Abstract
Abstract. The use of biofertilizers based on plant growth promoting (PGP) bacteria is a promising direction in agri-biotechnology. The purpose was to evaluate the PGP-attributes of Bacillus sp. and to reveal the morphophysiological features of rapeseed (Brassica napus L.) when inoculated with these rhizobacteria. Methods. The ability of Bacillus sp. strain TO15c isolated from the rhizosphere of Taraxacum officinale on Zack's nitrogen-free medium to produce indol-3-acetic acid (IAA) and phosphates was studied. In pot-scale experiments, the assessment of changes in the morphophysiological characteristics of rapeseed upon inoculation with rhizobacteria both in the absence and in the presence of nitrogen fertilizer was performed. At the end of 100-day vegetation, shoot length, total leaf area, fresh biomass, content of macronutrients and photosynthetic pigments were determined. Results. The ability of TO15c to produce IAA (up to 26 mg/L) and solubilize phosphate (up to 60 mg/L) has been proven. Soil inoculation with rhizobacteria in the presence of ammonium nitrate led to the increase in shoot length by 24 % and total leaf area by 16 %. The aboveground fresh biomass increased by 1.5 times, the underground by 2.5 times, and the content of macronutrients improved. The rise in the photosynthetic pigment content (1.5 times on average) was also noted when inoculated with TO15c. The maximum effect was achieved with the rhizobacteria and nitrogen fertilizer combined application. Scientific novelty. The effectiveness of Bacillus sp. TO15c on rapeseed increased in the presence of nitrogen fertilizer, despite the fact that these PGPR were able to fix atmospheric nitrogen.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Bacillus TO15c produced up to 26 mg/L IAA.
Not reportedDirection
Verbatim
e0“The ability of TO15c to produce IAA (up to 26 mg/L) and solubilize phosphate (up to 60 mg/L) has been proven.”
e1“rapeseed (Brassica napus L.)”
Claim · model-written summary
Bacillus TO15c solubilized up to 60 mg/L phosphate.
Not reportedDirection
Verbatim
e0“The ability of TO15c to produce IAA (up to 26 mg/L) and solubilize phosphate (up to 60 mg/L) has been proven.”
e1“rapeseed (Brassica napus L.)”
Claim · model-written summary
Inoculation with rhizobacteria plus ammonium nitrate increased rapeseed shoot length by 24%.
- Taxon
- rapeseede1
- Treatment
- Soil inoculation with rhizobacteria in the presence of ammonium nitratee0
- Interactor
- Bacillus sp. strain TO15ce2symbiont
- Outcome
- shoot lengthe0
- Direction
- increasee0
- Value
- 24 %e0
Not reportedComparator
Verbatim
e0“Soil inoculation with rhizobacteria in the presence of ammonium nitrate led to the increase in shoot length by 24 % and total leaf area by 16 %.”
e1“rapeseed (Brassica napus L.)”
e2“Bacillus sp. strain TO15c”
Claim · model-written summary
Inoculation with rhizobacteria plus ammonium nitrate increased rapeseed total leaf area by 16%.
- Taxon
- rapeseede1
- Treatment
- Soil inoculation with rhizobacteria in the presence of ammonium nitratee0
- Interactor
- Bacillus sp. strain TO15ce2symbiont
- Outcome
- total leaf areae0
- Direction
- increasee0
- Value
- 16 %e0
Not reportedComparator
Verbatim
e0“Soil inoculation with rhizobacteria in the presence of ammonium nitrate led to the increase in shoot length by 24 % and total leaf area by 16 %.”
e1“rapeseed (Brassica napus L.)”
e2“Bacillus sp. strain TO15c”
Claim · model-written summary
Aboveground fresh biomass rose 1.5 times after inoculation.
- Taxon
- rapeseede1
- Treatment
- inoculated with these rhizobacteriae2
- Interactor
- Bacillus sp. strain TO15ce3symbiont
- Outcome
- aboveground fresh biomasse0
- Direction
- increasede0
- Value
- 1.5 timese0
Not reportedComparator
Verbatim
e0“The aboveground fresh biomass increased by 1.5 times, the underground by 2.5 times, and the content of macronutrients improved.”
e1“rapeseed (Brassica napus L.)”
e2“when inoculated with these rhizobacteria”
e3“Bacillus sp. strain TO15c”
Claim · model-written summary
Underground fresh biomass rose 2.5 times after inoculation.
- Taxon
- rapeseede1
- Treatment
- inoculated with these rhizobacteriae2
- Interactor
- Bacillus sp. strain TO15ce3symbiont
- Outcome
- undergrounde0
- Direction
- increasede0
- Value
- 2.5 timese0
Not reportedComparator
Verbatim
e0“The aboveground fresh biomass increased by 1.5 times, the underground by 2.5 times, and the content of macronutrients improved.”
e1“rapeseed (Brassica napus L.)”
e2“when inoculated with these rhizobacteria”
e3“Bacillus sp. strain TO15c”
Claim · model-written summary
Macronutrient content improved after inoculation.
- Taxon
- rapeseede1
- Treatment
- inoculated with these rhizobacteriae2
- Interactor
- Bacillus sp. strain TO15ce3symbiont
- Outcome
- content of macronutrientse0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“the content of macronutrients improved.”
e1“rapeseed (Brassica napus L.)”
e2“when inoculated with these rhizobacteria”
e3“Bacillus sp. strain TO15c”
Claim · model-written summary
Inoculation with TO15c increased photosynthetic pigments by 1.5 times on average.
- Taxon
- rapeseede1
- Treatment
- inoculated with TO15ce0
- Interactor
- TO15ce0symbiont
- Outcome
- photosynthetic pigment contente0
- Direction
- risee0
- Value
- 1.5 times on averagee0
Not reportedComparator
Verbatim
e0“The rise in the photosynthetic pigment content (1.5 times on average) was also noted when inoculated with TO15c.”
e1“rapeseed (Brassica napus L.)”
Claim · model-written summary
The combined rhizobacteria and nitrogen fertilizer application had the maximum effect.
- Taxon
- rapeseede1
- Treatment
- rhizobacteria and nitrogen fertilizer combined applicatione0
- Interactor
- Bacillus sp. strain TO15ce2symbiont
- Outcome
- maximum effecte0
- Direction
- maximume0
Not reportedComparator
Verbatim
e0“The maximum effect was achieved with the rhizobacteria and nitrogen fertilizer combined application.”
e1“rapeseed (Brassica napus L.)”
e2“Bacillus sp. strain TO15c”
Claim · model-written summary
Bacillus TO15c effectiveness on rapeseed increased with nitrogen fertilizer.
Verbatim
e0“The effectiveness of Bacillus sp. TO15c on rapeseed increased in the presence of nitrogen fertilizer, despite the fact that these PGPR were able to fix atmospheric nitrogen.”
Claim · model-written summary
The PGPR were able to fix atmospheric nitrogen.
Not reportedDirection
Verbatim
e0“these PGPR were able to fix atmospheric nitrogen.”
e1“rapeseed (Brassica napus L.)”
e2“Bacillus sp. TO15c”
The same questions in other papers
ammonium nitrate · growth · Brassica napus (oilseed rape)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
inoculation · molecular: metabolites · Brassica napus (oilseed rape)Positive and negative results
10 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
10 papers more in this group
See all 14 papers →inoculation · growth · Brassica napus (oilseed rape)Positive and negative results
60 papers in the same direction as this paper · 13 in the opposite direction
- positive
- no effect
- negative
70 papers more in this group
See all 74 papers →inoculation · physiology: photosynthesis · Brassica napus (oilseed rape)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.