Aconitum carmichaeli Debx. (Ranunculaceae) is a potential
source of an important herbal drug named “Fuzi”, which is
derived from the lateral root of the plant. Increased therapeutic
usage resulted in the great demand for artificial cultivation
of A. carmichaeli, however, the obstacles caused by
continuous cropping is a serious problem. Continuous cropping
has shown to affect the soil biological and non-biological
factors. The current study attempted to discover the variations
of microbial communities and soil properties in shortterm
continuous cropping of A. carmichaeli. An experimental
procedure with A. carmichaeli planted two years continuously
was established. The variation of the soil microbial community,
disease incidence, soil properties, and the correlation
between soil microbe and disease incidence were investigated.
The disease incidence increased during the continuous cropping
of A. carmichaeli. The PCoA and LefSe results indicated
that fungal communities in rhizosphere soil were altered during
the short-term continuous croppingand the bacterial community
was disturbed by the cultivation of A. carmichaeli,
however, in the following two years of continuous cropping
period, the soil bacterial community has not changed obviously.
Proportions of some fungal and bacterial genera were
varied significantly (p < 0.05), and some genera of microflora
showed a significant correlation with adisease incidence of
A. carmichaeli. Microorganisms contributing to community
composition discrepancy were also elucidated. Continuous
cropping of A. carmichaeli disturbed the rhizosphere soil microbial
community and altered the soil chemical parameters
and soil pH. These variations in soil may be related to the
occurrence of plant diseases. The current study will not only
provide theoretical and experimental evidence for the A.
carmichaeli continuous cropping obstacles but will also contribute
to A. carmichaeli agricultural production and soil
improvement.
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of highly expressed growth-related genes, such as
PMA1 and some ribosomal protein genes. Although the Sir2
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mutant. Collectively, our results suggest that Hst1 can substitute
for Sir2 by deacetylating H4K16Ac only in the sir2Δ
pde2Δ.
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