Leaf trichome diversity in Ehretiaceae

Document Type : Research Paper

Authors

1 PhD Graduate, Department of Biology, Bu-Ali Sina University, Hamedan, 65178-38695, Iran

2 Prof., Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran 15719-14911, Iran

10.22092/bot.j.iran.2025.368150.1410

Abstract

Leaf trichomes are important components of plants in systematics, morphology, defense mechanisms, and ecological interactions. In this study, scanning electron microscopy (SEM) was used to examine leaf trichomes of 15 species of Ehretiaceae (Boraginales), including representative species of the genera Bourreria, Ehretia, Halgania, Lepidocordia, Rochefortia, and Tiquilia. The results showed a variety of trichome types, both glandular and non-glandular, among the studied species. Some species also had glabrous leaves. The results showed differences in morphology, density, and distribution of trichomes within and between genera. The distribution of trichomes on the leaf surface of some species is dense and in others very sparse. Leaf trichomes also varied in size, and in some species, both short and long hairs were observed. Some trichomes have appendages on their surface and their shape is varied. The results of this study highlight the diversity of trichomes and their potential use as a taxonomic tool to determine the precise position of the arrays of this family.

Keywords

Main Subjects

Article Title [Persian]

تنوع کرک در برگ کهیروئیان

Authors [Persian]

  • حمید نظری 1
  • فرخ قهرمانی‌نژاد 2
1 دانش‌آموخته دکتری، گروه زیست‌شناسی، دانشگاه بوعلی سینا، همدان، 38695-65178، ایران
2 استاد گروه علوم گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران 15719-14911، ایران
Abstract [Persian]

کرک‌های برگ از اجزای مهم گیاهان در سیستماتیک، ریخت‌شناسی، مکانیسم‌های دفاعی و تعاملات بوم‌شناختی هستند. در این بررسی، از میکروسکوپ الکترونی روبشی (SEM) برای مطالعه کرک‌های برگ 15 گونه از کهیروئیان (گاوزبان‌سانان) از جمله گونه‌های نماینده جنس‌های Bourreria، Ehretia، Halgania، Lepidocordia، Rochefortia و Tiquilia استفاده شد. نتایج، انواع مختلفی از کرک‌ها، اعم از غده‌ای و غیرغده‌ای را در بین گونه‌های مورد مطالعه نشان داد، در حالی که برخی گونه‌ها دارای برگ‌های بدون کرک بودند. نتایج تفاوت‌هایی را در ریخت‌شناسی، تراکم و توزیع کرک در داخل و بین جنس‌ها آشکار ساخت. پراکنش کرک‌ها در سطح برگ برخی از گونه‌ها متراکم و در برخی دیگر بسیار کم بود. کرک‌های برگ نیز از نظر اندازه متفاوت بودند، به طوری که در برخی گونه‌ها دو نوع کرک کوتاه و بلند مشاهده شد. برخی از کرک‌ها روی سطح خود تزییناتی داشتند و تنوع در شکل آن‌ها دیده شد. نتایج این بررسی تنوع کرک‌ها و کاربرد بالقوه آن‌ها به عنوان ابزار رده‌بندی به منظور تعیین جایگاه دقیق آرایه‌های این تیره را برجسته می‌کند.

Keywords [Persian]

  • بوم‌شناسی
  • پراکنش
  • دوبازویی
  • سازگاری
  • کرک غده‌ای
  • Ehretiaceae

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Rostaniha
Volume 26, Issue 2 - Serial Number 73
December 2025
Pages 112-123

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History

  • Receive Date: 30 March 2025
  • Revise Date: 05 May 2025
  • Accept Date: 29 May 2025
  • Publish Date: 22 December 2025

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