سطح احتمال 1 درصد بهبود بخشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of different irrigation regimes and salicylic acid on morphophysiological characters of Calendula officinalis L. under zanjan climate conditions

نویسندگان [English]

  • Roghayeh Molae 1
  • Mitra Aelaei 2
  • Masood Arghavani 2
  • Jafar Nikbakht 3
1 Former M.Sc. Student, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2 Assistant Professors, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
3 Associate Professor, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
چکیده [English]

In order to evaluatethe effect of salicylic acid on some morpho physiological charactristics of Calendula officinalis.L. under water deficit stress, an experiment was set out  in split plot design based on RCBD with three replications under Zanjan climate conditions. Treatments consisted of 3 different irrigation regimes(100, 66, 33% ETC) as main plot and SA at 4 levels (0, 0.5, 1, 1.5 mM) as sub plots. Results indicated that, water deficit stress significantly increased proline content and peroxidase enzyme activity and reduced height, fresh and dry weights of shoot, flower number, flower vase life and leaf relative water content (RWC). Foliar application of SA at the 1 mM significantly increased fresh and dry weight of shoot, flower number, flower vase life, relative water content (RWC), peroxidase enzyme activity and proline content under water deficit stress. According to the results of this research, foliar application of salicylic acid could improve plant response in most traits at 1% level to drought stress.

کلیدواژه‌ها [English]

  • Flower number
  • leaf relative water content (RWC)
  • Peroxidase
  • proline
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