Science and earth science

Polish Polar Research

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Polish Polar Research | Accepted articles

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Abstract

Temperature rise together with resultant ice cover retreat in Svalbard, changes in hydrology and geomorphology of fjords and coastal waters is presented as forming force for the marine habitats. Satellite data show increase of habitat complexity following the tidal glaciers retreat and emergence of new (315 km) and complex shoreline. Most evident changes occur in the inner-fjord settings of the west coast of archipelago, while habitats of exposed marine shores and eastern sector of Svalbard remains little changed. It is hypothesized, that decrease in ice cover opens more space for life compared to the cold period.
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Authors and Affiliations

Jan Marcin Węsławski
1
ORCID: ORCID
Jacek A. Urbański
1
ORCID: ORCID

  1. Institute of Oceanology Polish Academy of Sciences, Powstańców Warszawy 55,Sopot 81-712, Poland
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Abstract

Heat shock proteins 70 (Hsp70) are potential thermal stress markers as they play a pivotal role in safeguarding cells against heat shock-induced damage. The Hsp70s are present in several variants with each containing its peculiar importance due to their specific functions such as cell protection during elevated thermal stress. The present investigation evaluated the gene expression profiles of all Hsp70 genes in Glaciozyma antarctica PI12 during a heat wave condition. In this study, we exposed G. antarctica PI12 cells to a realistic heat wave to understand the impacts of the extraordinary, unprecedented heat waves that hit Antarctica at nearly 40°C above the average in 2022. The experiment was carried out through eight days where cells were exposed gradually at 0, 2, 4, 8, 12, 16, 20, 25 and 30°C. The gene expression profiles were obtained during the simulated heat wave along with non-stressed control treatments by real-time PCR. Out of the six Hsp70 genes in G. antarctica PI12, five were expressed under the conditions tested. Among the expressed genes, gahsp70-1, gahsp70-5, and gahsp70-6 showed significant upregulation. Specifically, their expression levels increased by five- to eightfold after exposure to heat shock at 4°C. Gene expression patterns at 20°C and 30°C also showed induction with the highest at 3.6 folds and 5.8 folds, respectively. These results indicate that the expression of Hsp70 genes in G. antarctica PI12 was inducible under thermal stress, indicating their importance in cells during the heat waves. These results conclude that the gene expression patterns of Hsp70 during heat waves contribute vital information on thermal adaptation in the Antarctic marine ecosystem under climate stress.
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Authors and Affiliations

Nur Athirah Yusof
1
Jennifer Charles Labo
1
Wan Nur Shuhaida Wan Mahadi
1
Makdi Masnoddin
2
Hyun Park
3
Clemente Michael Vui Ling Wong
1
ORCID: ORCID

  1. Biotechnology Research Institute, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah, Malaysia
  2. Preparatory Centre for Science and Technology, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah, Malaysia
  3. Division of Biotechnology, Korea University, Seoul 02841, Korea

Instructions for authors


The quarterly Polish Polar Research invites original scientific papers dealing with all aspects of polar research. The journal aims to provide a forum for publication of high-quality research papers, which are of international interest.

We warmly welcome review papers and proposals for thematic Special Issues.

Articles must be written in English. Authors are requested to have their manuscript read by a person fluent in English before submission. They should not be longer than 30 typescript pages, including tables, figures and references. However, upon request, longer manuscripts may be considered for publication. All papers are peer-reviewed. With a submitted manuscript, authors should provide e-mail addresses of at least three suggested reviewers.


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