Who would want a plant to glow when it could burn?
By twiddling around with genetic structures, cellular metabolism could be altered to synthesize ethanol from basic sugars. By careful distillation of the finished product (possibly by ethanol vaporization in leaves) the plant could surround itself with a 200 proof alcoholic haze. Animals then wander in, get DT's and die, fertilizing the plant. Almost as good as my design for the exploding turnip or the Russian Vodka Potato.