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Showing 3 results for Morphological Characters

Yasamin Nasseh, Mohammad Reza Joharchi,
Volume 5, Issue 3 (12-2018)
Abstract

During the study on the specimens of Astragalus sect. Ammodendron in the herbarium of Ferdowsi University of Mashhad (FUMH), based on the last and most recent sources, two new species, i.e. A. microfoliolatus sp. nova and A. rashed-mohasseli sp. nova were found and described. Morphological evidence confirmed that the belonging of these taxa to Astragalus sect. Ammodendron. The most important differences between A. microfoliolatus and its closest relatives are leaflets with very small size and glabrescent legume. Also, the main distinctive characters ofA. rashed-mohasseli are the presence of hairs on the dorsal side of vexillum, oblong legume and short rachis. Hairy vexillum has been obseverd for the first time in this section. In addition, A. aiwadzhi is recorded as a new species for the flora of Iran. Taxonomic descriptions, illustrations and distribution maps are provided to expedite identification.
 
 
Mehrshid Riahi, Sima Dastbarjan, Negin Jahani Seghaleh,
Volume 6, Issue 4 (1-2020)
Abstract

The phylogenetic relationships among 39 species belonging to 12 sections of Astragalus from Iran were studied on the basis of 29 morphological characters. The cladistics analysis of the morphological data was performed using PAUP* 4.0b10 program. The obtained data were compared with the molecular systematics data obtained from nuclear DNA ITS. In contrast with previous molecular systematic studies, the morphological data placed the sect. Caraganella as paraphyletic clade to the sects. Cenantrum, Nuculiella, and Eremophysa. Our results were similar to those obtained by previous molecular systematic studies which specified sects. Astragalus, Alopecuroidei and Laxiflori as paraphyletic clades. In accordance with data presented in previous molecular systematic studies, the species of the sect. Caprini showed close relationship with those in sects. Pelta and Pendulina. The present analysis, consistent with molecular systematic studies, rejected the monophyly of most sections studied. Therefore, although the circumscription of those sections needs to be carried out on the basis of the results of widely accepted molecular and morphological phylogenetic studies, future studies are needed to clarify and resolve some remaining ambiguities.
 
 
Simin Kalouti, Shahrokh Kazempour-Osaloo, Farideh Attar, Alfonso Susanna, Núria Garcia-Jacas,
Volume 8, Issue 1 (6-2021)
Abstract

In this study, the phylogeny and morphological variation of 6 species of the genus Cousinia sect. Stenocephalae, i.e., C. hypopolia, C. decipiens, C. esfandiarii, C. renominata, C. stahliana and C. daryoushiana, distributed in NE regions of Iran, were investigated. ITS, ETS and rpl32-trnL (UAG) sequences for 12 species (17 specimens) were generated. Phylogenetic interspecies relationships were constructed by Bayesian method and likelihood analysis. The specimens were also investigated in terms of morphological characters. Despite very similar morphological characters and geographical distributions, the separation of these species was confirmed by the obtained results of the molecular data (combined data of plastid and nuclear sequences). On the basis of the present study, the above-mentioned species were almost separated from each other by morphological characters and molecular data. A diagnostic key and the description of these species were also presented. These results did not conform with the previous palynological and anatomical studies of the species.
 

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