callus GRE

This transforms the callus into a tougher fibrocartilaginous callus, which bridges the gap between the two pieces of bone.

这个过程将血痂变成一种更硬的纤维软骨痂，它把两块分裂的骨骼桥接在一起。

Under the selection pressure of crude toxin filtration, three kinds of treatment methods and four kinds of phytotoxin concentrations were used to screen the blast-resistant callus phenylalanine.

摘要以稻瘟病病原菌粗毒素为选择压，对水稻进行抗病性筛选，结果表明：粗毒素对水稻愈伤组织诱导、继代及分化有明显的抑制作用，抑制程度随毒素浓度高而增强，且品种间差异显著。