Clément Boussardon

The absence of GCS-H2, an isoform of H-protein found in heterotrophic tissue, impedes the cell cycle, and drastically affects plant growth as it acts as the main relay for mitochondrial lipoylation.

This study identifies orf117Sha as the cause of gametophytic CMS in Arabidopsis, showing pollen death is grain-autonomous and preceded by mitochondrial swelling and developmental desynchronization.