TY - JOUR ID - 101509 TI - APPLICATION OF ACHENE MORPHOLOGY IN SYSTEMATICS OF SOME IRANIAN TARAXACUM (ASTERACEAE TRIBE CICHORIEAE) SPECIES JO - The Iranian Journal of Botany JA - IJB LA - en SN - 1029-788X AU - Savadkoohi, Faezeh AU - Nejadsattar, Taher AU - Assadi, Mostafa AU - Jafari, Efat AU - Mehregan, Iraj AD - PhD Student / Department of Biology, Science and Research Branch, Islamic Aza dUniversity, Tehran, Iran AD - Associate Professor / Department of Biology, Science and Research Branch, Islamic Aza dUniversity, Tehran, Iran AD - Professor / Research Institute of Forests and Rangelands, P.O. Box 13185-116, Tehran, Iran AD - Membership of scientific board / Research Center of Agricultural and Natural Resources of Fars province, P.O. Box 71555-617, Iran AD - Assistant Professor / Department of Biology, Science and Research Branch, Islamic Aza dUniversity, Tehran, Iran Y1 - 2012 PY - 2012 VL - 18 IS - 2 SP - 249 EP - 161 KW - Achene micromorphology KW - Asteraceae KW - Iran KW - nrDNA ITS KW - Taraxacum phylogeny DO - 10.22092/ijb.2012.101509 N2 - Achene micro-morphology of 17 species of Taraxacum (Asteraceae) is investigated using Scanning Electron Microscopy (SEM). In this study 12 qualitative and quantitative characters such as achene length, width and colour, ornamentation type and size, length of beak, length and colour of pappus were examined. Cluster Analysis (CA) and Principal Component Analysis (PCA) of data showed that micromorphology of achene has significant role in separating species from each other and it does support the delimitation at sectional level. Our results showed that ornamentation on achene body cannot be used in separation of taxa at species level as well as sectional rank, whereas ornamentation size showed to be a better tool for separation of species. Since fruit micromorphology provides some evidences for delimitation of species and sections, the results then were compared with the phylogenetic trees obtained from Maximum Parsimony (MP) and the Bayesian analysis (BA) of the nrDNA ITS region. Our results showed that current taxonomic system of the genus Taraxacum is not compatible with its phylogeny. UR - https://ijb.areeo.ac.ir/article_101509.html L1 - https://ijb.areeo.ac.ir/article_101509_828e4dc6f1379ecf09eee03ba00928b9.pdf ER -