Vitamin B₆ (VB₆) is a generic term referring to six interconvertiblecompounds,pyridoxine,pyridoxal,pyridoxamine and their phosphorylated derivatives,pyridoxine 5′-phosphate,pyridoxal 5′-phosphate and pyridoxamine 5′-phosphate.Pyridoxal 5′-phosphate is the catalytically active form of VB₆,andacts as cofactor in more than 140 different enzyme reactions.VB₆ is synthesized de novo by two different enzymatic pathways,the DXP (1′-deoxy-D-xylulose-5′-phosphate)- dependent pathway of E.coli and a few other bacteria,and the DXP- independent pathway found in almost all other organisms,except for animals.In addition to the de novo pathways,another pathway is found in all organisms,and functions to convert the six different VB₆ forms between each other.This pathway is called the “salvage pathway”.This article summarizes the current knowledge on the de novo synthetic pathway and the salvage pathway of VB₆ in plants.