summary
Mutating a single gene in parenial grass may give it more roots. Grasses like this are important so biofuel crops can be harvested repeatedly. Biofuel crops usually arent able to be harvested until the second or third year but due to the gene mutating it makes it be able to happen much faster. A team of scientist appears to have found a way to do that to the parenial grasses. It's possible that by manipulating a single gene you could get a plant to grow at a much faster pace.

Opinion
I think that growing plants much faster is cool. It could help us grow more biofuels much faster and harvest more crops in their planting season. If there are more scientist willing to do this sort of thing for us are world could be a much more sofisticated place. I think its pretty amazing there is guys dedicationg their whole lives for science to make the world a better place. Thats what I think about plant gene mutation.
http://www.biologynews.net/archives/2010/11/11/gene_discovery_suggests_way_to_engineer_fastgrowing_plants.html