The following links might be useful as:

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052005000400001

http://nzetc.victoria.ac.nz/tm/scholarly/tei-Bio06Tuat03-t1-body-d4.html

https://www.deepdyve.com/lp/american-society-of-plant-biologist/the-transition-to-flowering-qXw0GCgGXf

Hi, 

yes we made a lot of progress in regard of the florigen identity.

In the last years the FT and FT-like protein were addressed as the florigen. 

You can find more details in these reviews:

https://www.ncbi.nlm.nih.gov/pubmed/27348248

https://www.ncbi.nlm.nih.gov/pubmed/18444908

http://www.cell.com/trends/plant-science/pdf/S1360-1385(13)00025-3.pdf

THANKS

Dear Dr. Abbas

Florigen is a systemic signal that promotes flowering. Its molecular nature is a conserved FLOWERING LOCUS T (FT) protein that belongs to the PEBP family. Recent work identified FT orthologues as originators of florigen and their polypeptides as the likely systemic agent.

https://www.sciencedirect.com/science/article/pii/B9780128019221000051