Hey all
well, didnt have time to read the ten middle pages of this thread, but...I would like to add my two cents.
So, i've been working in tissue culture for the past two years, and...this is very possible. the things is, fan leaves are (probably) too old to display the type of totipotency (the ability for a single cell to regenerate into a whole new plant) that is needed.
Here is how you would do it:
Grow your seed until it is the size of the plants in my avatar. basically you want cotyledons fully grown, with the first true leaves JUST beginning to appear/less than half a centimeter.
at that point you cut off the cotyledons, you'll want to cut off the very end, about 2 or 3mm of the end of the cotyledon.
now, I use aseptic agar and sterile conditions to do this...but it should be possible in soil. you'll want to supply a very specific ration of auxin to cytokinins, my magical 'shoot regeneration formula' is 2 milligrams/liter cytokinins (I use trans-zeatin-riboside) and 0.1 milligram/liter auxin (I use I.A.A, Indole-3-acetic acid) after a few weeks a very small callus will appear on the cut ends of the cotyledon, and a bunch of new shoots will start growing out of the cuts.
at that point you cut the shoots off the cotyledon and transfer them to new media, one that has the right formulation to cause roots to grow. I use 5 milligrams/liter I.A.A, thats all.
in another few weeks you should have roots forming.
It's actually pretty simple. well, it's pretty simple when you've got a lab, autoclave, agar, powdered plant hormones, etc.
I'll post some pictures of this process done with tomatoes
Appropriately aged plants for totipotent regeneration:
Cotyledons and hypocotyls (stems) regenerating callus and then shoots:
After the shoot has gotten big enough, you put it on the rooting media:
Sorry, I dont have any pics on this PC of the actually rooted plants...but i've grown plenty of them out to the point where they can be transplanted into soil, and they grow up and become whole new plants, producing fruit.
so, this can be done. it's not some "stick it in dirt and pray" thing...I doubt that would work, but, it can be done.