Petiole anatomical features in Salix and some of its relatives in the family Salicaceae

Document Type : Research Paper

Authors

1 MSc Graduate, Plant Systematics, Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran 15719-14911, Iran

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

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

Abstract

The classification of the genus Salix is troubled by the intra-specific flexibility and diversity of the morphological features. The aim was to prepare a comparative description of petiole anatomy of 23 species of Salix, in addition to two species of Populus and Bivinia jalbertii, as well as to determine the taxonomic importance of petiole features. In order to do so, 10 quantitative and 10 qualitative petiole anatomical features were studied. Moreover, a Bayesian analysis was executed on the relevant ITS sequences obtained from GenBank, included 28 specimens from 17 species. The anatomical features were then mapped on the resulted cladogram and the ancestral states of some prominent petiole anatomical features were reconstructed. Based on the results, no stomata were observed in the petiole's epidermis of any of the species studied; therefore, it could be assumed that, the petiole in the studied species is dependent to the leaf blade for respiration and gas exchange. While the quantitative petiole anatomical features were turn to be variable in the individuals of the same species grown in different habitats, qualitative features showed a desirable consistency. The petiole anatomical features studied were proved to be useful in the differentiation and identification of taxa at sub-generic and specific levels. In addition, the reconstruction of the ancestral state of the studied features revealed that, polygonal cell shape, straight or slightly curved anticlinal wall pattern, horizontal compression of the petiole, the presence of lateral ribs, convex adaxial surface and ribbed petiole outline were primitive features in the species studied.
 

Keywords

Article Title [Persian]

صفات تشریحی دمبرگ در بید و برخی از خویشاوندانش در تیره بیدیان

Authors [Persian]

  • شکوفه حمزه لو 1
  • فرخ قهرمانی نژاد 2
  • احسان حسینی 3
1 دانش‌آموخته کارشناسی ارشد سیستماتیک گیاهی، گروه علوم گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران 14911-15719، ایران
2 استاد گروه علوم گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران 14911-15719، ایران
3 استادیار گروه علوم گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران 14911-15719، ایران
Abstract [Persian]

رده‌بندی جنس L.  Salix (تیره بیدیان) به دلیل انعطاف‌پذیری و تنوع درون گونه‌ای در صفات ریخت‌شناختی مشکل‌آفرین است. هدف از این پژوهش، توصیف و مقایسه تشریح دمبرگ 23 گونه از جنس Salix، دو گونه از جنس Populus L.  و گونه Tul.  Bivinia jalbertii و همچنین تعیین اهمیت سیستماتیکی صفات تشریحی دمبرگ است. به این منظور، 10 صفت کمّی و 10 صفت کیفی مرتبط با تشریح دمبرگ بررسی و ارزیابی شدند. علاوه بر این، تحلیل بیزین روی توالی ITS موجود از 28 نمونه از 17 گونه مرتبط موجود در GenBank انجام شد، صفات تشریحی روی کلادوگرام به دست آمده مکان‌یابی شدند و حالت اجدادی برخی صفات تشریحی بازسازی شد. براساس نتایج به دست آمده، هیچ یک از 26 گونه بررسی شده دارای روزنه در دمبرگ نبود و بنابراین، می‌توان نتیجه گرفت که دمبرگ برای تنفس و تبادل گاز متکی به پهنک است. با وجود آن که صفات کمّی بین افراد مختلف یک گونه که در زیستگاه‌های مختلف رویش کرده بودند متغیر بود، صفات کیفی ثبات خوبی از خود نشان دادند. صفات تشریحی دمبرگ در گونه‌های بررسی شده با موفقیت جهت تمایز بین آرایه‌های زیرجنسی و گونه‌ها به کار برده شدند. به علاوه، بازسازی حالت اجدادی صفات بررسی شده نشان داد که شکل سلولی چندضلعی، الگوی صاف تا اندکی خمیده در دیواره‌های آنتی‌کلینال سلول‌های اپیدرم، فشردگی افقی دمبرگ، حضور پره‌های جانبی در دمبرگ، سطح فوقانی محدب و حاشیه شیاردار دمبرگ، صفات ابتدایی در گونه‌های بررسی شده بودند.

Keywords [Persian]

  • تبارزایشی
  • شاتون‌داران
  • صنوبر
  • مالپیگیال
  • Bivinia

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Rostaniha
Volume 21, Issue 2 - Serial Number 60
December 2020
Pages 185-205

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History

  • Receive Date: 13 June 2020
  • Revise Date: 11 October 2020
  • Accept Date: 21 October 2020

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