This Parasite Turns Plants Into Zombies

It’s a never-ending cycle of “Night of the Living Dead-meets-Dracula” in the world of green and leafy things.

A mustard plant infected with a certain parasite grows strangely, its development warped by tiny invaders. Its leaves take on odd shapes, its stems form a bushy structure called a witches’ broom and it may grow flowers that do not produce seed. Most peculiarly of all, it lives longer than its uninfected brethren, in a state of perpetual adolescence.

“It looks like it stays in a juvenile phase,” said Saskia Hogenhout, a scientist at the John Innes Centre in England, who studies the life cycle of the parasite, which is called Aster Yellows phytoplasma.

The plant’s neighbors grow old, reproduce and die, but the phytoplasma’s eerily youthful host persists. It becomes something like a mix between a vampire that never ages and a zombie host whose body serves the needs of its parasite, namely, tempting sap-sucking insects to feast on the plant’s bodily fluids as long as possible. When the insects ingest the parasite, they spread it to new hosts, and the whole “Night of the Living Dead-meets-Dracula” cycle repeats.