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Predictors of telomere content in dragon lizards
Faculty of Science - Papers (Archive) (2012)
  • Cissy Ballen, University of Sydney
  • Mo Healey, University of Sydney
  • Mark Wilson, University of Wollongong
  • Michael Tobler, University of Sydney
  • Mats Olsson, University of Sydney
Abstract
Telomeres shorten as a consequence of DNA replication, in particular in cells with low production of telomerase and perhaps in response to physiological stress from exposure to reactive oxygen species, such as superoxide. This process of telomere attrition is countered by innate antioxidation, such as via the production of superoxide dismutase. We studied the inheritance of telomere length in the Australian painted dragon lizard (Ctenophorus pictus) and the extent to which telomere length covaries with masscorrected maternal reproductive investment, which reflects the level of circulating yolk precursor and antioxidant, vitellogenin. Our predictors of offspring telomere length explained 72 % of telomere variation (including interstitial telomeres if such are present). Maternal telomere length and reproductive investment were positively influencing offspring telomere length in our analyses, whereas flow cytometry-estimated superoxide level was negatively impacting offspring telomere length. We suggest that the effects of superoxide on hatchling telomere shortening may be partly balanced by transgenerational effects of vitellogenin antioxidation.
Keywords
  • telomere,
  • predictors,
  • content,
  • lizards,
  • dragon
Publication Date
January 1, 2012
Publisher Statement

Ballen, C., Healey, M., Wilson, M., Tobler, M. & Olsson, M. (2012). Predictors of telomere content in dragon lizards. Naturwissenschaften, 99 (8), 661-664.

Citation Information
Cissy Ballen, Mo Healey, Mark Wilson, Michael Tobler, et al.. "Predictors of telomere content in dragon lizards" Faculty of Science - Papers (Archive) (2012)
Available at: http://works.bepress.com/mark_wilson/6/