تأثیر اسید سالیسیلیک بر تغییرپذیری روزنه و برخی صفات رویشی گیاه همیشه بهار (Calendula officinalis L.) در تنش شوری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، دانشکدة کشاورزی، دانشگاه شهید باهنر کرمان

2 دانشیار پژوهشکدة باغبانی، دانشگاه شهید باهنر کرمان

چکیده

شوری یکی از عامل‌های مهم محیطی است که رشد گیاهان را محدود می‌کند. به‌منظور بررسی تأثیر اسید سالیسیلیک بر برخی صفات رویشی و تغییرپذیری روزنة گیاه همیشه بهار، آزمایشی به‌صورت فاکتوریل بر پایة طرح کامل تصادفی با پنج تکرار در گلخانة تحقیقاتی دانشگاه شهید باهنر کرمان در سال 1391 انجام شد. شوری به‌عنوان عامل اول با پنج سطح 1، 3، 5، 7 و 9 میلی‌موس بر سانتی‌متر و اسید سالیسیلیک به‌عنوان عامل دوم با سه سطح 0، 100 و 200 میلی‌گرم بر لیتر در نظر گرفته شد. نتایج نشان داد که تنش شوری و اسید سالیسیلیک هر دو سبب کاهش طول و عرض روزنة برگ‌ها شدند. بالاترین سطح شوری، سبب کاهش وزن خشک اندام هوایی، ریشه و محتوای نسبی آب برگ‌ها به ترتیب به مقدار 51، 58 و 24 درصد نسبت به شاهد شد. کاربرد اسید سالیسیلیک موجب بهبود این صفات در همة سطوح شوری شد. در بالاترین سطح شوری کاربرد محلول 200 میلی‌گرم بر لیتر اسید سالیسیلیک، به ترتیب موجب افزایش 24 و 28 درصدی وزن خشک اندام هوایی و ریشه و محلول 100 میلی‌گرم بر لیتر سبب افزایش 9 درصدی محتوی نسبی آب برگ نسبت به بدون کاربرد آن‌ها شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Salicylic acid effects on stomatal characteristics and some growth of calendula plants (Calendula officinalis L.) under salt stress

نویسندگان [English]

  • Fatemeh Dehghan Nayeri 1
  • vahid reza safari 2
  • Ali Akbar Maghsoudi Moud 2
2 shahid bahonar University of Kerman
چکیده [English]

In order to investigate the effects of salicylic acid on some growth and stomatal characteristics of calendula plant, a factorial experiment was conducted based on completely randomized design with five replications in the research Greenhouse of Shahid Bahonar University of Kerman in 2013. Salt stress levels including 1, 3, 5, 7 and 9 mmhos/cm were applied to the soil and salicylic acid solutions with 0, 100 and 200 mg/lit concentration were sprayed on plants. Results showed that both salt stress and salicylic acid reduced length and width of stomata. Compared to the control conditions, highest level of salt stress reduced plant shoot and root dry matter and also relative water content to 51, 58 and 24 percent, respectively. However, application of salicylic acid improved all these characteristics at all applied levels of salt stress. Compared to the control conditions, application of 200 mg/lit solution of salicylic acid increased plant shoot and root dry matter (24 and 28%), respectively. Meanwhile, 100 mg/lit salicylic acid solution increased the relative water content (9%) compared to the control.

کلیدواژه‌ها [English]

  • dry matter
  • relative water content
  • Salicylic Acid
  • salinity
  • stomatal length and width

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سابقه مقاله

  • تاریخ دریافت: 15 شهریور 1393
  • تاریخ بازنگری: 19 آبان 1393
  • تاریخ پذیرش: 29 آذر 1393

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