DIFFERENCES IN RESPONSE TO COLCHICINE BY DIFFERENTIATING XYLEM CELLS IN ROOTS OF PISUM

A 3 hour exposure of pea roots to 0.025 per cent colchicine causes the cessation of root growth and a c-tumour to form. In roots allowed to regenerate it is found that in the region of the c-tumour, metaxylem tissue fails to differentiate completely, but protoxylem is unaffected. Development of secondary xylem tissue is also inhibited in the tumour region. © 1969 Springer-Verlag.