Taxonomic study of Tanacetum polycephalum in Hamedan province with emphasis on floristic marker and using special station method

Subject Areas : Journal of Plant Ecophysiology

مریم  Ahmadi ¹ (دانش آموخته کارشناسی ارشد دانشگاه بوعلی سینا همدان)
طاهره  Ghasemkhani ² (دانش آموخته کارشناسی ارشد دانشگاه بوعلی سینا همدان)
M.  Atri ³ (استاد دانشگاه بو علی سینا همدان)
A.  Chehregani ⁴ (استاد دانشگاه بو علی سینا همدان)

Received: 2014-09-24 Accepted : 2014-09-24 Published : 2014-09-01

Keywords: Tanacetum polycephalum, determination of special station method, phenoecodeme,

Abstract :

Tanacetum L. is one of the largest genus of Asteraceae family and constitutes one of the most problematic genera in terms of taxonomic complexity, especially concerning genus delimitation against closely related entities. The Tanacetum species are rich in essential oils, bitter components and sesquiterpene lactones. Tanacetum polycephalum Shultz Bip. is a widespread and polymorphic species in Iran. To determine intraspecific variations in T. polycephalum from taxonomic point of view and effective ecological factors, data were collected using special station method. In this way, ten special stations were recognized for T. polycephalum in Hamedan province. Floristic data (floristic marker) were analyzed with Anaphyto software by FCA method. Morphometric data analysis of individual collected from each special station, by using 60 vegetative and reproductive characters, was made with PCO and UPGMA methods and ecologic data were analyzed with CCA method. Analysis of floristic data led to the identification of 4 separate groups that were indicative of the existence of intra-specific diversity. Analysis of morphometric data confirmed the 4-mentioned floristic groups. Analysis of ecologic data showed that ecological factors are effective in grouping and forming special stations diversity, accordingly, 3 phenoecodeme are identifiable and can be introduced.