Differences in response to colchicine by differentiating xylem cells in roots of Pisum.

Abstract

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