Light in excess of photosynthetic capacity can be damaging to cells constituents. Thus ways to protect against damage have evolved in photosynthetic organisms, including ways to minimize light absorption, detoxify reactive oxygen species generated by excess light, and dissipate excess absorbed light. Together, these processes are known as photoprotection. - see also our lab website here -

AlizeeMalnoe 1920x1080Photo: Queena Xu

Despite the physiological importance of photoprotection, the molecular mechanisms that protect against light stress, especially those protecting against sustained light stress, remain largely unknown. In my group, we combine genetics, biochemistry, biophysics and physiology to elucidate the molecular mechanisms of photoprotection under sustained abiotic stress. Our research will provide insights into fundamental mechanisms of light energy capture, utilization and dissipation in plants.

AlizeeMalnoe picturesArabidopsis plants and false-color images of chlorophyll fluorescence from Arabidopsis seedlings and Nicotiana leaf

Publication list

  1. A Genetic Screen to Identify New Molecular Players Involved in Photoprotection qH in Arabidopsis thaliana
    Plants 2020, 9(11):E1565
  2. An atypical short-chain dehydrogenase–reductase functions in the relaxation of photoprotective qH in Arabidopsis
    Nature Plants 2020, 6(2):154-166
  3. Photoinhibition or photoprotection of photosynthesis? Update on the (newly termed) sustained quenching component, qH
    Environmental and Experimental Botany 2018, 154:123-133
  4. The Plastid Lipocalin LCNP is Required for Sustained Photoprotective Energy Dissipation in Arabidopsis.
    Plant Cell 2017, 30:196-208
  5. The high light response and redox control of thylakoid FtsH protease in Chlamydomonas reinhardtii.
    Molecular Plant 2016, 10:99-114
  6. Gordon research conference on photosynthesis: from evolution of fundamental mechanisms to radical re-engineering
    Photosynth Res 2015, 123(2):213-23
  7. Large-scale insertional mutagenesis of Chlamydomonas supports phylogenomic functional prediction of photosynthetic genes and analysis of classical acetate-requiring mutants
    Plant J 2015, 82: 337-351
  8. Distinct roles of the photosystem II protein PsbS and zeaxanthin in the regulation of light harvesting in plants revealed by fluorescence lifetime snapshots
    PNAS 2014, 111 (49) 17498-17503
  9. Nitric oxide-triggered remodeling of chloroplast bioenergetics and thylakoid proteins upon nitrogen starvation in Chlamydomonas  reinhardtii
    Plant Cell 2014, 26:353-72
  10. Thylakoid FtsH protease contributes to photosystem II and cytochrome b6f remodeling in Chlamydomonas reinhardtii under stress conditions
    Plant Cell 2014, 26:353-72
  11. A conserved rubredoxin is necessary for photosystem II accumulation in diverse oxygenic photoautotrophs
    J Biol Chem 2013, 288 (37): 26688-96
  12. Photosynthetic growth despite a broken Q-cycle
    Nat Commun 2011, 2:301
  13. Transcriptome for photobiological hydrogen production induced by sulfur deprivation in the green alga Chlamydomonas reinhardtii
    Eukaryot Cell 2008, 7(11):1965-79