Hitchins V M, Sadoff H L
J Bacteriol. 1970 Oct;104(1):492-8. doi: 10.1128/jb.104.1.492-498.1970.
Cultures of Azotobacter vinelandii were induced to encystment with beta-hydroxybutyrate. The morphological events in the transition from cell to cyst were observed by electron microscopy of thin sections. Upon induction of encystment, cells became rounded and nonmotile. The exine coat developed by the continuous excretion of membranous components into the capsule surrounding the cell.
用β-羟基丁酸诱导棕色固氮菌培养物形成孢囊。通过对薄片进行电子显微镜观察，观察了从细胞到孢囊转变过程中的形态学变化。诱导形成孢囊后，细胞变圆且不再运动。外壁通过将膜状成分持续分泌到围绕细胞的荚膜中而形成。
