تأثیر تنش‌های خشکی و شوری بر برخی از خصوصیات مورفولوژیکی و فیزیولوژیکی گل نرگس ‏(‏Narsicuss tazetta L.‎‏)‏

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده کشاورزی، دانشگاه بیرجند، بیرجند، ایران

2 استادیا، دانشکده کشاورزی، دانشگاه بیرجند، بیرجند، ایران

3 دانشیار، دانشکده کشاورزی، دانشگاه بیرجند، بیرجند، ایران

چکیده

خشکی و شوری در بسیاری از مناطق جهان از مهم‌ترین عوامل محدودکننده رشد و نمو گیاهان به شمار می­روند. هدف از تحقیق حاضر بررسی اثر متقابل تنش‌های خشکی و شوری بر برخی از فاکتورهای مورفولوژیکی و فیزیولوژیکی گل نرگس (Narcissus tazetta L.) بود. این آزمایش گلدانی، به‌صورت فاکتوریل در قالب طرح کاملا تصادفی با سه تکرار در دانشکده کشاورزی دانشگاه بیرجند در سال 1396 انجام شد. تیمارها شامل کلرید‌سدیم در چهار سطح 0 (شاهد)، 40،20 و 60 میلی‌مولار و تنش خشکی در چهار سطح 70،50،30 و 90 درصد ظرفیت زراعی بودند. نتایج نشان داد تنش‌های خشکی و شوری باعث کاهش معنی‌دار طول و عرض برگ، وزن خشک اندام هوایی و سوخ، طول ساقه گل‌دهنده و قطر گل، محتوای نسبی آب و محتوای کلروفیل شدند. با این وجود، تأثیر تنش‌های شوری و خشکی و اثر متقابل آنها بر کاهش تعداد گل در ساقه گل‌دهنده معنی‌دار نبود. در مقابل مقادیر نشت­یونی و محتوای پرولین تحت تأثیر این دو تنش افزایش یافتند. به‌طور کلی، نتایج نشان داد در محدوده تیمارهای اعمال شده، اثرات مخرب تنش شوری بر صفات رشدی، زینتی و فیزیولوژیکی گل نرگس بیشتر از تنش خشکی بود.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of drought and salinity stresses on some morphological and physiological ‎characteristics of Narcissus tazetta L. flower

نویسندگان [English]

  • Ali Naseri Moghadam 1
  • Hassan Bayat 2
  • Mohammad Hossein Aminifard 3
  • Farid Moradinezhad 3
1 M. Sc. Student, Faculty of Agriculture, University of Birjand, Birjand, Iran
2 Assistant Professor, Faculty of Agriculture, University of Birjand, Birjand, Iran
3 Associated Professor, Faculty of Agriculture, University of Birjand, Birjand, Iran
چکیده [English]

Drought and salinity are among the most important factors limiting plant growth in many parts of the world. The purpose of this study was to investigate the interaction effects of drought and salinity stresses on some morphological and physiological factors of Narcissus tazetta L. This pot experiment was conducted as a factorial based on completely randomized design with three replications at the Faculty of Agriculture, University of Birjand in 2017.The treatments included sodium chloride (NaCl) in four levels 0 (control), 20, 40 and 60 mM and drought stress in four levels 30, 50, 70 and 90% of field capacity.The results showed that salinity and drought stresses decreased length and width of leaf, dry weight of shoot and bulb, relative water content and chlorophyll content. However, the effects of salinity and drought stress and their interaction on reducing the number of flowers in flowering stem were not significant. In contrast, electrolyte leakage and proline content were increased under these two stresses. In general, the results showed that in the range of applied treatments, the destructive effects of salinity stress on growth, ornamental and physiological traits of N. tazetta flower were more than drought stress.

کلیدواژه‌ها [English]

  • Chlorophyll content
  • electrolyte leakage
  • flower diameter
  • flower number
  • proline

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علوم باغبانی ایران
دوره 51، شماره 1
خرداد 1399
صفحه 79-90

فایل ها

سابقه مقاله

  • تاریخ دریافت: 17 شهریور 1397
  • تاریخ بازنگری: 11 آذر 1397
  • تاریخ پذیرش: 17 آذر 1397

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