Abstract
Interactions between plant roots and nitrogen (N)-fixing microorganisms in the rhizosphere are crucial for plant growth and development. However, the contribution of rhizosphere microbial N fixation to peach tree growth and the underlying interaction mechanisms remain unclear. Our study demonstrated that peach trees under bag-controlled, precise, and stabilized low-N (BCLN) fertilization exhibited significantly increased root microbial abundance and soil N fixation. The peach rhizosphere soil showed significantly enhanced microbial α-diversity, increased abundance of N-fixing microbes, and elevated nitrogenase activity under BCLN fertilization. Further analysis indicated that BCLN fertilization induced peach roots to secrete arbutin, which mediated enrichment of the Pseudomonas strain DT33X, an N-fixing bacterium, thereby enhancing plant N-use efficiency (i.e., N accumulation relative to input). Arbutin, a component of root exudates, enhanced the growth, colonization, and N-fixation capacity of DT33X, as evidenced by an increased nifH gene copy number in soil. Together, these findings elucidate a mechanistic link between peach roots and N-fixing microbes under BCLN fertilization, demonstrating that specific root-derived signaling molecules can modulate N-fixing bacteria, thereby improving N-use efficiency in peach trees.
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Claims 10
Claim · model-written summary
BCLN fertilization increased peach root microbial abundance.
- Taxon
- peach trees
Prunus persicae0 - Treatment
- bag-controlled, precise, and stabilized low-N (BCLN) fertilizatione0
- Outcome
- root microbial abundancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees under bag-controlled, precise, and stabilized low-N (BCLN) fertilization exhibited significantly increased root microbial abundance and soil N fixation.”
Claim · model-written summary
BCLN fertilization increased soil nitrogen fixation associated with peach roots.
- Taxon
- peach treesPrunus persicae0
- Treatment
- bag-controlled, precise, and stabilized low-N (BCLN) fertilizatione0
- Outcome
- soil N fixatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees under bag-controlled, precise, and stabilized low-N (BCLN) fertilization exhibited significantly increased root microbial abundance and soil N fixation.”
Claim · model-written summary
BCLN fertilization enhanced peach rhizosphere microbial alpha diversity.
- Taxon
- peachPrunus persicae0
- Treatment
- BCLN fertilizatione0
- Outcome
- microbial α-diversitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peach rhizosphere soil showed significantly enhanced microbial α-diversity, increased abundance of N-fixing microbes, and elevated nitrogenase activity under BCLN fertilization.”
Claim · model-written summary
BCLN fertilization increased abundance of nitrogen fixing microbes in peach rhizosphere soil.
- Taxon
- peachPrunus persicae0
- Treatment
- BCLN fertilizatione0
- Outcome
- abundance of N-fixing microbese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peach rhizosphere soil showed significantly enhanced microbial α-diversity, increased abundance of N-fixing microbes, and elevated nitrogenase activity under BCLN fertilization.”
Claim · model-written summary
BCLN fertilization elevated nitrogenase activity in peach rhizosphere soil.
- Taxon
- peachPrunus persicae0
- Treatment
- BCLN fertilizatione0
- Outcome
- nitrogenase activitye0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peach rhizosphere soil showed significantly enhanced microbial α-diversity, increased abundance of N-fixing microbes, and elevated nitrogenase activity under BCLN fertilization.”
Claim · model-written summary
BCLN fertilization induced peach root arbutin secretion.
- Taxon
- peachPrunus persicae0
- Treatment
- BCLN fertilizatione0
- Outcome
- peach roots to secrete arbutine0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BCLN fertilization induced peach roots to secrete arbutin”
Claim · model-written summary
The authors attributed enrichment of Pseudomonas DT33X to peach root arbutin secretion.
- Taxon
- peachPrunus persicae0
- Interactor
- Pseudomonas strain DT33Xe0symbiont
- Compound
- arbutine0
- Outcome
- enrichment of the Pseudomonas strain DT33Xe0
- Direction
- enrichmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BCLN fertilization induced peach roots to secrete arbutin, which mediated enrichment of the Pseudomonas strain DT33X, an N-fixing bacterium”
Claim · model-written summary
The arbutin mediated interaction enhanced peach nitrogen use efficiency.
- Taxon
- peachPrunus persicae1
- Interactor
- Pseudomonas strain DT33Xe0symbiont
- Compound
- arbutine1
- Outcome
- plant N-use efficiencye0
- Direction
- enhancinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which mediated enrichment of the Pseudomonas strain DT33X, an N-fixing bacterium, thereby enhancing plant N-use efficiency (i.e., N accumulation relative to input)”
e1“BCLN fertilization induced peach roots to secrete arbutin”
Claim · model-written summary
Arbutin enhanced growth of Pseudomonas DT33X.
- Taxon
- peachPrunus persicae1
- Treatment
- Arbutine0
- Interactor
- Pseudomonas strain DT33Xe2symbiont
- Outcome
- growth, colonization, and N-fixation capacity of DT33Xe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arbutin, a component of root exudates, enhanced the growth, colonization, and N-fixation capacity of DT33X”
e1“peach roots to secrete arbutin”
e2“Pseudomonas strain DT33X”
Claim · model-written summary
Arbutin was associated with increased nifH copy number in soil.
- Taxon
- peachPrunus persicae1
- Interactor
- Pseudomonas strain DT33Xe2symbiont
- Compound
- Arbutine0
- Outcome
- nifH gene copy number in soile0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arbutin, a component of root exudates, enhanced the growth, colonization, and N-fixation capacity of DT33X, as evidenced by an increased nifH gene copy number in soil.”
e1“peach roots to secrete arbutin”
e2“Pseudomonas strain DT33X”
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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.