I would say that's more a topic for Biology.SE.
There's a line in our FAQ section What topics can I ask about here?
- plant biology, beyond what is generally gardening knowledge (try Biology),
while the Biology FAQ has a line item:
- questions about techniques in a biological or biochemical laboratory
The term "tissue culture" brings to mind images of microscopes and Petri dishes and cells growing in an agar jelly medium, none of which are typical gardening equipment. The purpose of tissue culture is generally to study how plants grow at a cellular level, again not a typical gardening concern (though I've seen a documentary where plants are cloned by culturing individual cells in a lab, a gardener typically clones plants using a pruner and maybe some hormone rooting powder).