Abstract
Root-associated microbiomes contribute to plant growth and health, and are dynamically affected by plant development and changes in the soil environment. However, how different fertilizer regimes affect quantitative changes in microbial assembly to effect plant growth remains obscure. Here, we explore the temporal dynamics of the root-associated bacteria of soybean using quantitative microbiome profiling (QMP) to examine its response to unbalanced fertilizer treatments (i.e., lacking either N, P or K) and its role in sustaining plant growth after four decades of unbalanced fertilization. We show that the root-associated bacteria exhibit strong succession during plant development, and bacterial loads largely increase at later stages, particularly for Bacteroidetes. Unbalanced fertilization has a significant effect on the assembly of the soybean rhizosphere bacteria, and in the absence of N fertilizer the bacterial community diverges from that of fertilized plants, while lacking P fertilizer impedes the total load and turnover of rhizosphere bacteria. Importantly, a SynCom derived from the low-nitrogen-enriched cluster is capable of stimulating plant growth, corresponding with the stabilized soybean productivity in the absence of N fertilizer. These findings provide new insights in the quantitative dynamics of the root-associated microbiome and highlight a key ecological cluster with prospects for sustainable agricultural management.
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Claims 6
Claim · model-written summary
Root bacteria succeeded through development and loads rose later, particularly Bacteroidetes.
- Taxon
- soybean
Glycine maxt0 - Interactor
- BacteroidetesBacteroidotae0other
- Outcome
- root-associated bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root-associated bacteria exhibit strong succession during plant development, and bacterial loads largely increase at later stages, particularly for Bacteroidetes.”
t0“soybean”
Claim · model-written summary
Unbalanced fertilization significantly changed soybean rhizosphere bacterial assembly.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Unbalanced fertilizatione0
- Outcome
- assembly of the soybean rhizosphere bacteriae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Unbalanced fertilization has a significant effect on the assembly of the soybean rhizosphere bacteria”
Claim · model-written summary
N omission made the bacterial community diverge from fertilized plants.
- Taxon
- soybeanGlycine maxt0
- Treatment
- absence of N fertilizere0
- Outcome
- bacterial communitye0
- Comparator
- fertilized plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the absence of N fertilizer the bacterial community diverges from that of fertilized plants”
t0“soybean”
Claim · model-written summary
P omission impeded rhizosphere bacterial load and turnover.
- Taxon
- soybeanGlycine maxt0
- Treatment
- lacking P fertilizere0
- Outcome
- total load and turnover of rhizosphere bacteriae0
- Direction
- impedese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lacking P fertilizer impedes the total load and turnover of rhizosphere bacteria.”
t0“soybean”
Claim · model-written summary
A low-nitrogen-cluster SynCom stimulated plant growth.
- Taxon
- soybeanGlycine maxt0
- Treatment
- SynCome0
- Outcome
- plant growthe0
- Direction
- stimulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a SynCom derived from the low-nitrogen-enriched cluster is capable of stimulating plant growth”
t0“soybean”
Claim · model-written summary
Soybean productivity was stable without N fertilizer.
- Taxon
- soybeanGlycine maxe0
- Treatment
- absence of N fertilizere0
- Outcome
- soybean productivitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stabilized soybean productivity in the absence of N fertilizer.”
The same questions in other papers
fertilization · soil: biology · Glycine max (soybean)Positive and negative results
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