Post-transcriptional gene silencing (PTGS) and VIGS in plants

[Skwrl]

Hello!

I'm looking for a book, a website or a person that could clearly explain the basics and the differences between post-transcriptional gene silencing (PTGS) and virus-induced gene silencing (VIGS) in plants. All the articles I've found this far have been very confusing (or maybe it's just me and my English reading comprehension and translating skills not working today).

Could you help me, please?
And thanks already in advance!

 

[Skwrl]

...oh well. With the help of a friend, I eventually found a rather good review article.
In case someone else needs it, just look for:

Turgay Unver and Hikmet Budak: Virus-Induced Gene Silencing, a Post Transcriptional Gene Silencing Method (International Journal of Plant Genomics, Volume 2009, Article ID 198680)