A la date du 3/02/2014
A 2-year, postdoctoral position, starting in 2014, is offered at LOV on microalgae ecophysiology, within PURPLE SUN, an ANR-funded research
When producing microalgae at large scale (in raceways or
photobioreactors), cells face intense shifts in temperature and
irradiance at short time scales and in a concomitant fashion. Excess of
solar energy is damageable for microalgae as it induces photosaturation
and photoinhibition, as well as the synthesis of photoprotective
pigments, and can also lead to a counterproductive increase in medium
temperature. As for temperature, low levels of irradiance may strongly
slow down productivity while high levels can rapidly become lethal.
We are interested in evaluating the effects of fluctuating patterns of
irradiance and temperature on the growth of marine or brackish strains.
Experiments will be performed to better understand and finally master
the effect of light quality, light intensity and temperature on
microalgae growth rate and bioaccumulation of energetic compounds.
The postdoctoral researcher will analyze the sensitivity of strains to
modified light spectra and fluctuations in temperature. In particular,
(s)he will investigate how light availability may stimulate the
production of platform molecules (in particular high energy carbon
storage molecules) by altering the composition of the light spectrum.
(S)he will thus be entrusted the cultivation of microalgae within
specifically designed growth reactors and the related biochemical
analyses. Because lipid storage and remobilization are closely related
to cell cycle, a first critical aspect of the project will be to
determine how light and temperature affect both the cell cycle and the
lipid metabolism. At a later stage, the effects of temperature will also be considered as these both affect the photosynthetic efficiency and the
growth rate. The research fellow will interact in close collaboration to
permanent researchers and a PhD student. At least 2 publications in
major peer review journals are expected from the work to be done.
- Oceanography or biotechnology background,
- Experience in phytoplankton/microalgae cultivation techniques (batch
and continuous cultures), biochemical analyses (such as measures of
chlorophyll content, total C & N, cellular pools like carbohydrates,
lipids), and cell growth monitoring (such as the use of cell counters,
spectrophotometers, flow cytometers).
- Good knowledge of spoken French or English as well of written English
- Will to work in a team and independency to carry out his/her own
Antoine Sciandra sciandra -at- obs-vlfr.fr
Sophie Rabouille srabouille -at- obs-vlfr.fr
Net Salary : 2000 euros (2700 USD)
Dead line : 15 february 2014