Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics
Snow algae play crucial roles in cold ecosystems, however, many aspects related to their biology, adaptations and especially their diversity are not well known. To improve the identification of snow algae from colored snow, in the present study we used a polyphasic approach to describe a new Antarct...
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Online Access: | http://dx.doi.org/10.3389/fpls.2021.662298 https://www.frontiersin.org/articles/10.3389/fpls.2021.662298/full |
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crfrontiers:10.3389/fpls.2021.662298 2024-02-11T09:58:01+01:00 Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics Gálvez, Francisca E. Saldarriaga-Córdoba, Mónica Huovinen, Pirjo Silva, Andrea X. Gómez, Iván 2021 http://dx.doi.org/10.3389/fpls.2021.662298 https://www.frontiersin.org/articles/10.3389/fpls.2021.662298/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Plant Science volume 12 ISSN 1664-462X Plant Science journal-article 2021 crfrontiers https://doi.org/10.3389/fpls.2021.662298 2024-01-26T10:08:37Z Snow algae play crucial roles in cold ecosystems, however, many aspects related to their biology, adaptations and especially their diversity are not well known. To improve the identification of snow algae from colored snow, in the present study we used a polyphasic approach to describe a new Antarctic genus, Chlorominima with the species type Chlorominima collina . This new taxon was isolated of colored snow collected from the Collins Glacier (King George Island) in the Maritime Antarctic region. Microscopy revealed biflagellated ellipsoidal cells with a rounded posterior end, a C-shaped parietal chloroplast without a pyrenoid, eyespot, and discrete papillae. Several of these characteristics are typical of the genus Chloromonas , but the new isolate differs from the described species of this genus by the unusual small size of the cells, the presence of several vacuoles, the position of the nucleus and the shape of the chloroplast. Molecular analyzes confirm that the isolated alga does not belong to Chloromonas and therefore forms an independent lineage, which is closely related to other unidentified Antarctic and Arctic strains, forming a polar subclade in the Stephanosphaerinia phylogroup within the Chlamydomonadales. Secondary structure comparisons of the ITS2 rDNA marker support the idea that new strain is a distinct taxon within of Caudivolvoxa . Physiological experiments revealed psychrophilic characteristics, which are typical of true snow algae. This status was confirmed by the partial transcriptome obtained at 2°C, in which various cold-responsive and cryoprotective genes were identified. This study explores the systematics, cold acclimatization strategies and their implications for the Antarctic snow flora. Article in Journal/Newspaper Antarc* Antarctic Arctic Collins Glacier King George Island Frontiers (Publisher) Antarctic Arctic Collins Glacier ENVELOPE(65.308,65.308,-73.829,-73.829) King George Island The Antarctic Frontiers in Plant Science 12 |
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topic |
Plant Science |
spellingShingle |
Plant Science Gálvez, Francisca E. Saldarriaga-Córdoba, Mónica Huovinen, Pirjo Silva, Andrea X. Gómez, Iván Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics |
topic_facet |
Plant Science |
description |
Snow algae play crucial roles in cold ecosystems, however, many aspects related to their biology, adaptations and especially their diversity are not well known. To improve the identification of snow algae from colored snow, in the present study we used a polyphasic approach to describe a new Antarctic genus, Chlorominima with the species type Chlorominima collina . This new taxon was isolated of colored snow collected from the Collins Glacier (King George Island) in the Maritime Antarctic region. Microscopy revealed biflagellated ellipsoidal cells with a rounded posterior end, a C-shaped parietal chloroplast without a pyrenoid, eyespot, and discrete papillae. Several of these characteristics are typical of the genus Chloromonas , but the new isolate differs from the described species of this genus by the unusual small size of the cells, the presence of several vacuoles, the position of the nucleus and the shape of the chloroplast. Molecular analyzes confirm that the isolated alga does not belong to Chloromonas and therefore forms an independent lineage, which is closely related to other unidentified Antarctic and Arctic strains, forming a polar subclade in the Stephanosphaerinia phylogroup within the Chlamydomonadales. Secondary structure comparisons of the ITS2 rDNA marker support the idea that new strain is a distinct taxon within of Caudivolvoxa . Physiological experiments revealed psychrophilic characteristics, which are typical of true snow algae. This status was confirmed by the partial transcriptome obtained at 2°C, in which various cold-responsive and cryoprotective genes were identified. This study explores the systematics, cold acclimatization strategies and their implications for the Antarctic snow flora. |
format |
Article in Journal/Newspaper |
author |
Gálvez, Francisca E. Saldarriaga-Córdoba, Mónica Huovinen, Pirjo Silva, Andrea X. Gómez, Iván |
author_facet |
Gálvez, Francisca E. Saldarriaga-Córdoba, Mónica Huovinen, Pirjo Silva, Andrea X. Gómez, Iván |
author_sort |
Gálvez, Francisca E. |
title |
Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics |
title_short |
Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics |
title_full |
Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics |
title_fullStr |
Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics |
title_full_unstemmed |
Revealing the Characteristics of the Antarctic Snow Alga Chlorominima collina gen. et sp. nov. Through Taxonomy, Physiology, and Transcriptomics |
title_sort |
revealing the characteristics of the antarctic snow alga chlorominima collina gen. et sp. nov. through taxonomy, physiology, and transcriptomics |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/fpls.2021.662298 https://www.frontiersin.org/articles/10.3389/fpls.2021.662298/full |
long_lat |
ENVELOPE(65.308,65.308,-73.829,-73.829) |
geographic |
Antarctic Arctic Collins Glacier King George Island The Antarctic |
geographic_facet |
Antarctic Arctic Collins Glacier King George Island The Antarctic |
genre |
Antarc* Antarctic Arctic Collins Glacier King George Island |
genre_facet |
Antarc* Antarctic Arctic Collins Glacier King George Island |
op_source |
Frontiers in Plant Science volume 12 ISSN 1664-462X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fpls.2021.662298 |
container_title |
Frontiers in Plant Science |
container_volume |
12 |
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1790593590805659648 |