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Issue: Vol. 646 No. 2: 2 May 2024
Type: Article
Published: 2024-05-02
DOI: 10.11646/phytotaxa.646.2.3
Page range: 125-142
Abstract views: 51
PDF downloaded: 4

Molecular phylogenetic studies on Asparagus (Asparagaceae) revealed the position of the highly endangered Irano-Turkish halophytic species A. lycaonicus P.H.Davis related to A. officinalis L.

Halophytes and C4 Plants Research Laboratory, Department of Plant Sciences, School of Biology, College of Sciences, University of Tehran, P.O. Box 14155-6455, Tehran, Iran
Halophytes and C4 Plants Research Laboratory, Department of Plant Sciences, School of Biology, College of Sciences, University of Tehran, P.O. Box 14155-6455, Tehran, Iran
Environmental Health Program, Şabanözü Vocational School, Çankırı Karatekin University, P.O. Box 18650, Çankırı, Türkiye
Halophytes and C4 Plants Research Laboratory, Department of Plant Sciences, School of Biology, College of Sciences, University of Tehran, P.O. Box 14155-6455, Tehran, Iran, Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Königin-Luise-Straße 6-8, 14195 Berlin, Germany
Monocots Bolluk Salt Lake cultivated Asparagus Flora of Iran Flora of Turkey Meyghan Salt Lake

Abstract

Asparagus lycaonicus P.H.Davis (Asparagaceae), a highly interesting halophytic species was found in two disjunct populations of ca. 1550 km aerial distance, one in Central Anatolia (Bolluk Salt Lake) and the other in Central Iran (Meyghan Salt Lake). Using one nuclear phytochrome C (PHYC) and two plastid regions (trnH-psbA and trnD-T) the phylogenetic position of this Irano-Turkish endemic species was studied. In contrast to low resolution of plastid sequences, the PHYC provides good resolution for understanding species level phylogeny in SW Asian Asparagus. Molecular data confirms a conspecific position of the two disjunct localities in Turkey and Iran and their position in a clade containing cultivated Asparagus and many other Irano-Turkish species. Asparagus lycaonicus is extremely rare in Iran and since its discovery in 1986, it has never been rediscovered in Iran, even in its initial collection site. Intensive land use activities, water level changes and the passage of Arak wastewater into the Meyghan Salt Lake area has drastically changed the habitat of A. lycaonicus and might have caused its extinction. Since its discovery in 1960 in Turkey, the species is only found in a small area around and inside a sodic extraction factory around Bolluk Lake. Considering the critical condition of its populations in Iran and Turkey, we evaluate the conservation status of Asparagus lycaonicus as Critically Endangered (CR). In conclusion we urge the authorities to implement in situ measures for conservation and restoration of the habitats of A. lycaonicus, a halophytic species related to cultivated Asparagus. The taxonomic status of some newly described Asparagus from Iran is discussed with reducing A. touranensis Hamdi & Assadi to synonym of A. griffithii Baker., A. khorasanensis Hamdi & Assadi to synonym of A. breslerianus Schult. & Schult.f, and Asparagus bojnurdensis Hamdi & Assadi to synonym of A. verticillatus L.

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