Nature and Rate of Development of Root System of Apocynum cannabinum

Publisher Website
Google Scholar
Abstract
A study of the dogbane plant grown without competition in a typical upland soil in eastern Kansas. Periodic excavations during 28 weeks after seedling emergence disclosed that the root system consisted of the original tap root (primary vertical root); one to several permanent lateral roots (1st order) which grew horizontally in a plane parallel to the soil surface in the upper foot of the soil; and additional vertical roots (secondary verticals) which arose on the permanent lateral roots. Branch lateral roots (permanent laterals of the 2d order) arose on the first, those of the 3d order on the 2d, etc. Individual plants made a vertical penetration of 7 ft. and a radial spread of approx. 12 ft. in a growing season of 7 months. Shoot development, other than from the plumule, was from root-borne buds which had no regularity of placement on the permanent lateral roots. The general type of development exhibits certain similarities to, and certain differences from, the type common to field bindweed, hoary cress and Russian knapweed. Various general comparisons are made with the root systems of those plants.

This publication has 0 references indexed in Scilit: