نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران.

2 استادیار، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

چکیده

این پژوهش به منظور بررسی پاسخ‌های مورفوفیزیولوژیکی چمن آفریقایی(Cynodon dactylon (L.) Pers) به تنش کم‌آبی و کاربرد سدیم نیتروپروساید در سال 1394 در گروه علوم باغبانی دانشگاه زنجان انجام شد. سه سطح آب قابل دسترس خاک (40، 70 و 100 درصد) و سدیم نیتروپروساید (صفر، 250 و 500 میکرومولار) به‏صورت یک آزمایش فاکتوریل در قالب طرح کاملاً تصادفی در چهار تکرار اعمال شدند. تنش کم آبی محتوای نسبی آب برگ و رشد شاخساره را کاهش داد. در صورتی‏که رشد ریشه، نسبت ریشه به شاخساره، ظرفیت آنتی اکسیدانی، نشت یونی، پرولین، فنل کل، و میزان کلروفیل برگ‌ها با کاهش آب قابل دسترس خاک افزایش یافت. کاربرد سدیم نیتروپروساید از طریق افزایش ظرفیت آنتی اکسیدانی، میزان پرولین و کلروفیل برگ‌ها و همچنین کاهش نشت یونی، اثرات منفی تنش کم‌آبی را بهبود بخشید و این اثر در غلظت 500 میکرومولار واضح تر بود. از این‌رو آزمایش غلظت‌های بالاتر این ماده پیشنهاد می شود.

کلیدواژه‌ها

عنوان مقاله [English]

The study of morphological, biochemical and physiological of bermuda grass as affected by sodium nitroprosside under water deficit stress

نویسندگان [English]

  • Soheila Taheri 1
  • Masoud Arghavani 2
  • Seyed Najmadin Mortazavi 2

1 Graduated M.Sc. Student/University of Zanjan

2 academic staff/University of Zanjan

چکیده [English]

This experiment was conducted in order to investigate morphophysiologycal responses of bermuda grass (Cynodon dactylon (L.) Pers.) to water deficit stress and sodium nitroprosside application in Horticultural Science Department at the University of Zanjan in 2015. Three soil available water levels (40, 70 and 100%) and sodium nitroprosside (0, 250 and 500 micromolar) were applied in a factorial experiment based on completely randomized design with four replications. Water deficit reduced leaves relative water content and shoot growth whereas, root growth, root to shoot ratio, leaves antioxidant capacity, electrolyte leakage, proline, total phenol and chlorophyll content increased with decreasing soil available water. Sodium nitroprosside application moderated the adverse effects of water deficit in bermuda grass by increasing leaves antioxidant capacity, proline, and chlorophyll content as well as reducing electrolyte leakage and this effect was more pronounced in 500 micromolar, suggesting that higher concentrations of sodium nitroprosside must be evaluated.

کلیدواژه‌ها [English]

  • Available water
  • Chlorophyll
  • nitric oxide
  • proline
  • shoot growth
  • total phenol
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