Excised roots were used to determine variation in suckering capacity among and within lateral roots of an aspen (Populus tremuloides Michx.) clone. Differences among lateral roots were significant. Within segments of a lateral root sucker production showed a high degree of polarity, increasing from the distal to proximal ends. There was no evidence of a gradient in suckering capacity in a segmented root; i.e., distal segments were not significantly different from proximal ones. This indicated that aging was not a factor regulating suckering within lateral roots. Sucker production was not affected by root length.
United States Department of Agriculture, Forest Service, "Variation in Suckering Capacity Among and Within Lateral Roots of an Aspen Clone" (1978). Forestry. Paper 64.