Abstract
In this paper, the authors, in order to comprehend the outline on the detachment of rooted nodes which has an important role in the propagation of Kudzu vines, investigated (1) The number of root systems per plant and the developmental stage of these root systems (The root system is generally composed of several roots that differ in their function and form), (2) The total length of the connecting stem per plant (The stem between stubble and rooted node, or between one rooted node and another in a plant, were designated as the connecting stem.), (3) The internode composition of the total connecting stem of the plant with the number of vascular bundle rings and its composition ratio (The connecting stem is generally composed of internodes that differ in their number of bascular bundle rings). We were led to the following conclusions: In most cases, a rooted node is detached independently or a few of the rooted nodes in a line are detached from the stubble. Moreover, most rooted nodes are detached before their root systems grow to R-IV. The internodes of the connecting stem are generally dead or are cut off before the third vascular bundle ring is formed. These facts suggest that the detachment of rooted nodes is fairly frequent. The death and the cutting of connecting stems are caused by injury from insects and diseases, or from physiological deterioration of the internodes.
