Antarctic microfungi as a potential bioresource
The Antarctic occupies that region of the planet that falls below the 60th parallel of South latitude. Although it has been frequented by adventurers, journeyman scientists and tourists for the past 100 years, the Continent has remained virtually unoccupied. The intense cold, the absence of human oc...
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ftmacquariefig:oai:figshare.com:article/19427594 2023-05-15T13:41:11+02:00 Antarctic microfungi as a potential bioresource John Ronald Bradner 2009-08-21T00:00:00Z https://doi.org/10.25949/19427594.v1 https://figshare.com/articles/thesis/Antarctic_microfungi_as_a_potential_bioresource/19427594 unknown doi:10.25949/19427594.v1 https://figshare.com/articles/thesis/Antarctic_microfungi_as_a_potential_bioresource/19427594 In Copyright Other education not elsewhere classified Microfungi -- Antarctica -- Physiology Filamentous fungi -- Antarctica ITS sequences bioresource cold adapted enzymes filamentous fungi xylanase flow cytometry Antarctic microfungi hydrolytic enzymes oxidative stress Microfungi -- Antarctica mannanase Microfungi lipase fungal identification gene expression cryoprotectant compatible solutes Text Thesis 2009 ftmacquariefig https://doi.org/10.25949/19427594.v1 2022-12-28T08:43:48Z The Antarctic occupies that region of the planet that falls below the 60th parallel of South latitude. Although it has been frequented by adventurers, journeyman scientists and tourists for the past 100 years, the Continent has remained virtually unoccupied. The intense cold, the absence of human occupation and the limited range of local higher animal species have combined to create the impression that the Continent is virtually devoid of life. -- Although the microbiota of the Antarctic has attracted some small level of attention in the past, the examination of filamentous microfungi has been largely overlooked and fallen to a small group of dedicated investigators. In this study it will be shown that far from being an insignificant component of the Antarctic network, microfungi represent a potentially large and so far untapped bioresource. -- From just 11 bryophyte samples collected at four sites in the Ross Sea/Dry Valleys region of Southern Antarctica, some 30 microfungal isolates were recovered. Using molecular techniques, the internal transcribed spacer (ITS) region of the nuclear ribosomal DNA (nrDNA) was sequenced to reveal no less than nine unique microfungal species. For only two of these species did the ITS sequence data produce a 100% match with records held on the public databases. This investigation also highlighted the problems inherent in the traditional morphological identification system which are now being perpetuated in the molecular database records. -- A set of seven notionally identified isolates obtained from ornithogenic soil samples gathered in the Windmill Islands in Eastern Antarctica (offshore from the Australian Antarctic Division's Casey Station) were also subjected to molecular identification based on ITS sequence data. Each of the seven isolates was identified as a unique species; six were cosmopolitan in nature and the one remaining bore very little resemblance at the molecular level to any of the recorded species although it was provided with an epithet commonly used in the ... Thesis Antarc* Antarctic Antarctica Ross Sea Windmill Islands Research from Macquarie University Antarctic The Antarctic Ross Sea Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) Casey Station ENVELOPE(110.528,110.528,-66.282,-66.282) |
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Open Polar |
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Research from Macquarie University |
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ftmacquariefig |
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topic |
Other education not elsewhere classified Microfungi -- Antarctica -- Physiology Filamentous fungi -- Antarctica ITS sequences bioresource cold adapted enzymes filamentous fungi xylanase flow cytometry Antarctic microfungi hydrolytic enzymes oxidative stress Microfungi -- Antarctica mannanase Microfungi lipase fungal identification gene expression cryoprotectant compatible solutes |
spellingShingle |
Other education not elsewhere classified Microfungi -- Antarctica -- Physiology Filamentous fungi -- Antarctica ITS sequences bioresource cold adapted enzymes filamentous fungi xylanase flow cytometry Antarctic microfungi hydrolytic enzymes oxidative stress Microfungi -- Antarctica mannanase Microfungi lipase fungal identification gene expression cryoprotectant compatible solutes John Ronald Bradner Antarctic microfungi as a potential bioresource |
topic_facet |
Other education not elsewhere classified Microfungi -- Antarctica -- Physiology Filamentous fungi -- Antarctica ITS sequences bioresource cold adapted enzymes filamentous fungi xylanase flow cytometry Antarctic microfungi hydrolytic enzymes oxidative stress Microfungi -- Antarctica mannanase Microfungi lipase fungal identification gene expression cryoprotectant compatible solutes |
description |
The Antarctic occupies that region of the planet that falls below the 60th parallel of South latitude. Although it has been frequented by adventurers, journeyman scientists and tourists for the past 100 years, the Continent has remained virtually unoccupied. The intense cold, the absence of human occupation and the limited range of local higher animal species have combined to create the impression that the Continent is virtually devoid of life. -- Although the microbiota of the Antarctic has attracted some small level of attention in the past, the examination of filamentous microfungi has been largely overlooked and fallen to a small group of dedicated investigators. In this study it will be shown that far from being an insignificant component of the Antarctic network, microfungi represent a potentially large and so far untapped bioresource. -- From just 11 bryophyte samples collected at four sites in the Ross Sea/Dry Valleys region of Southern Antarctica, some 30 microfungal isolates were recovered. Using molecular techniques, the internal transcribed spacer (ITS) region of the nuclear ribosomal DNA (nrDNA) was sequenced to reveal no less than nine unique microfungal species. For only two of these species did the ITS sequence data produce a 100% match with records held on the public databases. This investigation also highlighted the problems inherent in the traditional morphological identification system which are now being perpetuated in the molecular database records. -- A set of seven notionally identified isolates obtained from ornithogenic soil samples gathered in the Windmill Islands in Eastern Antarctica (offshore from the Australian Antarctic Division's Casey Station) were also subjected to molecular identification based on ITS sequence data. Each of the seven isolates was identified as a unique species; six were cosmopolitan in nature and the one remaining bore very little resemblance at the molecular level to any of the recorded species although it was provided with an epithet commonly used in the ... |
format |
Thesis |
author |
John Ronald Bradner |
author_facet |
John Ronald Bradner |
author_sort |
John Ronald Bradner |
title |
Antarctic microfungi as a potential bioresource |
title_short |
Antarctic microfungi as a potential bioresource |
title_full |
Antarctic microfungi as a potential bioresource |
title_fullStr |
Antarctic microfungi as a potential bioresource |
title_full_unstemmed |
Antarctic microfungi as a potential bioresource |
title_sort |
antarctic microfungi as a potential bioresource |
publishDate |
2009 |
url |
https://doi.org/10.25949/19427594.v1 https://figshare.com/articles/thesis/Antarctic_microfungi_as_a_potential_bioresource/19427594 |
long_lat |
ENVELOPE(110.417,110.417,-66.350,-66.350) ENVELOPE(110.528,110.528,-66.282,-66.282) |
geographic |
Antarctic The Antarctic Ross Sea Windmill Islands Casey Station |
geographic_facet |
Antarctic The Antarctic Ross Sea Windmill Islands Casey Station |
genre |
Antarc* Antarctic Antarctica Ross Sea Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Windmill Islands |
op_relation |
doi:10.25949/19427594.v1 https://figshare.com/articles/thesis/Antarctic_microfungi_as_a_potential_bioresource/19427594 |
op_rights |
In Copyright |
op_doi |
https://doi.org/10.25949/19427594.v1 |
_version_ |
1766146569394978816 |