板栗插条不定根原始体为诱生根原始体。不定根原基起源于维管束形成层细胞或紧靠维管形成层初生韧皮部中的薄壁细胞。愈伤组织不形成不定根原基，其中有些细胞分化为厚壁细胞。试验中发现有极少数不定根从愈伤组织长出，但其根原基起源仍然是维管形成层细胞或紧靠维管形成层初生韧皮部中的薄壁细胞。不定根上的侧根起源于中柱鞘细胞 Chestnut adventitious root primordia for the induction of root primordia. Adventitious root primordia originate from vascular bundles or in close proximity to the parenchyma in the phloem of the vascular layer. Callus does not form adventitious root primordia, some of which differentiate into thick-walled cells. A very small number of adventitious roots were found to grow from the callus during the experiment, but their root primordia still originated as vascularized cells or parenchyma in the primary phloem of the vascular cambium. The adventitial lateral roots originate from pericycle cells