HUANG Yi-jie,DONG Lin-lin,WEI Guang-fei,et al.Development and Evaluation of Biocontrol Agents Against Panax ginseng Root Rot[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(02):182-190.
HUANG Yi-jie,DONG Lin-lin,WEI Guang-fei,et al.Development and Evaluation of Biocontrol Agents Against Panax ginseng Root Rot[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(02):182-190. DOI: 10.13422/j.cnki.syfjx.20211516.
Development and Evaluation of Biocontrol Agents Against Panax ginseng Root Rot
To develop safe and effective microbial agents against
Panax ginseng
root rot.
Method
2
P. notoginseng
endophytes were screened in plate confrontation tests, followed by morphological and molecular biological identification of antagonistic strains, optimization of strain fermentation conditions in a single factor test, and determination of optimal carriers and auxiliary agents of the microbial agent and their ratio using response surface methodology for formulating the production process. The prevention and control effects of the microbial agent were verified in the confrontation and pot culture experiments.
Result
2
The plate confrontation test yielded a strain named
Fusarium pseudoanthophilum
with significant resistance to root rot, and its antibacterial rate was 53.33%. According to the single factor test, the fermentation conditions of
F. pseudoanthophilum
were determined to be fermentation time 60 h, fermentation temperature 26 ℃, speed 120 r·min
-1
, and pH 6.5. The response surface optimization results showed that the number of viable bacteria reached the maximum (5.23×10
9
cfu·g
-1
) when the peat was 60.00 g, sodium carboxymethylcellulose 3.50 g, and sodium alginate 4.76 g. The influences of carriers and auxiliary agents on the number of viable bacteria were sorted by degree in a descending order as follows: peat
>
sodium carboxymethylcellulose
>
sodium alginate. The confrontation test results showed that when the microbial agent concentration was greater than 1.00 g·L
-1
, it had a significant inhibitory effect on the root rot pathogen
F. oxysporum
and the inhibitory rate was more than 42.3%. As demonstrated by the pot culture experiment, the inoculation of biocontrol agent for 28 d significantly reduced the incidence (66.99%) of root rot in
P. ginseng
seedlings and disease index (61.69%) and increased their leaf length (33.04%) and fresh weight (34.48%).
Conclusion
2
F. pseudoanthophilum
inoculant is efficient in preventing and controlling the root rot, making it worthy of further development and utilization.
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Biocontrol Effect and Culture Condition Optimization of Trichodermacitrinoviride Strain Isolated from Rhizosphere of Atractylodes lancea
Optimal Potassium Application Rate for Panax ginseng
Effects of Exogenous Fusarium oxysporum and Trichoderma viride on Soil Fungal Community of Panax ginseng
Identification of Panax ginseng and Panax quinquefolius by Mitochondrial Cox Ⅱ Intron
Related Author
XU Fuyu
LUO Hongbing
ZHONG Lingyun
YANG Songhong
DENG Qi
LIU Bin
ZHONG Simin
ZHOU Ying
Related Institution
Jiangxi Institute of Quality and Standardization
Jiangxi University of Chinese Medicine
Key Laboratory of Biology and Cultivation of Herb Medicine, Ministry of Agriculture and Rural Affairs
State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences
School of Traditional Chinese Medicine, Guangdong Pharmaceutical University