伴孢晶体 meaning in English

parasporal crystal

This thesis studied on bacillus thuringiensis strain bt886 which was separated and selected by researchers of our laboratory . according to the observation of crystal shape and the bioassay of motschulsky and fairmaire , bacillus thuringiensis strain bt886 was identified as cry3 type , and the conclusion was assured by the further study on molecular level . the 1956 base pairs full lengrh homological cry3aa gene which was toxic to motschulsky was cloned and sequenced
以该菌株为材料，克隆出了对光肩星天牛( anoplophralabripennis ( motsch . ) )具有毒杀作用的cry3aa同源基因，并且对该基因进行了人工改造、人工合成、大肠杆菌表达、生物活性测定、双元表达载体的构建以及对杨树的转化等一系列研究，主要结果如下： ( 1 )显微观察该菌株所形成的伴孢晶体为方形。