Soybean (
Glycine max
[L.] Merr.) root rot is an important
disease of soybean under continuous cropping, and root rot
is widely distributed throughout the world. This disease
is extremely harmful, and it is difficult to prevent and
control. The study aimed to elucidate the composition of
root rot pathogenic fungal communities in the continuous
cropping of soybean. In this study, we employed PCRDGGE
technology to analyze the communities of root rot
pathogenic fungi in soybean rhizosphere soil subjected to
continuous cropping during a season with a high incidence
of root rot in Heilongjiang province, China, the main
soybean producing area in China. The results of 13 DGGE
bands were analyzed by phylogenetic revealed that the
predominant root rot pathogenic fungi in rhizosphere soil in
the test area were
Pythium ultimum
and
Fusarium
species.
The results of cluster analysis showed that the duration
of continuous cropping, the soybean variety and the plant
growth stage all had significant effects on the diversity of
root rot pathogenic fungi in rhizosphere soil.
