Palynological study of the genus Gypsophila in Iran

Document Type : Research Paper

Authors

1 Research Assistant Prof., Department of Botany, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran (a.falatoury@gmail.com)

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

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

Abstract

Gypsophila with approximately 150 speciesrepresents the fourth largest genus of Caryophyllaceae and the second genus of tribe Caryophylleae. Iran is the second main center of Gypsophila diversity with 38 species in the world. Considering Gypsophila as one of the most polymorphic genus of the family andalmost half of its taxa distributed in Iran as endemic, thus makes it as a significant genus from taxonomic and nomenclatural points of view. Moreover, following the IUCN Red List criteria, about half of these endemic taxa are categorized as Critically Endangered (CR D.); hence, the protection of these taxa and their limited habitats is necessary. Pollen grains of 40 taxa (Table 1) were studied by electron microscopy for the first time in Iran (Figs 2–5). However, these attributions do not support sections which are made based on morphological characters and rather can be used to separate some close taxa. The pollen grains of Gypsophila are monade, apolar, pantoporate with 12 pores, rounded polyhedral, tectate with granulate microechinate-microperforate ornamentation. Pores are annulate, operculate. Pollen grains size (20.7–32 µm), operculum diameter (1.6–6 µm), distance between pores (2.3–7 µm) and operculum thickness are variable among taxa (Table 2). Gypsophila pilosa var. pilosa, and G. platyphylla have the largest while G. antoninae has the smallest pollen grains. The smallest pores and, therefore, the minimum diameter of the operculums can be seen in G. acantholimoides. The largest and thickest operculum is owned by G. virgata. A phenogram of Iranian Gypsophila taxa derived from palynological analysis using UPGMA method is also given herewith (Fig. 1).

Keywords

Article Title [Persian]

بررسی گرده‌شناسی جنس Gypsophila در ایران

Authors [Persian]

  • عطیه نژادفلاطوری 1
  • فرخ قهرمانی‌نژاد 2
  • مصطفی اسدی 3
1 استادیار پژوهش بخش تحقیقات رستنی‌ها، مؤسسه تحقیقات گیاه‌پزشکی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران (a.falatoury@gmail.com)
2 استاد گروه علوم گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران، ایران
3 استاد پژوهش بخش گیاه‌شناسی، مؤسسه تحقیقات جنگل‌ها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
Abstract [Persian]

جنس Gypsophila با حدود 150 گونه، چهارمین جنس بزرگ تیره میخکیان و دومین جنس طایفه کاریوفیله در جهان است. ایران با داشتن 38 گونه، دومین مرکز تنوع عمده پراکنش این جنس در جهان محسوب می‌شود. مطالعات گرده‌شناسی برای نخستین بار در ایران در  مورد 40 آرایه از این جنس انجام شد. اگرچه این صفات بخش‌بندی براساس صفات ریختی را حمایت نمی‌کنند، ولی از این خصوصیات می‌توان در تفکیک بعضی آرایه‌های نزدیک استفاده کرد. دانه‌های گرده آرایه‌های این جنس تکی، فاقد قطبین متمایز، پرمنفذ )12 منفذ( هستند و شکل چندوجهی با گوشه‌های گرد، آنولوس، دریچه و جبه با تزیینات microechinate-microporateدارند. اندازه دانه‌های گرده (7/20-32 میکرومتر)، قطر دریچه (6/1-6 میکرومتر)، فاصله بین منافذ (3/2-7 میکرومتر) و ضخامت دریچه در آرایه‌های مختلف متفاوت است. بزرگ‌ترین دانه‌های گرده متعلق به دو آرایهG. pilosa var. pilosa و G. platyphylla است. کوچک‌ترین دانه گرده مربوط به آرایه G. antoninae است. کوچک‌ترین منافذ و در نتیجه کمترین قطر دریچه در G. acantholimoides دیده می‌شود و بزرگ‌ترین و قطورترین دریچه متعلق به G. virgata می‌باشد.

Keywords [Persian]

  • آسیا
  • خاورمیانه
  • کاریوفیلوییده
  • گچ‌دوست
  • میخک‌سانان

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Rostaniha
Volume 18, Issue 1 - Serial Number 1
September 2017
Pages 16-32

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History

  • Receive Date: 07 May 2017
  • Revise Date: 19 September 2017
  • Accept Date: 09 July 2017

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