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!