Plant Diversity ›› 1991, Vol. 13 ›› Issue (03): 1-3.

• Articles •    


LIUMei LIRui-Jun LIU Ming-Yuan   

  1. Department of Biology, Harbin Normal University
  • Online:1991-06-25 Published:1991-06-25

Abstract: The root system of ginseng is a tap root system. One year seedling only has main root and lateral roots, and adventitous roots often arise from the rootstock when it is more than two years old. Therefore, ginseng root system includes main root, adventitous roots and their branches. Primary xylem of main root is triarch, lateral roots, adventitous roots and branches at all levels are mostly triarches, rarely diarch. Root system increase with age adding. Before dormacy the last branches wither and fall, and winter root primodia are produced in higher order branches near withered positions every year. Those are the base of formation of all absorbing roots next year. One year ginseng produces one ring (or two rings) secondary res-in ducts from cambium. Afterwords, one ring secondary resin ducts increase with age adding and the increasing becomes slowly from five year ginseng.

Key words: Ginseng (Panax qinseng)