Thus far, 10 strains of endophyte have been isolated
from O. glabra in Inner Mongolia by Lu et al.
(2009). Forty-two strains of endophyte have been
isolated from A. variabilis, A. strictus, O. glabra, O.
kansuensis, O. ochrocephala, O. glacialis, and O.
sericopetala. Of these, 11 strains produce swainsonine
and have been classified as Undifilum oxytropis
according to both morphological characteristic and
the 5.8SrDNA/ITS sequence analysis (Yu 2009).
PCR-RFLP analysis of intergenic spacer (IGS)
region for those 11 endophyte strains showed that
the interspecific or intraspecific variations were