I want to know the answer to the following question:
What opened the door to plant genetic engineering?
All the background I'm provided with is that "The concept originally stated by Gottlieb Haberlandt in 1902 that all plant cells are totipotent and can be grown in vitro ultimately enabled the use of genetic engineering experimentally to knock out a gene or genes responsible for a specific trait, or to add genes such as GFP that report when a gene of interest is being expressed.". Is that enough to answer the question?
Answer: yes