Putting it in to perspective

As I read more papers covering DNA barcoding I had a few questions of my own. one of these questions was why does every paper focus on the cytochrome c oxidase gene. why is it the special one. the answer was pretty simple. According to ibol.org this gene is used because its short enough to be sequenced quickly and cheaply. My next question was does this gene work well for barcoding other living things such as plants. Plants are barcoded using two genes from the chloroplasts, matK and rbcL. This website also gives an overall descripition of the barcoding process.

Here is the link to the website for more information:

http://www.ibol.org/about-us/background/
http://www.ibol.org/about-us/what-is-dna-barcoding/