Abstract
Summary Iturin A is an important broad‐spectrum antifungal cyclic lipopeptide used as an ideal potential biological control agent. However, its application is limited mainly due to the producer strains’ low productivity and the high production costs. Here, a potentially industrial strain Bacillus amyloliquefaciens CX ‐20 was proved to use low‐cost rapeseed meal ( RSM ) as the sole source of all nutrients except the carbon source for the high productivity of iturin A. A fermentation model was first established to analyse the specific roles of different RSM components on iturin A production. Proteins and minerals in RSM were confirmed to play positive role, whereas fibre had negative effect. And the maximal concentration of iturin A was predicted to be more than 1.64 g l −1 by the established evaluation model. Moreover, submerged fermentation of B. amyloliquefaciens CX ‐20 demonstrated a strong ability to hydrolyse RSM and release water‐soluble nutrients. This fermentation broth, a mixture of Bacillus , iturin A and RSM hydrolysate, could simultaneously combat clubroot disease and promote the growth of Brassica napus . In conclusion, this study provides a promising strategy to achieve full utilization of RSM for the production of a combination of value‐added biological control agent and biofertilizer.
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Claims 7
Claim · model-written summary
B. amyloliquefaciens CX-20 used rapeseed meal as the sole nutrient source except carbon for high iturin A productivity.
Verbatim
t0“rapeseed meal fermentation model”
e1“as the sole source of all nutrients except the carbon source for the high productivity of iturin A”
Claim · model-written summary
Proteins and minerals in rapeseed meal had a positive role in iturin A production.
Verbatim
t0“rapeseed meal fermentation model for iturin A production”
e2“Proteins and minerals in RSM were confirmed to play positive role, whereas fibre had negative effect”
Claim · model-written summary
Fibre in rapeseed meal had a negative effect on iturin A production.
Verbatim
t0“rapeseed meal fermentation model for iturin A production”
e2“Proteins and minerals in RSM were confirmed to play positive role, whereas fibre had negative effect”
Claim · model-written summary
The established fermentation model predicted a maximal iturin A concentration of more than 1.64 g l −1.
Verbatim
e3“the maximal concentration of iturin A was predicted to be more than 1.64 g l −1 by the established evaluation model”
Claim · model-written summary
Submerged fermentation of B. amyloliquefaciens CX-20 showed a strong ability to hydrolyse rapeseed meal.
Verbatim
t0“rapeseed meal fermentation model”
e4“demonstrated a strong ability to hydrolyse RSM”
Claim · model-written summary
The fermentation broth could combat clubroot disease in Brassica napus.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse5 - Treatment
- fermentation brothe6
- Outcome
- clubroot diseasee5
- Direction
- decreaseinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e5“could simultaneously combat clubroot disease and promote the growth of Brassica napus”
e6“This fermentation broth, a mixture of Bacillus , iturin A and RSM hydrolysate”
Claim · model-written summary
The fermentation broth promoted growth of Brassica napus.
- Taxon
- Brassica napusBrassica napuse5
- Treatment
- fermentation brothe6
- Outcome
- growthe5
- Direction
- increaseinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“could simultaneously combat clubroot disease and promote the growth of Brassica napus”
e6“This fermentation broth, a mixture of Bacillus , iturin A and RSM hydrolysate”
The same questions in other papers
processing · growth · Brassica napus (oilseed rape)Positive and negative results
6 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
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See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.