Effect of Different Drying Methods on Some Biochemical Properties of Iranian Ox-tongue (Echium amoenum Fisch. & Mey.)

Document Type: Original article


Department of Horticulture, Islamic Azad University, Isfahan (Khorasgan) Branch. Isfahan, Iran;


Background & Aim:Iranian ox-tongue (Echium amoenum Fisch. & Mey.) is an endemic Iranian medicinal plant belongs to Boraginaceae family. The violet-blue petals of this plant have been used in traditional medicine. Drying is one of the most critical and fundamental operations in the post-harvest processing of medicinal plants.
Experimental: This research was carried out in Islamic Azad University, Isfahan (Khorasgan) branch in 2015. The experiment was arranged based on completely randomized design with three repetitions. Drying methods are including sun and shade drying, oven-drying (45, 65 and 85C) and microwave drying (200, 300 and 400 W). Drying time of Iranian Ox-tongue petals and some biochemical properties such as total chlorophyll, the amount of carotenoids, anthocyanin content and total flavonoids were measured.
Results: The results showed that different drying methods had significant effects on drying time, chlorophyll, carotenoids, total flavonoid and anthocyanin contents of Iranian ox-tongue petals. The maximum and minimum drying times were measured in shade drying and microwave 400 W, respectively. The anthocyanin content gradually decreased with the increase of oven temperatures and microwave powers. Also shade drying method had the highest amount of total chlorophyll and carotenoids. Generally, regarding the biochemical composition, traditional shade drying is the optimum method for dying of Iranian ox-tongue petals.
Recommended applications/industries: According to this study, shade drying could be recommended in terms of qualitative characteristics of mentioned medicinal plant.


Article Title [Persian]

اثر روش‌های مختلف خشک‌کردن بر برخی ویژگی‌های بیوشیمیایی گل گاوزبان ایرانی

Authors [Persian]

  • آرش سعیدی
  • حسینعلی اسدی قارنه
گروه علوم باغبانی دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان)، اصفهان، ایران
Abstract [Persian]

مقدمه و هدف: گل گاوزبان ایرانی(Echiumamoenum Fisch. &Mey)از گیاهان دارویی اندمیک ایران و متعلق به خانواده براژیناسه است که گلبرگ‌های بنفش آن از زمان‌های گذشته در طب سنتی مورد استفاده قرار می‌گرفته است. خشک‌کردن از مهم‌ترین فرآیندهای پس از برداشت گیاهان دارویی است که می‌تواند بر ویژگی‌های کیفی آن‌ها مؤثر باشد.
روش‌ تحقیق: این پژوهش در سال 1394 در قالب طرح کاملاً تصادفی و در سه تکرار در دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان) انجام شد. روش‌های مختلف خشک‌کردن شامل خشک‌کردن در سایه، آفتاب و استفاده از دماهای مختلف آون (45، 65 و 85 درجه سانتی‌گراد) و توان‌های مختلف میکروویو (200، 300 و 400 وات) بودند. مدت زمان خشک‌شدن گلبرگ‌های گل گاوزبان ایرانی، کلروفیل کل، میزان کارتنوئیدها، آنتوسیانین کل و فلاونوئیدهای نمونه‌های مورد ارزیابی از مهم‌ترین صفات اندازه‌گیری شده بودند.
نتایج و بحث: نتایج نشان داد روش‌های مختلف خشک‌کردن تأثیر معنی‌داری بر زمان خشک‌شدن، میزان کلروفیل کل، محتوای کارتنوییدها، فلاونوئیدها و آنتوسیانین کل دارد. بیشترین و کم‌ترین زمان خشک‌شدن به‌ترتیب در روش‌های سایه خشک و توان 400 وات مایکروویو مشاهده شد. میزان آنتوسیانین کل با افزایش دمای آون و توان مایکروویو کاهش یافت. همچنین بیشترین مقادیر کلروفیل کل و کارتنوئید در روش سایه- خشک اندازه‌گیری شدند.
توصیه کاربردی/ صنعتی: بر اساس نتایج این پژوهش، جهت خشک‌کردن گلبرگ‌های گاوزبان ایرانی، روش سایه- خشک به دلیل حفظ ویژگی‌های کیفی آن پیشنهاد می‌شود.

Keywords [Persian]

  • روش‌های خشک‌کردن
  • گل گاوزبان ایرانی
  • محتوای رنگدانه
  • خشک‌کردن سنتی

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