Metadata details
ASAC_244
All scientific data collected by the Australian Antarctic program (AAp) are eventually described in the Catalogue of Australian Antarctic and Subantarctic Metadata (CAASM). CAASM can be used to search through AAp data descriptions, and it also provides links to access publicly available datasets, which can either be immediately downloaded or obtained from the Australian Antarctic Data Centre (AADC).
- Citation
- Adamson, H. (2000) Photosynthetic Attributes of Antarctic Plants, Ver. 1, Australian Antarctic Data Centre - https://data.aad.gov.au/metadata/ASAC_244, (Restricted access)
- Title
- Photosynthetic Attributes of Antarctic Plants
- Data Centre
- Australian Antarctic Data Centre, Australia
- Created Date
- 2000-07-20
- Revision Date
- 2017-04-26
- Parent record
- None
Datasets and documents
Related links
Description
Metadata record for data from ASAC Project 244 See the
link below for public details on this project.
From the abstracts of the referenced papers:
Photoinhibition of Grimmia antarctici (Grimmia is now known as Schistidium) during the summer at Casey, East Antarctica, was indicated by a reduction in photosynthetic capacity (light saturated photosynthetic rate), photosynthetic efficiency (photon yield of O2 evolution), photochemical quantum yield (ratio of variable to maximum fluorescence) and rate of fluorescence quenching when plants were exposed to moderate light at low temperature. We suggest that photoinhibition is a major factor limiting bryophyte productivity in Antarctic ecosystems.
Variation in leaf pigmentation from green to ginger is observed for Ceratodon purpureus (Hedw.) Brid. in Antarctica. Electron microscopy of ginger and green leaves reveals less thylakoid stacking, a response to greater light exposure, in the ginger leaves. In extremely exposed sites C. purpureus has low chlorophyll a/b ratios which correlate with decreased 77K chlorophyll fluorescence, indicating damage to chlorophyll a. Pigment analysis of ginger moss shows that even when the chlorophyll a/b ratio has not decreased the pigment composition differs from green moss. The increase in anthocyanin and decrease in chlorophyll concentrations largely account for the visual change from green to ginger. The ratio of total carotenoid to chlorophyll varies from 0.35 in green moss to 0.55 in the ginger moss, with violaxanthin increased preferentially. Since these changes in pigmentation are consistent with photoprotection and they are linked to light depended variations in chloroplast structure, it appears that photoprotective pigments are a useful adaptation for the bright Antarctic environment.
Quality
Values provided in temporal and spatial coverage are approximate only.
Access
PDF copies of some of the referenced papers are available for download from the provided URL to AAD staff only.
Temporal Coverages
- Start date: 1986-09-30 - Stop date: 1988-01-31
Spatial Coverages
Science Keywords
- EARTH SCIENCE > BIOSPHERE > VEGETATION > PHOTOSYNTHETICALLY ACTIVE RADIATION
- EARTH SCIENCE > BIOSPHERE > VEGETATION > PIGMENTS
- EARTH SCIENCE > BIOSPHERE > VEGETATION > PLANT CHARACTERISTICS
- EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MOSSES/HORNWORTS/LIVERWORTS
- EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PHOTOSYNTHESIS
Additional Keywords
- pigments
- photosynthesis
- photoprotective
- casey
- moss
- Ceratodon purpureus
- Grimmia antarctici
- Schistidium antarctici
Locations
- CONTINENT > ANTARCTICA > CASEY
- GEOGRAPHIC REGION > POLAR
Platforms
- LABORATORY
- FIELD INVESTIGATION
Instruments
- High-Performance Liquid Chromatograph
- OXYGEN METERS
- SPECTROPHOTOMETERS
- FLUOROMETERS
Researchers
- adamson (deceased), heather (INVESTIGATOR,TECHNICAL CONTACT)
- connell, dave (DIF AUTHOR)
Use Constraints
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_244 when using these data.
