TAIR (The Arabidopsis Information Resource)
The Arabidopsis Information Resource (TAIR) provides genomic and literature data about Arabidopsis thaliana. This project is a collaborative effort between the Carnegie Institution of Washington Department of Plant Biology and the National Center for Genome Resources (NCGR).
www.arabidopsis.org/   reviews

Nottingham Arabidopsis Stock Centre (NASC)
Stock centre providing Arabidopsis seed and information resources ...
nasc.life.nott.ac.uk/   reviews

The Meyerowitz Lab at Caltech
www.its.caltech.edu/~plantlab/   reviews