ZURICH -- For years, Swiss scientists have blithely created genetically modified rice, corn and apples. But did they ever stop to consider just how humiliating such experiments may be to plants? That's a question they must now ask. Last spring, this small Alpine nation began mandating that geneticists conduct their research without trampling on a plant's dignity. Beat Keller "Unfortunately, we have to take it seriously," Beat Keller, a molecular biologist at the University of Zurich. "It's one more constraint on doing genetic research." Dr. Keller recently sought government permission to do a field trial of genetically modified wheat that...