Irish schoolgirls discover barley‑boosting bacteria from wart‑covered pea plant

In a quiet suburb of Kinsale, three schoolgirls embarked on a long‑term experiment after discovering a pea plant covered in warty growths. Over the course of three years, they tested 13,000 seeds in a spare bedroom, isolating bacteria from the warts that ultimately produced barley‑like grains. The unexpected conversion of a pea plant’s wart tissue into barley highlights a previously undocumented microbial capability.

The girls’ meticulous work involved culturing the bacteria, planting the seeds, and monitoring germination and growth. Their findings suggest that the bacteria can reprogram the plant’s cellular pathways, enabling the wart tissue to develop into a different crop species. This discovery could have implications for agricultural biotechnology, offering a novel route to crop diversification or resource‑efficient plant breeding.

The experiment has attracted attention beyond the local community, with the story generating discussion on Hacker News where it has received 29 points and nine comments. The case exemplifies the power of citizen science and long‑term, hands‑on experimentation to uncover surprising biological phenomena that may inform future research in plant science and microbiology.