Abstract
Abstract Background Fusarium wilt of banana is one of the most destructive diseases in banana-growing regions worldwide. Soil-borne diseases and soil microbial communities are closely related. The screening of antagonistic bacteria from soil microorganisms in areas with Fusarium wilt of banana is of great practical significance for controlling this disease. Results A strain designated FS-4 was isolated from healthy banana rhizosphere soil in an area affected by Fusarium wilt. This strain exhibited a significant antagonistic effect on the pathogen. Pot experiments revealed that the fermentation broth of strain FS-4 not only decreased the incidence of banana Fusarium wilt, but also promoted the growth of banana seedlings. The strain was identified as Streptomyces ma. by its morphological, physiological, and biochemical characteristics and 16S rRNA gene sequence analysis. The culture and fermentation conditions for this strain were optimized by single-factor and response surface experiments. The optimum culture conditions for Streptomyces ma . FS-4 were as follows: peptone 0.5%, saccharose 2.4, 0.05% K 2 HPO 4 , 0.05% MgCl 2 , and 0.05% NaCl at an initial pH of 7.0; 180 g at 28 °C; and inoculation size of 6% for 62 h. The diameter of bacteriostasis circle for Bacillus subtilis reached 26.7 mm. Conclusion Streptomyces ma . FS-4 is an important microbial resource as a biological agent for the control of plant pathogenic fungi and can be used to promote banana growth.
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Claims 7
Claim · model-written summary
FS-4 had significant antagonism against the wilt pathogen.
- Outcome
- antagonistic effect on the pathogene0
Not reportedTaxonInteractor
Verbatim
e0“This strain exhibited a significant antagonistic effect on the pathogen.”
Claim · model-written summary
FS-4 broth reduced banana Fusarium wilt incidence.
- Taxon
- bananae0
- Treatment
- fermentation broth of strain FS-4e0
- Outcome
- incidence of banana Fusarium wilte0
- Direction
- decreasede0
FusariumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiments revealed that the fermentation broth of strain FS-4 not only decreased the incidence of banana Fusarium wilt, but also promoted the growth of banana seedlings.”
Claim · model-written summary
FS-4 broth promoted banana seedling growth.
- Taxon
- bananae0
- Treatment
- fermentation broth of strain FS-4e0
- Interactor
- strain FS-4e0biocontrol_agent
- Outcome
- growth of banana seedlingse0
- Direction
- promotede0
Not reportedComparator
Verbatim
e0“Pot experiments revealed that the fermentation broth of strain FS-4 not only decreased the incidence of banana Fusarium wilt, but also promoted the growth of banana seedlings.”
Claim · model-written summary
The isolate was identified as Streptomyces ma.
- Outcome
- Streptomyces ma.e0
Not reportedTaxon
Verbatim
e0“The strain was identified as Streptomyces ma. by its morphological, physiological, and biochemical characteristics and 16S rRNA gene sequence analysis.”
Claim · model-written summary
Optimized culture conditions for strain FS-4 were specified.
Not reportedTaxon
Verbatim
e0“The optimum culture conditions for Streptomyces ma . FS-4 were as follows: peptone 0.5%, saccharose 2.4, 0.05% K 2 HPO 4 , 0.05% MgCl 2 , and 0.05% NaCl at an initial pH of 7.0; 180 g at 28 °C; and inoculation size of 6% for 62 h.”
Claim · model-written summary
The Bacillus subtilis inhibition zone reached 26.7 mm.
- Interactor
- Bacillus subtilis
Bacillus subtilise0other - Outcome
- diameter of bacteriostasis circle for Bacillus subtilise0
- Value
- 26.7 mme0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The diameter of bacteriostasis circle for Bacillus subtilis reached 26.7 mm.”
Claim · model-written summary
The authors propose FS-4 for pathogen control and banana growth promotion.
Verbatim
e0“Streptomyces ma . FS-4 is an important microbial resource as a biological agent for the control of plant pathogenic fungi and can be used to promote banana growth.”
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