Molecular signatures of environmental adaptation mechanisms of Rhizocarpon geographicum in Horseshoe Island (west of the Antarctic Peninsula) and Türkiye

IF 1.5 4区地球科学 Q3 ECOLOGY

Polar Science Pub Date : 2025-03-01 DOI:10.1016/j.polar.2024.101134

Ekrem Bölükbaşı , Mehmet Gökhan Halıcı

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Abstract

The adaptation of lichen species to different habitats and extreme conditions is due to rapid changes in expressions of the genes in their genetic backgrounds. In this study, lichen samples were collected from two different regions: from Horseshoe Island, located to the west of the Antarctic Peninsula and from the west coast of Türkiye. The nrITS gene regions of the samples were studied and the phylogenetic positions of the samples were confirmed as Rhizocarpon geographicum (L.) DC. After DNA barcoding of R. geographicum, expression differences of three below-specified stress genes were revealed. Comparative determinations of the changes in the expressions of the multiprotein binding factor-1 (MBF-1), polyketide synthase (PKS), and photosystem II D1 protein (psbA) genes due to temperature or other environmental stress change stress were performed by a real-time PCR. Specifically, under cold stress conditions such as those found on Horseshoe Island, the MBF-1 gene was highly expressed, while PKS and psbA gene expression levels were lower compared to the west coast of Türkiye. The results of this study, which is the first in its field, highlight the adaptation of Rhizocarpon geographicum specimens to those habitats and regional climate. Specimen collected from different geographical regions exhibited gene expression differences.

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来源期刊

Polar Science ECOLOGY-GEOSCIENCES, MULTIDISCIPLINARY

CiteScore

3.90

自引率

5.60%

发文量

期刊介绍： Polar Science is an international, peer-reviewed quarterly journal. It is dedicated to publishing original research articles for sciences relating to the polar regions of the Earth and other planets. Polar Science aims to cover 15 disciplines which are listed below; they cover most aspects of physical sciences, geosciences and life sciences, together with engineering and social sciences. Articles should attract the interest of broad polar science communities, and not be limited to the interests of those who work under specific research subjects. Polar Science also has an Open Archive whereby published articles are made freely available from ScienceDirect after an embargo period of 24 months from the date of publication. - Space and upper atmosphere physics - Atmospheric science/climatology - Glaciology - Oceanography/sea ice studies - Geology/petrology - Solid earth geophysics/seismology - Marine Earth science - Geomorphology/Cenozoic-Quaternary geology - Meteoritics - Terrestrial biology - Marine biology - Animal ecology - Environment - Polar Engineering - Humanities and social sciences.