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Scientific result | Article | Photosynthesis
A team from I2BC shows, by using super-resolution fluorescence microscopy and transmission electron microscopy approaches, that both excess and deficiency of Mn affect the organization of thylakoid membranes and photosynthetic electron transport in the plant Marchantia polymorpha. M polymorpha, due to its simple morphology, turns out to be an interesting model for the study of metal homeostasis by new analytical methods.
Manganese (Mn) is an essential metal for plant growth. It plays a major role in the chloroplast, in the photosynthetic chain of Photosystem II where it forms a cluster Mn4CaO5, which catalyzes the oxidation of water. Mn deficiency affects photosynthesis while its excess is toxic. In order to understand the role of Mn in the structure and function of the photosynthetic apparatus, the researchers studied the effects of variations in its concentration in the model plant Marchantia polymorpha. They show that both an excess and a deficiency of Mn disorganize the thylakoid membrane (cell membrane inside the chloroplast, seat of photosynthesis) and affect the transport of photosynthetic electrons. For more information, see the news on the I2BC website Contact : Anja Krieger firstname.lastname@example.org ; Anja.Krieger-Liszkay@i2bc.paris-saclay.fr
Marine Messant, Umama Hani, Thaïs Hennebelle, Florence Guérard, Bertrand Gakière, Andrew Gall, Sébastien Thomine, Anja Krieger-Liszkay, Manganese concentration affects chloroplast structure and the photosynthetic apparatus in Marchantia polymorpha. Plant Physiology, 2023, kiad052 https://doi.org/10.1093/plphys/kiad052
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.