Pollen micromorphological study of some Chenopodiaceae species and their taxonomical relationships in Iran

Document Type : Research Paper

Authors

1 PhD Student, Department of Biology, Islamic Azad University, Science and Research Branch, Tehran, Iran

2 Associate Prof., Department of Biology, Islamic Azad University, Central Tehran Branch, Tehran, Iran

3 Research Associate Prof., Research Institute of Forests and Rangelands, Agricultural Research Education, and Extension Organization (AREEO), Tehran, Iran

4 Research Prof., Research Institute of Forests and Rangelands, Agricultural Research Education, and Extension Organization (AREEO), Tehran, Iran

5 Prof., Department of Biology, Islamic Azad University, Science and Research Branch, Tehran, Iran

Abstract

Pollen grains micromorphological characteristics in nine genera of Chenopodiaceae (Atriplex, Bassia, Bienertia, Chenopodium, Dysphania, Haloxylon, Kochia, Salsola, and Suaeda) that tolerate more difficult ecological conditions in Iran were examined by Light Microscopy (LM) and Scanning Electron Microscopy (SEM). The obtained results showed that, the pollen grains quantitative and qualitative micromorphological characters were different in the studied species. A dendrogram obtained from the pollen grain characters in our research placed these taxa on two groups and three pollen types. Although, pollen group 1 had not taxonomical values. Pollen group 2 partly was in agreement with taxonomical level based on recently taxonomical and phylogenetic works including type A (Atriplex), type C (Chenopodium), and type D (Dysphania). Pore number had a major role to construct group 2. The number of echinate on pore membrane and on 10 μm2 area of exine had major roles in constructing of group 1. The other pollen grains characters were important for the delimitation of both groups.
 
 

Keywords


Article Title [فارسی]

ریزریخت‌شناسی دانه گرده در برخی گونه‌‏های تیره اسفناجیان و روابط آرایه‌شناختی آن‌ها

Authors [فارسی]

  • افسانه جلیل زاده 1
  • سید محمد مهدی حمدی 2
  • یونس عصری 3
  • مصطفی اسدی 4
  • علیرضا ایرانبخش 5
1 دانشجوی دکتری گروه زیست‏شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
2 دانشیار گروه زیست‏شناسی، دانشکده علوم، دانشگاه آزاد اسلامی، واحد تهران مرکز، تهران، ایران
3 دانشیار پژوهش مؤسسه تحقیقات جنگل‌ها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
4 استاد پژوهش مؤسسه تحقیقات جنگل‌ها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
5 استاد گروه زیست‏شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
Abstract [فارسی]

ویژگی‌های ریزریخت‌شناسی دانه گرده نُه جنس از تیره اسفناجیان (Atriplex، Bassia،Bienertia ،Chenopodium ، Dysphania، Haloxylon، Kochia، Salsola و Suaeda) که قادر به تحمل شرایط بسیار حاد بوم‌شناختی در ایران هستند، به وسیله میکروسکوپ نوری (LM) و میکروسکوپ الکترونی نگاره (SEM) مورد بررسی قرار گرفت. نتایج این تحقیق نشان داد که صفات کمّی و کیفی ریزریخت‌شناسی دانه گرده در جنس‌های مورد بررسی متفاوت بودند. دندروگرام به دست آمده از این بررسی، جنس‌های مورد بررسی را در دو گروه و سه تیپ قرار داد. اگر چه گروه اول از لحاظ آرایه‌شناسی و فیلوژنی مفید واقع نشد، اما گروه دوم تا حدودی مطابق با سطوح آرایه شناسی و فیلوژنی براساس بررسی‌های اخیر مربوط به جنس‌های مورد مطالعه بود که شامل تیپ‌هایA  (Atriplex)، C (Chenopodium) و (Dysphania) D می‌شد. تعداد حفره‌ها، نقش مهمی در ایجاد گروه دوم داشت. تعداد echinus ها در حفره‌ها و در سطح 10 میکرومتر مربع اگزین نقش مهمی در ایجاد گروه اول داشتند و بقیه صفات دانه گرده در تعیین هر دو گروه دارای اهمیت بودند.
 
 

Keywords [فارسی]

  • اگزین
  • تاکسونومی
  • تیپ گرده
  • دانه گرده
  • روابط فیلوژنتیکی
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Volume 22, Issue 2 - Serial Number 62
December 2021
Pages 209-222
  • Receive Date: 05 August 2021
  • Revise Date: 09 September 2021
  • Accept Date: 07 November 2021
  • First Publish Date: 07 November 2021