PALYNOLOGICAL SURVEY OF THE GENUS HYPERICUM (HYPERICACEAE) IN IRAN AND ITS TAXONOMIC IMPORTANCE

Document Type : Research Paper

Authors

1 Associate prof. at University of Guilan

2 Department of Biology, Faculty of Science, University of Guilan, Rasht, Iran.

3 Central Herbarium of Tehran University, School of Biology, University College of Science, Tehran, Iran.

4 Department of Biology, Faculty of Science, University of Zanjan, Zanjan, Iran.

Abstract

In this research, pollen grains of ten species and two subspecies of the genus Hypericum in Iran belonging to four sections were studied using light and scanning electron microscopy. The pollen grains are monad, isopolar to subisopolar and heteropolar, prolate, subprolate, spheroidal and prolate- spheroidal in shape, small to medium in size. The outline of pollen grains varies from round to triangular, quadrangular and ovate from polar view and elliptical, tetrahedral, quadrangular, round and ovate from equatorial view; 3 and 4 syncolporate to 3, 4 and 6 zonocolporate. Based on exine sculpturing, pore shape, size and muri thickness, the examined species are divided in two main types including scrobiculate and micro reticulate and 2 subtypes including small pore / thick muri and large pore / thin muri. The pores are arranged from irregular to regular-irregular with regular intervals. The current result revealed taxonomically important palynological data of the genus Hypericum. These traits can be used for infrageneric classification, especially at sectional and species levels.

Keywords

Article Title [Persian]

مطا لعه گرده‌شناسی سرده Hypericum در ایران و اهمیت تاکسونومیک آن

Authors [Persian]

  • مرضیه بیگم فقیر 1
  • مهسا رزاز 2
  • فریده عطار 3
  • زیور صالحی 2
  • مهناز وفادار 4
1 عضو هیئت علمی دانشگاه گیلان
2 دانشجوی دکتری زیست‌شناسی، گرایش سیستماتیک گیاهی دانشگاه گیلان
3 گروه زیست‌شناسی، دانشکده علوم، دانشگاه تهران
4 گروه زیست‌شناسی، دانشکده علوم، دانشگاه زنجان
Abstract [Persian]

در این مطالعه ده گونه و دو زیرگونه از سرده Hypericumدر ایران، متعلق به چهار بخشه توسط میکروسکپ نوری و الکترونی مورد بررسی قرار گرفت. دانه‌های گرده به صورن موناد، جور قطب تا تقریباً جور قطب و ناجور قطب، دارای اشکال استوانه‌ایی، تقریباً استوانه‌ایی، کروی و کروی- استوانه‌ای، اندازه کوچک تا متوسط می‌باشند. طرح کلی دانه‌های گرده از نمای قطبی گرد، سه گوش، چهار گوش، تخم مرغی و از نمای استوایی بیضوی، چهارگوش، مخروطی، گرد و تخم مرغی؛ منظم، منظم-نامنظم و نامنظم؛ دارای دریچه‌های 3 الی 4 شیاری-منفذی پیوسته و 3، 4 و 6 شیاری-منفذی ناپیوسته می‌باشند. گونه‌های مورد مطالعه، براساس تزیینات اگزین، شکل و اندازه منفذ، ضخامت دیواره‌ها به دو گروه اصلی (زگیل‌دار و ریز مشبک) و دو زیر گروه (منافذ کوچک/دیواره‌ها ضخیم و منافذ بزرگ/دیواره‌ها نازک) تقسیم می‌شوند. منافذ دارای فواصل منظم، منظم–نامنظم و نامنظم می‌باشند. نتایج تحقیق حاضر اهمیت تاکسونومیک صفات ریخت‌شناسی گرده را در سردهآشکار ساخت. این صفات می‌توانند برای رده ‌بندی تحت سرده‌ای، به ویژه در سطوح بخشه و گونه مورد استفاده قرار گیرند.

Keywords [Persian]

  • Hypericum
  • Hypericaceae
  • Taxonomy
  • Pollen morphology
  • Iran

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The Iranian Journal of Botany
Volume 24, Issue 1
July 2018
Pages 1-16

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History

  • Receive Date: 05 June 2017
  • Revise Date: 14 April 2018
  • Accept Date: 23 May 2018

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