Plastid genome evolution across the genus Cuscuta(Convolvulaceae): two clades within subgenus Grammica exhibit extensive gene loss

parasitic plant genus Cuscuta
Thomas Braukmann
This week’s hot paper is about parasites of the floral kind. Ph.D. student Thomas Braukmann (Stefanovic Lab) just published: “Plastid genome evolution across the genus Cuscuta (Convolvulaceae): two clades within subgenus Grammica exhibit extensive gene loss”, in Journal of Experimental Botany. In this paper, Thomas examined how parasitism has affected the evolution of photosynthesis within the parasitic plant genusCuscuta (dodders).

Specifically, he identified two clades that exhibit reduced plastid genomes compared to other dodders, where one clade has experienced a stepwise reduction in the size and complexity of the plastid genome, while in the other the very presence of a plastid genome is questionable. These results provide insight into the evolution and function of the chloroplast, and how such complexity can be lost via parasitism.

Great work, Thomas!

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