علوم و فناوری فضایی

علوم و فناوری فضایی

مکانیسم رشد گیاه بابونه آلمانی (Matricaria chamomilla) تحت سیستم نوری فضایی: القای سنتز رنگیزه، سیستم دفاع آنزیمی و متابولیت‌های آنتی اکسیدانی

نوع مقاله : مقالة‌ پژوهشی‌

نویسنده
حلیمه حسن پور
استادیار، پژوهشگاه هوافضا، وزارت علوم تحقیقات و فناوری، تهران، ایران
10.30699/jsst.2023.1412
چکیده
نور یکی از فاکتورهای حیاتی برای کشت گیاهان است. لامپ‌های ال‌ای‌دی با طیف‌های نوری مختلف دارای مزایایی نظیر تولید گرمای کم، نیازمندی به انرژی پایین و طول عمر بالا بوده که اولین بار برای طراحی اتاقک‌های رشد گیاه در سیستم‌های کشت بسته و تحقیقات فضایی استفاده شدند. در این پژوهش، اثر طیف‌های نوری بر مکانیسم رشد گیاه داروئی بابونه آلمانی با بررسی محتوای رنگیزه، سیستم دفاع آنزیمی و متابولیت‌های ثانوی ارزیابی شد. بذرها پس از کشت در محیط موراشیگ و اسکوگ تحت طیف‌های سفید، قرمز، آبی و قرمز-آبی قرار گرفتند. گیاهچه‌ها بعد از 4 هفته برداشت شده و تحت آنالیزهای رشد و بیوشیمیایی قرار گرفتند. نتایج نشان داد که نور قرمز-آبی سبب القای وزن تر و خشک، طول ریشه، تعداد ریشه‌های جانبی، محتوای کلروفیل، پروتئین، فلاونوئید و آنزیم‌های آنتی‌اکسیدانی سوپراکسید دیسموتاز و کاتالاز شد. طیف آبی طول ساقه را کاهش و محتوای نسبی آب را افزایش داد. بالاترین مقدار هیدروژن پراکسید در گیاهچه‌های تیمار شده با نور قرمز مشاهده شد. بنظر میرسد طیف‌های نوری با تغییر سطح هیدروژن پراکسید در تنظیم فعالیت آنزیم‌های آنتی‌اکسیدانی و تجمع متابولیت‌های ثانوی نقش دارند و نور قرمز-آبی می‌تواند به عنوان طیف نوری مناسب برای طراحی اتاقک کشت گیاه بابونه در تحقیقات فضایی استفاده شود.
کلیدواژه‌ها
طیف‌های نوری
بابونه آلمانی
رنگیزه کلروفیل
هیدروژن پراکسید
فلاونوئید
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  • تاریخ دریافت 24 تیر 1401
  • تاریخ بازنگری 07 آذر 1401
  • تاریخ پذیرش 14 بهمن 1401
  • تاریخ اولین انتشار 14 بهمن 1401