Petal micromorphology of some Rosa species in Iran

Document Type : Research Paper

Authors

1 PhD Student, Department of Plant Biology, College of Science, University of Tehran, Tehran, Iran

2 Assistant Prof., Department of Plant Biology, College of Science, University of Tehran, Tehran, Iran

10.22092/bot.j.iran.2024.366501.1392

Abstract

The micromorphological characteristics of the upper and lower epidermis of the petals of 15 Rosa species in Iran were investigated for the first time. The study used light microscopy (LM) and scanning electron microscopy (SEM) to compare epidermal patterns of petals among different species. Quantitative and qualitative characteristics related to the petals, including cell density, flower color, cell type, and stomata and trichomes on both surfaces, were compared between the Rosa and Hulthemia subgenera species in Iran. No evidence of hairs and stomata was found on either surface of the epidermis. The arrangement of the adaxial surface in all species consists of conical cells called papillae with different degrees of projection and interconnected and a cuticle layer covers their surface. The abaxial surface pattern is often seen as flat cells with parallel lines or irregular folds. The cluster analysis using Past software showed that, although the petal epidermis is a consistent feature within the species, this trait is unsuitable for classifying Rosa species. In addition, in the present study it was found that, the difference in epidermal pattern in some species such as R. beggeriana and R. moschata was found to be useful to identify them from each other.

Keywords

Main Subjects


Article Title [Persian]

ریزریخت‌شناسی گلبرگ در برخی از گونه‌های نسترن وحشی در ایران

Authors [Persian]

  • ساره سیدی پور 1
  • کاظم مهدیقلی 2
1 دانشجوی دکتری گروه علوم گیاهی، دانشکده زیست‌شناسی، پردیس علوم، دانشگاه تهران، تهران، ایران
2 استادیار گروه علوم گیاهی، دانشکده زیست‌شناسی، پردیس علوم، دانشگاه تهران، تهران، ایران
Abstract [Persian]

 مطالعه حاضر، نخستین بررسی در مورد ویژگی‌های ریزریخت‌شناسی اپیدرم پشتی و رویی گلبرگ‌های 15 گونه نسترن وحشی (گل‌سرخیان) را در ایران ارایه می‌دهد. ساختارهای سطح اپیدرم با استفاده از میکروسکوپ نوری و الکترونی روبشی با هدف مقایسه الگوهای اپیدرمی گلبرگ‌ها بین گونه‌های جنس مذکور مورد مطالعه قرار گرفت. ویژگی‌های کمّی و کیفی مرتبط با گلبرگ‌ها از جمله تراکم سلولی، رنگ گل، نوع سلول و وجود روزنه‌ها و کرک‌ها در هر دو سطح پشتی و رویی، برای مقایسه و بررسی بین گونه‌های هر دو زیرجنس Rosa و Hulthemia در ایران در نظر گرفته شد. در نتیجه بررسی حاضر، هیچ شواهدی از کرک و روزنه روی هر دو سطح اپیدرم در گونه‌های مطالعه حاضر وجود نداشت، به طوری که آرایش سطح رویی گلبرگ در همه گونه‌ها از سلول‌های مخروطی (پاپیلا) با درجات متفاوت برجستگی و به هم پیوسته با یک لایه پوشش کوتیکولی تشکیل گردید. الگوی سطح پشتی بیشتر به صورت سلول‌های مسطح با خطوط موازی یا دارای چینه‌های نامنظم مشاهده گردید. همچنین، نتایج به دست آمده از آنالیز خوشه‌بندی با استفاده از نرم‌افزار Past در این بررسی نشان داد که اگرچه اپیدرم گلبرگ یک ویژگی ثابت در درون گونه بود، اما این صفت برای طبقه‌بندی گونه‌های جنس مورد مطالعه مناسب نبود. به علاوه در تحقیق حاضر، تفاوت در الگوی اپیدرم در برخی گونه‌ها مانند R. beggeriana و R. moschata برای شناسایی آن‌ها از یکدیگر مفید شناخته شد. 

Keywords [Persian]

  • اپیدرم گلبرگ
  • تنوع صفات
  • گل‌سرخیان
  • میکروسکوپ الکترونی (SEM)
  • میکروسکوپ نوری (LM)
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Volume 25, Issue 2 - Serial Number 71
December 2024
Pages 123-138
  • Receive Date: 24 July 2024
  • Revise Date: 27 August 2024
  • Accept Date: 18 September 2024
  • Publish Date: 28 December 2024