بررسی پاسخ خصوصیات مورفولوژیک، فیزیولوژیک و بیوشیمیایی گیاه همیشه‌بهار به پیش‌تیمار بذری و محلول‌پاشی 24-اپی‌براسینولید

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان - ایران

2 دانشیار گروه مهندسی علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان – ایران

3 استادیار گروه مهندسی علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان - ایران

چکیده

به منظور بررسی تأثیر پیش‏تیمار‏‏ بذری و محلول‏پاشی 24-اپی براسینولید بر برخی ویژگی‏های مورفولوژیک، فیزیولوژیکی و بیوشیمیایی گیاه همیشه ‏بهار آزمایشی به صورت فاکتوریل در قالب طرح کاملاً ‏تصادفی با سه تکرار در گلخانه تحقیقاتی دانشگاه شهید باهنر کرمان، در سال 1393 انجام گرفت. تیمارهای آزمایش شامل پیش‏تیمار‏ بذری و محلول‏پاشی 24-اپی براسینولید با چهار غلظت (0، 1/0، 1 و 10  میکرومولار) بود. نتایج نشان داد که خصوصیات رشدی و رنگیزه‏های فتوسنتزی با کاربرد این تنظیم‌کننده رشد به صورت پیش‏تیمار و محلول‏پاشی افزایش یافت. بیشترین وزن تر اندام هوایی، ریشه، وزن تر و خشک گل در تیمار ترکیبی (پیش‏تیمار 1/0 میکرومولار + محلول‏پاشی 1/0 میکرومولار) بود که به‌ترتیب موجب افزایش­­ 79، 33، 28 و 26 درصد نسبت به تیمار شاهد گردید. همچنین، بیشترین میزان رنگیزه‏های فتوسنتزی در ترکیب مذکور یافت شد، به گونه‏ای که به ترتیب موجب افزایش کلروفیل a، b، کل و کارتنوئید حدود 4/2، 1/3، 58/2 و 7/2 برابر در مقایسه­­­­­­­­­­­­ ­­با شا­هد گردید. این ترکیب سبب افزایش 35 درصدی پروتئین و 3/18 درصدی قندهای احیا نسبت به شاهد شد. نتایج حاصل از پژوهش حاضر نشان داد که 24-اپی براسینولید می‌تواند با افزایش وزن گل و اندام هوایی موجب افزایش رشد و نمو و عملکرد بستری گیاه همیشه‌بهار در فضای سبز گردد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation the response of morphological, physiological and biochemichal attributes of marigold to seed priming and 24-epibrassinolide foliar

نویسندگان [English]

  • Zahra Sardoei Kara 1
  • Vahid Reza Saffari 2
  • Iraj Tavassolian 3
1 Former M.Sc. Student, Department of Horticultural Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman - Iran
2 Associate Professor, Department of Horticultural Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman - Iran
3 Associate Professor, Department of Horticultural Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman – Iran
چکیده [English]

To investigate the effects of priming and foliar spray by 24-epibrassinolide (EBR) on some of Marigold morphological, biological and biochemical traits, an experiment was conducted as factorial on completely randomized design with three replications at experimental laboratory of department of horticulture, Shahid Bahonar University of Kerman in 2014. Each of priming and foliar spray of EBR had four concentrations (0, 0.1, 1 and 10 µM). Results showed that growth parameters and photosynthetic pigments increased proportional to the increment of EBR in priming and foliar spray treatments. . The greatest shoot weight (79 percent), root (33 percent), fresh (28 percent) and dry (26 percent) weights of pot marigold compared to control were obtained at priming with 0.1 µM plus foliar spray at 0.1 µM of EBR.   Furthermore, the highest chlorophyll a, b, total chlorophyll and carotenoids were found at the same concentration (0.1 µM priming + 0.1 µM foliar spray of EBR) with 2.4, 3.1, 2.6 and 2.7 percent increase respectively. The EBR increased protein and reduced sugar up to (35 percent) and (18.3 percent) compared with control. The results of this experiment indicated that application of EBR can be used to improve the growth and development traits of pot marigold.

کلیدواژه‌ها [English]

  • Growth regulation
  • Growth parameters
  • photosynthetic pigments
  • protein
  • reduced sugar
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