By David ShukmanScience editor, BBC News
The prospect of genetically modified purple tomatoes reaching the shelves has come a step closer. Their dark pigment is intended to give tomatoes the same potential health benefits as fruit such as blueberries...
The pigment, known as anthocyanin, is an antioxidant which studies on animals show could help fight cancer. Scientists say the new tomatoes could improve the nutritional value of everything from ketchup to pizza topping...
"With these purple tomatoes you can get the same compounds that are present in blueberries and cranberries that give them their health benefits - but you can apply them to foods that people actually eat in significant amounts and are reasonably affordable," she said.
The tomatoes are part of a new generation of GM plants designed to appeal to consumers - the first types were aimed specifically at farmers as new tools in agriculture.
The purple pigment is the result of the transfer of a gene from a snapdragon plant - the modification triggers a process within the tomato plant allowing the anthocyanin to develop...
Canadian regulations are seen as more supportive of GM and that led to a deal with an Ontario company, New Energy Farms, which is now producing enough purple tomatoes... According to Prof Martin, the Canadian system... look at the trait not the technology... asking if what you're doing is safe and beneficial, not 'Is it GM and therefore we're going to reject it completely'... I hope this will serve as a vanguard product where people can have access to something that is GM but has benefits for them." ...
The aim is to use the juice in research to conduct a wide range of tests including examining whether the anthocyanin has positive effects on humans. Earlier studies show benefits as an anti-inflammatory and in
slowing cancers in mice.
A key question is whether a GM product that may have health benefits will influence public opinion... Prof Martin hopes that the purple tomato juice will have a good chance of being approved for sale to consumers in North America in as little as two years' time. She and other plant researchers in the UK hope that GM will come to be seen in a more positive light...
@ BBC News - Genetically-modified purple tomatoes heading for shops:
