Elaheh Sadat Bagheri Shabestari

Shahid Beheshti University

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Hosein Riahi

Kashan University of Medical Sciences

Farideh Attar

University of Tehran

Masoud Sheidai

Shahid Beheshti University

Tayebeh Amini

Ferdowsi University of Mashhad

Masoud Sheidai

Shahid Beheshti University

Mostafa Assadi

Research Institute of Forests and Rangelands

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Shahid Beheshti University

Research Institute of Forests and Rangelands

Agricultural Research & Education Organization

University of Tehran

Kashan University of Medical Sciences

Ferdowsi University of Mashhad

Islamic Azad University, Aliabad Katoul

University of Sulaimani

Iran University of Science and Technology

Université de Toulouse

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Pollen morphology of Centaurea L. (Asteraceae) in Iran

Acta Botanica Brasilica (2013)

Elaheh Sadat Bagheri Shabestari Farideh Attar Hosein Riahi Masoud Sheidai

The genus Centaurea L. is one of the largest genera in the family Asteraceae. The number of taxa included in this genus ranges from 500 to 600 worldwide. Iran is one of the major centers of diversity for this genus. Pollen morphology has proved useful in the systematics of Asteraceae, as well as in that of some of its genera and species. The pollen morphology of 19 taxa of the genus Centaurea was investigated in detail by light and scanning electron microscopy. Examination under light microscopy showed pollen grains to be tricolporate, isopolar, radially symmetrical, oblate spheroidal, prolate spheroidal, subprolate, tectum perforate and scabrate. Based on the exine ornamentation observed under scanning electron microscopy, we identified two types of pollen grains, designated type I (dense acute spinules) and type II (sparse spinules). All of the taxa evaluated resemble Wagenitz's Jacea type. We present micrographs of pollen grains, together with descriptions of the characteristics of their structure. We found that the pollen characters (shape, exine structure, sculpturing) were useful for classification.

Centaurea

Morphology

10.1590/s0102-33062013000400004

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Seed morphology of the Centaurea species (Asteraceae) in Iran

Phytologia Balcanica (2013)

Elaheh Sadat Bagheri Shabestari Farideh Attar Hosein Riahi Masoud Sheidai

The macro- and micromorphological characters of seed and seed surface ornamentations were investigated in nine Centaurea species by using stereomicroscope and scanning electron microscopy. The seed shape was ovoid in C. gigantea, C. nemecii and C. behen, narrowly oblong in C. aucheri subsp. szowitsii, C. albonitens and C. amadanensis var. gymnoclada, and widely oblong in C. aucheri subsp. aucheri, C.aucheri subsp. elbursensis and C. regia subsp. regia. SEM showed that the achene surface had a striate sculpture and was strongly depressed on both dorsal and margin surfaces, without any hairs. However, in C. behen the achene had rectangular cells with long hairs on the surface. The seed length and width ranges differed significantly among the studied species. The obtained data were used in UPGMA clustering and PCoA plot to divide the studied species into distinct groups. Therefore, they were taxonomically important to the genus Centaurea.

Centaurea

Achene

UPGMA

Appendage

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Species relationships in Festuca (Poaceae) of Iran.

Elaheh Sadat Bagheri Shabestari Masoud Sheidai Mostafa Assadi Tayebeh Amini

The genus Festuca is one of the largest genera whitin the Poaceae family, comprising OF 450-500 species distributed in the temperate areas and 11 species growing in Iran. The present study considers phenetic and cladistic analyses of 46 populations belonging to 11 Festuca species, trying to reveal their inter-population morphological variations and inter-specific relationships. Clustering PCO (GIVE FULL NAME) ordination based on qualitative characters produced two major clusters, grouping the species with filiform leaves including F. valesiaca, F. sulcata, F. chalcophaea, F. elwendiana and F. akhanii together and the species with flat form-leaves including F. drymeia, F. gigantea, F. pratensis and F. arundinacea together. Parsimony analysis supported these results, which IS PARTLY IN AGREEMENT WITH taxonomic treatment of the genus in Flora Iranica. Factor analysis identified the most variable morphological characters which along with those identified by ANOVA test, may be used in the taxonomy of the genus.

Festuca

Festuca arundinacea

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