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.
Photo: 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 will 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.
Arabidopsis plants and false-color images of chlorophyll fluorescence from Arabidopsis seedlings and Nicotiana leaf
Malnoë A. (2018). Photoinhibition or photoprotection of photosynthesis? Update on the (newly termed) sustained quenching component qH. Environmental and Experimental Botany 154: 123-133
Malnoë, A., Schultink, A., Shahrasbi, S., Rumeau, D., Havaux, M., and Niyogi, K.K. (2018). The Plastid Lipocalin LCNP is Required for Sustained Photoprotective Energy Dissipation in Arabidopsis. Plant Cell 30: 196-208
An atypical short-chain dehydrogenase–reductase functions in the relaxation of photoprotective qH in Arabidopsis
Nature Plants 2020, 6(2):154-166
Photoinhibition or photoprotection of photosynthesis? Update on the (newly termed) sustained quenching component, qH
Environmental and Experimental Botany 2018, 154:123-133
The Plastid Lipocalin LCNP is Required for Sustained Photoprotective Energy Dissipation in Arabidopsis.
Plant Cell 2017, 30:196-208
The high light response and redox control of thylakoid FtsH protease in Chlamydomonas reinhardtii.
Molecular Plant 2016, 10:99-114
Gordon research conference on photosynthesis: from evolution of fundamental mechanisms to radical re-engineering
Photosynth Res 2015, 123(2):213-23
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
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
Nitric oxide-triggered remodeling of chloroplast bioenergetics and thylakoid proteins upon nitrogen starvation in Chlamydomonas reinhardtii
Plant Cell 2014, 26:353-72
Thylakoid FtsH protease contributes to photosystem II and cytochrome b6f remodeling in Chlamydomonas reinhardtii under stress conditions
Plant Cell 2014, 26:353-72
A conserved rubredoxin is necessary for photosystem II accumulation in diverse oxygenic photoautotrophs
J Biol Chem 2013, 288 (37): 26688-96
Photosynthetic growth despite a broken Q-cycle
Nat Commun 2011, 2:301
Transcriptome for photobiological hydrogen production induced by sulfur deprivation in the green alga Chlamydomonas reinhardtii
Eukaryot Cell 2008, 7(11):1965-79