Due to routine maintenance, access to the Library Open Repository will be interrupted on the morning of Friday 12th February.
We apologise for any inconvenience.

Library Open Repository

Photosynthetic response and recovery of Antarctic marine benthic microalgae exposed to elevated irradiances and temperatures


Downloads per month over past year

Salleh, S and McMinn, A (2011) Photosynthetic response and recovery of Antarctic marine benthic microalgae exposed to elevated irradiances and temperatures. Polar Biology, 34. pp. 855-869. ISSN 0722-4060 (Print) 1432-2056 (Online)

[img] PDF
Selleh_PB2011.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.


Exposure to high temperatures affects the photosynthetic processes in marine benthic microalgae by limiting the transport of electrons, thus reducing the ability of the cell to use light. This causes damage to the Photosystem II (PSII) and may lead to photoinhibition. However, the PSII of benthic microalgal communities from Brown Bay, eastern Antarctica, were relatively unaffected by significant changes in temperature. Benthic microalgae exposed to temperatures up to 8C and an irradiance of 450 lmol photons m-2 s-1 did not experience any photosynthetic damage or irreversible photoinhibition. The effective quantum yield (DF/Fm0) at 8C (0.433 ± 0.042) was higher by comparison to cell incubated at -0.1C (0.373 ± 0.015) with similar irradiances. Temperatures down to -5C at a similar irradiance showed a decrease in photosynthesis with decreasing temperature, but no severe photoinhibition as the cells were able to dissipate excess energy via non-photochemical quenching and recover from damage. These responses are consistent with those recorded in past studies on Antarctic benthic microalgae and suggest that short-term temperature change (from -5 to 8C) will not do irreversible damage to the PSII and will not affect the photosynthesis of the benthic microalgae.

Item Type: Article
Keywords: Antarctic benthic microalgae, Photoinhibition, Recovery, Temperature
Journal or Publication Title: Polar Biology
Page Range: pp. 855-869
ISSN: 0722-4060 (Print) 1432-2056 (Online)
Identification Number - DOI: 10.1007/s00300-010-0943-4
Additional Information: The final publication is available at http://www.springerlink.com
Date Deposited: 27 Oct 2011 04:42
Last Modified: 18 Nov 2014 04:24
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page