Abstract
Abstract The present study was carried out to investigate how plant growth-promoting bacteria (PGPB) influence plant growth and uptake of boron (B) and phosphorus (P) in rapeseed (Brassica napus). Rapeseed was subjected to control, B, P and B + P treatments, either with or without B. pumilus (PGPB) inoculation, and grown in pot culture for 6 weeks. In the absence of B. pumilus, the addition of B, P or both elements improved the growth of rapeseed compared with the control. Interestingly, B. pumilus inoculation inhibited plant growth and enhanced B uptake under B and B + P but not under control and P conditions. In addition, B. pumilus inoculation decreased the pH of soil under B and B + P supplies. Bacillus pumilus inoculation thus increased rapeseed B uptake and inhibited growth under B supply, which suggests that the effects of PGPB on rapeseed growth depend on the addition of B to soil. Bacillus pumilus inoculation may therefore be recommended for the enhancement of rapeseed B levels in B-deficient soils but not in B-sufficient ones.
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Claims 10
Claim · model-written summary
Boron addition improved rapeseed growth relative to control without B. pumilus.
Verbatim
e0“In the absence of B. pumilus, the addition of B, P or both elements improved the growth of rapeseed compared with the control”
Claim · model-written summary
Phosphorus addition improved rapeseed growth relative to control without B. pumilus.
Verbatim
e0“In the absence of B. pumilus, the addition of B, P or both elements improved the growth of rapeseed compared with the control”
Claim · model-written summary
Combined boron and phosphorus addition improved rapeseed growth relative to control without B. pumilus.
Verbatim
e0“In the absence of B. pumilus, the addition of B, P or both elements improved the growth of rapeseed compared with the control”
Claim · model-written summary
B. pumilus inoculation inhibited rapeseed growth under boron supply.
- Taxon
- rapeseedt0
- Treatment
- B. pumilus inoculatione0
- Interactor
- B. pumilusBacillus pumiluse0symbiont
- Outcome
- plant growthe0
- Direction
- inhibitede0
- Qualifier
- under Be0
Not reportedComparator
Verbatim
e0“B. pumilus inoculation inhibited plant growth and enhanced B uptake under B and B + P but not under control and P conditions”
t0“rapeseed”
Claim · model-written summary
B. pumilus inoculation inhibited rapeseed growth under combined boron and phosphorus supply.
- Taxon
- rapeseedt0
- Treatment
- B. pumilus inoculatione0
- Interactor
- B. pumilusBacillus pumiluse0symbiont
- Outcome
- plant growthe0
- Direction
- inhibitede0
- Qualifier
- B + Pe0
Not reportedComparator
Verbatim
e0“B. pumilus inoculation inhibited plant growth and enhanced B uptake under B and B + P but not under control and P conditions”
t0“rapeseed”
Claim · model-written summary
B. pumilus inoculation enhanced boron uptake under boron supply.
- Taxon
- rapeseedt0
- Treatment
- B. pumilus inoculatione0
- Interactor
- B. pumilusBacillus pumiluse0symbiont
- Outcome
- B uptakee0
- Direction
- enhancede0
- Qualifier
- under Be0
Not reportedComparator
Verbatim
e0“B. pumilus inoculation inhibited plant growth and enhanced B uptake under B and B + P but not under control and P conditions”
t0“rapeseed”
Claim · model-written summary
B. pumilus inoculation enhanced boron uptake under combined boron and phosphorus supply.
- Taxon
- rapeseedt0
- Treatment
- B. pumilus inoculatione0
- Interactor
- B. pumilusBacillus pumiluse0symbiont
- Outcome
- B uptakee0
- Direction
- enhancede0
- Qualifier
- B + Pe0
Not reportedComparator
Verbatim
e0“B. pumilus inoculation inhibited plant growth and enhanced B uptake under B and B + P but not under control and P conditions”
t0“rapeseed”
Claim · model-written summary
B. pumilus inoculation decreased soil pH under boron supply.
- Taxon
- rapeseedt0
- Treatment
- B. pumilus inoculatione0
- Interactor
- B. pumilusBacillus pumiluse0symbiont
- Outcome
- pH of soile0
- Direction
- decreasede0
- Qualifier
- under Be0
Not reportedComparator
Verbatim
e0“B. pumilus inoculation decreased the pH of soil under B and B + P supplies”
t0“rapeseed”
Claim · model-written summary
B. pumilus inoculation decreased soil pH under combined boron and phosphorus supply.
- Taxon
- rapeseedt0
- Treatment
- B. pumilus inoculatione0
- Interactor
- B. pumilusBacillus pumiluse0symbiont
- Outcome
- pH of soile0
- Direction
- decreasede0
- Qualifier
- B + Pe0
Not reportedComparator
Verbatim
e0“B. pumilus inoculation decreased the pH of soil under B and B + P supplies”
t0“rapeseed”
Claim · model-written summary
The authors recommend B. pumilus inoculation to enhance rapeseed boron levels in boron-deficient soils, but not boron-sufficient soils.
Verbatim
e0“Bacillus pumilus inoculation may therefore be recommended for the enhancement of rapeseed B levels in B-deficient soils but not in B-sufficient ones”
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