Scientists have pioneered a genetically modified "super potato" that glowswhen it needs water, the head of the project said on Monday, Reuters reports. Researchers at Edinburgh University injected potato plants with afluorescence gene borrowed from the luminous jellyfish aequorea victoria,which causes their leaves to glow green when dehydrated."This is an agriculture of the future," Professor Anthony Trewavas toldReuters. The potatoes are not intended to be eaten but would act as"sentinels," planted beside the commercial crop to alert a farmer that therest of his field needed watering. The glow is barely visible to the naked eyebut can be detected using a small hand-held device. Field trials are due tostart next year though Trewavas predicted it could take some 20 years beforethe plants are commonly used.