To prove that a new-gene editing technology could be used to alter the cassava plant, scientists in the St. Louis suburbs zeroed in on a gene used to process chlorophyll. Before long, they had petri dishes full of seedlings that were white as chalk.
The plan is to use CRISPR — a cheaper, faster way to genetically modify crops — to grow cassava plants that are resistant to common plant viruses threatening food supplies in East Africa. But regulatory agencies have yet to finalize how they will treat the new crops.
“It’s only really been available for use in plants for three, four years,” said principal investigator Nigel Taylor, of the Donald Danforth Plant Science Center in Creve Coeur. “Right now, it’s an experimental tool.”