Abstract:
This dataset consists of field measurements of Pseudogymnoascus roseus DNA concentrations in soil and three edaphic factors (soil temperature, water potential and snow depth) at Mars Oasis, Alexander Island, from 2009 to 2012, under different temperature, irrigation and substrate (glucose, glycine and tryptone soy broth) treatments. Laboratory measurements of hyphal extension rates, conidial germination, numbers of conidia produced per colony of fungus and specific enzyme activities of three P. roseus isolates are also included.
Keywords:
Mars Oasis, Pseudogymnoascus roseus, enzyme activity, quantitative-PCR, snow depth, soil decomposer fungus, soil warming, soil water potential, surface soil temperature
Newsham, K., Misiak, M., & Worland, M. (2020). Pseudogymnoascus roseus in soil at Mars Oasis, Alexander Island, under different temperature, irrigation and substrate treatments (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/1cf37889-9f77-41b9-8c49-b175fbd03406
| Access Constraints: | We strongly encourage contacting Kevin Newsham (kne@bas.ac.uk) for more information regarding this dataset, including guidance on its reuse. |
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| Use Constraints: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2020-05-27 |
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| Dataset Progress: | Planned |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | Dr Kevin Newsham |
| Role(s) | Metadata Author, Investigator |
| Organisation | British Antarctic Survey |
| Name | Marta Misiak |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Roger Worland |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Inhibited metabolism of a widespread Antarctic soil fungus in response to climate change by Marta Misiak, William P. Goodall-Copestake, Tim H. Sparks, M. Roger Worland, Lynne Boddy, Naresh Magan, Peter Convey, David W. Hopkins and Kevin K. Newsham (in prep). | |
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| Quality: | Raw data are shown. The data have not been cleaned. Missing data are indicated by NA. There are 1-2 missing data points in the water potential, DNA concentration, conidial density and hyphal extension rate data, caused principally by lack of material or analysis failure. 22 values are missing from the specific enzyme activity data, all of which were caused by analysis failure. | |
| Lineage: | The field experiment was set up in December 2007, at Mars Oasis. 64 circular plots (1 m diameter) were established, half of which were covered with open top chambers. In December 2007, 2009, 2010, 2011 and 2012, each of the 64 plots was assigned to one of four groups (16 plots in each group) and the soil underwent four different treatments: unamended; received glucose; received glycine (amino acid); received powdered tryptic soy broth (mix of amino acids and protein). Half of the chambered and half of the unchambered plots were then raised to 100% water holding capacity. The experimental layout resulted in 16 open top chamber-irrigation-substrate treatment combinations, each replicated four times in a randomised design. Temperature was monitored in three chambered and three unchambered plots between December 2009 and December 2012. Frozen soil samples were returned to the UK, where water potentials were measured. Laboratory experiments were also undertaken. Three Pseudogymnoascus roseus isolates were obtained from Mars Oasis soil using the soil plate method and identified by sequencing of ribosomal DNA. Quantitative-PCR assays were used to estimate the concentration of Pseudogymnoascus DNA present in soil. The hyphal extension rate analyses were undertaken in the lab, where isolates were grown for 10 weeks on soil extract medium at temperatures cycling daily from 2-18 ° C, 2-21 ° C and 2-24 ° C and at water potentials of -1.06 MPa, -3.60 MPa, -6.00 MPa and -10.80 MPa. At the end of the growth rate experiments, extracellular enzymes were extracted from colonies and the activities of β -1,4-glucosidase (cellulase), N-acetyl- β -glucosaminidase (chitinase), leucine aminopeptidase and alkaline and acid phosphatases were measured using p-nitrophenyl substrates. The impact of temperature cycle and water potential treatments on numbers of P. roseus conidia produced per colony was measured. The treatment effects on conidial germination were also quantified at modified water potentials. Complete methods can be downloaded with the data via the Get Data link. |
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| Temporal Coverage: | |
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| Start Date | 2007-12-01 |
| End Date | 2018-12-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -71.87833 |
| Northernmost | -71.87833 |
| Longitude | |
| Westernmost | -68.25 |
| Easternmost | -68.25 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Alexander Island, Mars Oasis |
| Data Collection: | Soil temperatures: TinyTag Plus 2 TGP-4017, Gemini Data Loggers Ltd., Chichester, UK Soil water potentials: WP4C, Decagon Devices, Inc., Pullman, WA, USA Q-PCR thermocycler: Eco 48 machine, PCRMax Ltd., Witford, UK Image analysis: ImageJ, National Institute of Health, Bethesda, MD, USA Plant growth cabinets: MCR-350 Versatile Environmental Test Chamber, Sanyo, Osaka, Japan Plate reader: Sunrise, TECAN, Austria |
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