Pseudonodules formation on barley roots induced by Rhizobium astragali


Y. Jing, Institute of Botany, Chinese Academy of Sciences, Beijing, 100044, China.


Abstract Symbiotic association Rhizobium astragali with barley roots was induced by a permanent magnetic field. Initially root hairs were deformed. Later, pseudonodules were formed, showing infected cells with infection threads, and bacteroids each enclosed within a peribacteroid membrane. The overall picture is similar to that of legume root nodules. No acetylene reduction activity could be detected in pseudonodules.