LEAF ANATOMICAL STUDY OF GYPSOPHILA (CARYOPHYLLACEAE) AND ALLIED GENERA IN IRAN AND ITS TAXONOMICAL IMPLICATION

Document Type : Research Paper

Authors

1 1Center of Excellence in Phylogeny, and Department of Plant Science, School of Biology, College of Science, University of Tehran, P. O. Box: 14155-6455, Tehran, Iran

2 Centre of Excellence in Phylogeny, and Department of Plant Science, School of Biology, College of Science, University of Tehran, P. O. Box: 14155-6455, Tehran, Iran,

3 Research Institute of Forests and Rangelands, P. O. Box 13185-116, Tehran, Iran, Agricultural Research Education and Extension Organization (AREEO).

Abstract

Aanatomical features as revealed from cross-sections of leaf blades and midribs in 21 taxa of Gypsophila representing its currently recognized seven sections distributed in Iran as well as four species of Saponaria, two species of Allochrusa and one species of Ankyropetalum as its closely related genera are examined. In total nine quantitative and five qualitative characters were selected and measured. The most important characters include general shape of leaves (assessed only for narrow leaves) in transverse section, type of mesophyll (dorsi-ventral vs. isobilateral), thickness of sclerenchyma surrounding the vascular bundles, shape of central vascular bundle, number of parenchyma layers in midrib, thickness (number of layers) and structure of mesophyll, density and distribution of druses. In general, leaf anatomy does not provide any unique feature supporting the separation of genera Ankyropetalum and Allochrusa from Gypsophila. The number of spongy layers provides support at least for separation of Gypsophila (more than two layers) from most species of Saponaria (only one layer). Our results show that leaf anatomical features provide reliable evidence for subgeneric classification of Gypsophila and could be taxonomically valuable.

Keywords


Article Title [Persian]

مطالعه تشریحی برگ در سرده Gypsophila L. (تیره میخکیان) و خویشاوندانش در ایران وکاربرد آرایه‌ شناختی آن

Authors [Persian]

  • الهام امینی 1
  • شاهین زارع 2
  • مصطفی اسدی 3
1 گروه علوم گیاهی، دانشکده زیست‌شناسی، دانشگاه تهران، تهران،ایران
2 استاد دانشگاه تهران، قطب تبارزایی و گروه علوم گیاهی، دانشکده زیست‌شناسی، دانشگاه تهران، تهران، ایران
3 استاد مؤسسه تحقیقات جنگلها و مراتع کشور،سازمان تحقیقات، آموزش وترویج کشاورزی، تهران، ایران
Abstract [Persian]

خصوصیات تشریحی مربوط به پهنک و رگبرگ میانی ٢١ گونه از سرده Gypsophila به عنوان نماینده هفت بخشه پراکنده در ایران، چهار گونه از Saponaria، دو گونه از Allochrusa و یک گونه از Ankyropetalum از سرده­های خویشاوند آن، مورد بررسی قرار می­گیرد. درمجموع نه صفت تشریحی کمی و پنج صفت کیفی انتخاب و بررسی شد که مهم­ترین آنها عبارتند از: شکل کلی برش عرضی برگ­ها (فقط در برگ­های باریک) ، نوع مزوفیل )پشتی-شکمی یا متقارن دوطرفی(، ضخامت اسکلرانشیم پیرامون دسته آوندی مرکزی، شکل دستجات آوندی مرکزی، ضخامت (تعداد لایه­ها) و ساختار مزوفیل، شکل وتعداد ردیف پارانشیم اسفنجی و نردبانی، تعداد لایه­های پارانشیم رگبرگ میانی، تراکم و توزیع بلورهای کریستال پروجهی در کل آناتومی برگ شواهدی برای جدایی سرده های Allochrusa و Ankyropetalum از Gypsophila ارائه نکرد. تعداد لایه­های پارانشیم اسفنجی جدایی Gypsophila (با مزوفیل اسفنجی بیش از دو لایه) از اکثر گونه‌های Saponaria (با یک لایه مزوفیل اسفنجی) را تأیید می­کند. نتایج ما تأیید کرد که ویژگیهای تشریحی برگ شواهد قوی برای رده­بندی زیرسرده­های Gypsophila فراهم کرده و از لحاظ آرایه شناختی می­تواند مفید باشد.

Keywords [Persian]

  • Crystal
  • Gypsophila
  • Subgeneric classification
  • Systematics
  • Taxonomy
  • Tribe Caryophylleae
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