Why Are Mitochondria's Splicing Skills Weaker in Parasitic Plants?

Mitochondria, the powerhouses of cells, have their own genome. This genome works closely with the nucleus to manage crucial genes for energy production. One key process is splicing, where plant mitochondria cut and reconnect pieces of genetic material. This study looked at 25 of these splicing events in 15 different plants, both free-living and parasitic.Parasitic plants, also known as holoparasites, showed weaker splicing skills. This could be due to their unique evolution, as they don't photosynthesize and rely on other plants for food. Scientists thought that borrowing genes from other plants (horizontal gene transfer) might affect splicing. Surprisingly, this wasn't the case. Other factors, like their parasitic lifestyle, might be causing the weak splicing. Understanding why parasitic plants have weaker splicing can help us learn more about how genes work in these unique plants. It also shows that many factors, not just gene borrowing, can influence how genes are managed in cells.