pericycle reaction周环反应
pericycle cells中柱鞘细胞
outer pericycle外生中柱鞘
inner pericycle内生中柱鞘
pericycle e中柱鞘
pericycle-compound架环化合物
inner driving drum pericycle内生中柱鞘
N（名词） a layer of plant tissue beneath the endodermis: surrounds the conducting tissue in roots and certain stems 中柱鞘