Abstract
BACKGROUND: Rhizosphere microorganisms can improve soil quality, promote plant growth, and enhance plant health. Despite the isolation of numerous plant growth-promoting rhizobacteria (PGPR) strains, research on how PGPR enhances walnut growth remains limited. RESULTS: In this study, the metagenomic sequencing of the rhizosphere soil in 8 major walnut-producing areas in China was conducted to identify 150 shared core amplicon sequence variants. Then, we isolated a strain of Bacillus cereus OTU8977 from the walnut rhizosphere soil and evaluated its potential plant growth-promoting functions. B. cereus OTU8977 can optimize the walnut rhizosphere microecology and promote its growth through its considerable potential in nitrogen fixation, phosphorus solubilization, and potassium dissolution. Transcriptomic analysis of walnut roots revealed that B. cereus OTU8977 promotes the growth of walnuts by enhancing phenylpropanoid biosynthesis and carbohydrate metabolic processes. CONCLUSIONS: This study identified a strain of Bacillus cereus with multiple plant growth-promoting functions, which significantly enhanced walnut growth. Moreover, the study further elucidated the mechanisms underlying its growth-promoting effects, providing a theoretical foundation for the development of walnut-specific microbial fertilizers.
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Claims 4
Claim · model-written summary
The walnut rhizosphere soil across 8 major producing areas in China shared 150 core amplicon sequence variants.
Verbatim
e1“rhizosphere soil in 8 major walnut-producing areas in China was conducted to identify 150 shared core amplicon sequence variants”
Claim · model-written summary
B. cereus OTU8977 has considerable potential for nitrogen fixation, phosphorus solubilization and potassium dissolution, promoting walnut growth.
- Taxon
- walnute2
- Interactor
- B. cereus OTU8977
Bacillus cereuse2symbiont - Outcome
- nitrogen fixation, phosphorus solubilization, and potassium dissolutione2
- Qualifier
- considerable potentiale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“B. cereus OTU8977 can optimize the walnut rhizosphere microecology and promote its growth through its considerable potential in nitrogen fixation, phosphorus solubilization, and potassium dissolution”
Claim · model-written summary
B. cereus OTU8977 enhanced phenylpropanoid biosynthesis and carbohydrate metabolic processes in walnut roots.
- Taxon
- walnute3
- Organ / stage
- rootse3
- Interactor
- B. cereus OTU8977Bacillus cereuse3symbiont
- Outcome
- phenylpropanoid biosynthesis and carbohydrate metabolic processese3
- Direction
- enhancinge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Transcriptomic analysis of walnut roots revealed that B. cereus OTU8977 promotes the growth of walnuts by enhancing phenylpropanoid biosynthesis and carbohydrate metabolic processes”
Claim · model-written summary
The Bacillus cereus strain significantly enhanced walnut growth.
Not reportedComparator
Verbatim
e4“This study identified a strain of Bacillus cereus with multiple plant growth-promoting functions, which significantly enhanced walnut growth”
The same questions in other papers
Bacillus cereus · growth · Juglans (walnuts)Positive and negative results
1 in the opposite direction
- no effect
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.