Abstract
Although interactions between plants and microbes at the plant-soil interface are known to be important for plant nutrient acquisition, relatively little is known about how root exudates contribute to nutrient exchange over the course of plant development. In this study, root exudates from slow- and fast-growing stages of Arabidopsis thaliana plants were collected, chemically analysed and then applied to a sandy nutrient-depleted soil. We then tracked the impacts of these exudates on soil bacterial communities, soil nutrients (ammonium, nitrate, available phosphorus and potassium) and plant growth. Both pools of exudates shifted bacterial community structure. GeoChip analyses revealed increases in the functional gene potential of both exudate-treated soils, with similar responses observed for slow-growing and fast-growing plant exudate treatments. The fast-growing stage root exudates induced higher nutrient mineralization and enhanced plant growth as compared to treatments with slow-growing stage exudates and the control. These results suggest that plants may adjust their exudation patterns over the course of their different growth phases to help tailor microbial recruitment to meet increased nutrient demands during periods demanding faster growth.
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Claims 4
Claim · model-written summary
Both root exudate pools shifted bacterial community structure.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Treatment
- exudatese0
- Outcome
- bacterial community structuree0
- Direction
- shiftede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both pools of exudates shifted bacterial community structure”
t0“slow- and fast-growing stages of Arabidopsis thaliana plants”
Claim · model-written summary
Both exudate-treated soils had increased functional gene potential, with similar stage responses.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- exudate-treated soilse0
- Outcome
- functional gene potentiale0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GeoChip analyses revealed increases in the functional gene potential of both exudate-treated soils, with similar responses observed for slow-growing and fast-growing plant exudate treatments”
t0“slow- and fast-growing stages of Arabidopsis thaliana plants”
Claim · model-written summary
Fast-growing stage exudates induced higher nutrient mineralization than slow-stage exudates and control.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- fast-growing stage root exudatese0
- Outcome
- nutrient mineralizatione0
- Direction
- highere0
- Comparator
- slow-growing stage exudates and the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fast-growing stage root exudates induced higher nutrient mineralization and enhanced plant growth as compared to treatments with slow-growing stage exudates and the control”
t0“slow- and fast-growing stages of Arabidopsis thaliana plants”
Claim · model-written summary
Fast-growing stage exudates enhanced plant growth relative to slow-stage exudates and control.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- fast-growing stage root exudatese0
- Outcome
- plant growthe0
- Direction
- enhancede0
- Comparator
- slow-growing stage exudates and the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fast-growing stage root exudates induced higher nutrient mineralization and enhanced plant growth as compared to treatments with slow-growing stage exudates and the control”
t0“slow- and fast-growing stages of Arabidopsis thaliana plants”
The same questions in other papers
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1 in the opposite direction
- negative
allelopathy · growth · Arabidopsis thaliana (thale cress)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- 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.