NOTES ON Arabis kaynakiae Daşkın (Brassicaceae), A CRITICALLY ENDANGERED SPECIES ENDEMIC TO TURKEY

Year 2020, Volume: 21 Issue: 2, 87 - 94, 15.10.2020

Cengiz Karaismailoğlu , Emrah Şirin

Abstract

This study reports on the evaluation of the taxonomical, macro- and micro morphological, anatomical, palynological and cytological features, together with the geographical distribution of Arabis kaynakiae Daşkın (Brassicaceae), a Critically Endangered (CR) species from Turkey. The description of the species was updated following detailed studies on new specimens found in Karaman/Ermenek. The surface microphotographs of seeds and pollen were obtained using Scanning Electron Microscopy. The seed surface ornamentation is papillate and its margins minutely tuberculate. Pollen grains appear tricolpate, isopolar, subprolate in shape, with polar axis of 19.62 ± 0.33 µm and equatorial axis of 12.94 ± 0.17 µm. The exine thickness ranges from 1.68 to 1.87 µm; however, the intine thickness ranges from 0.21 to 0.39 µm. Arabis kaynakiae has pollen of coarse reticulate type surface ornamentation with slightly undulated muri. Anatomical characters of root, stem and leaf of the species were also given. The cytological investigations revealed that A. kaynakiae is diploid with 2n = 2x = 16 chromosomes. The discovered population of A. kaynakiae increased the known distribution range of the species in Turkey, and an updated evaluation of the species considering the IUCN criteria was provided.

Keywords

Anatomy, Arabis kaynakiae, Chromosome, Distribution, IUCN, Taxonomy

Supporting Institution

Selçuk University

Project Number

18401090

Thanks

We would like to thank Prof. Dr. Birol MUTLU (a specialist on Arabis in Turkey) for identification of the specimen and Hasan Günal for his kind support and helpfulness during field studies. The specimens were collected during the field trips for a project supported by a grant from Scientific Investigation Project Coordinator of Selçuk University (Project No: 18401090).

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