Species phylogeny, ecology, and root traits as predictors of root exudate composition

Rathore, Nikita; Hanzelková, Věra; Dostálek, Tomáš; Semerád, Jaroslav; Schnablová, Renáta; Cajthaml, Tomáš; Münzbergová, Zuzana

doi:10.1111/nph.19060

Cited by 20 publications

(7 citation statements)

References 93 publications

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“…To enhance plant uptake of Ca, P, and As, P. vittata often modify their rhizosphere via root exudates to enhance nutrient and As availability. , For example, compared to the no-As control, the available Ca content was 8% greater in the As treatment (Figures S2A and S2B), which was further increased by 5% in the As+PR treatment (1.6 vs 1.7 g kg –1 ). Given that Ca uptake in P. vittata was concentration-dependent, greater Ca uptake was positively correlated to its availability in P. vittata rhizosphere (Figure S1; r = 0.73–0.88).…”

Section: Resultsmentioning

confidence: 99%

Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Deng,

Guan,

Cao

et al. 2024

Environ. Sci. Technol.

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Sparingly-soluble phosphate rock (PR), a raw material for P-fertilizer production, can be effectively utilized by the As-hyperaccumulator Pteris vittata but not most plants. In this study, we investigated the associated mechanisms by measuring dissolved organic carbon (DOC) and acid phosphatase in the rhizosphere, and nutrient uptake and gene expression related to the As metabolism in P. vittata. The plants were grown in a soil containing 200 mg kg −1 As and/or 1.5% PR for 30 days. Compared to the As treatment, the P. vittata biomass was increased by 33% to 4.6 g plant −1 in the As+PR treatment, corresponding to 27% decrease in its frond oxidative stress as measured by malondialdehyde. Due to PR-enhanced DOC production in the rhizosphere, the Ca, P, and As contents in P. vittata fronds were increased by 17% to 9.7 g kg −1 , 29% to 5.0 g kg −1 , and 57% to 1045 mg kg −1 in the As+PR treatment, thereby supporting its better growth. Besides, PR-induced rhizosphere pH increase from 5.0 to 6.9 promoted greater P uptake by P. vittata probably via upregulating low-affinity P transporters PvPTB1;1/1;2 by 3.7−4.1 folds. Consequently, 29% lower available-P induced the 3.3-fold upregulation of high-affinity P transporter PvPht1;3 in the As+PR treatment, which was probably responsible for the 58% decrease in available-As content in the rhizosphere. Consistent with the enhanced As translocation and sequestration, arsenite antiporters PvACR3/3;3 were upregulated by 1.8−4.4 folds in the As+PR than As treatment. In short, sparingly-soluble PR enhanced the Ca, P, and As availability in P. vittata rhizosphere and improved their uptake via upregulating genes related to As metabolism, suggesting its potential application for improving phytoremediation in As-contaminated soils.

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Section: Resultsmentioning

confidence: 99%

Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Deng,

Guan,

Cao

et al. 2024

Environ. Sci. Technol.

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“…Relying on such an independent experiment in sterilized sand was mainly motivated by our intent to eliminate any effect of soil microbiota and adsorption to soil particles on exudate composition (Oburger & Jones, 2018; Rathore et al., 2023). An undamaging extraction of the complete root system is also much easier in sand.…”

Section: Methodsmentioning

confidence: 99%

“…The sand from unplanted control pots was similarly processed. These filtrates were used to determine exudate composition, as well as the amount of exuded phenols, as done by Rathore et al (2023). They were stored at −20°C until further processing.…”

Section: Plant Functional Traitsmentioning

confidence: 99%

Between‐ versus within‐species variation in plant–soil feedback relates to different functional traits, but exudate variability is involved at both scales

Yacine,

Kuťáková,

in ‘t Zandt

et al. 2024

Functional Ecology

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Plant–soil feedback—feedback from plant‐induced changes in soil properties to plant fitness—is increasingly shown to drive the maintenance of local plant diversity at both interspecific and intraspecific levels. A robust understanding of the relationships between plant–soil feedback and functional plant traits, which would improve our ability to generalize plant–soil feedback results beyond specific study systems, is, however, still lacking. This is especially true at the intraspecific plant level. We assessed the relationship between plant–soil feedback and several functional traits in 13 co‐occurring grassland species, including 20 genotypes of the dominant grass, Festuca rubra. The traits encompassed various aspects of growth, root properties and root exudate variability. Combining these traits into principal gradients of functional trait variation, we also tested the potential for the conservation and collaboration gradients to explain variation in PSF. Between‐species plant–soil feedback variation was explained by differences in biomass production and exudate composition, as well as contrasting strategies along the collaboration gradient. Within‐species plant–soil feedback variation—that is between Festuca rubra genotypes—was associated with exudate variability, especially contrasting amounts of exuded phenols. Several traits had a significant effect on plant–soil feedback only via their interaction with exudate composition. Overall, PSF was associated with different traits at between‐species versus within‐species levels. Root exudate variability was, however, involved at both diversity levels. Our results put forth the role of root exudation patterns as an important driver of variation in plant–soil feedback. Better integration between research on plant–soil feedback and on root exudation would therefore improve our understanding of the processes—both ecological and evolutionary—supporting the maintenance of plant diversity within grassland communities. Read the free Plain Language Summary for this article on the Journal blog.

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“…Individual plants impact the soil habitat in species-specific manner through several pathways, including differences in root architecture and surface properties [ 6 , 7 ], litter characteristics [ 8 ], and exudation patterns [ 9 – 11 ]. Indeed, plants have been repeatedly shown to leave species-specific imprints in the structure of soil microbial communities [ 12 – 16 ].…”

Section: Introductionmentioning

confidence: 99%

Plant effects on microbiome composition are constrained by environmental conditions in a successional grassland

Mészárošová,

Kuťáková,

Kohout

et al. 2024

Environmental Microbiome

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Background Below-ground microbes mediate key ecosystem processes and play a vital role in plant nutrition and health. Understanding the composition of the belowground microbiome is therefore important for maintaining ecosystem stability. The structure of the belowground microbiome is largely determined by individual plants, but it is not clear how far their influence extends and, conversely, what the influence of other plants growing nearby is. Results To determine the extent to which a focal host plant influences its soil and root microbiome when growing in a diverse community, we sampled the belowground bacterial and fungal communities of three plant species across a primary successional grassland sequence. The magnitude of the host effect on its belowground microbiome varied among microbial groups, soil and root habitats, and successional stages characterized by different levels of diversity of plant neighbours. Soil microbial communities were most strongly structured by sampling site and showed significant spatial patterns that were partially driven by soil chemistry. The influence of focal plant on soil microbiome was low but tended to increase with succession and increasing plant diversity. In contrast, root communities, particularly bacterial, were strongly structured by the focal plant species. Importantly, we also detected a significant effect of neighbouring plant community composition on bacteria and fungi associating with roots of the focal plants. The host influence on root microbiome varied across the successional grassland sequence and was highest in the most diverse site. Conclusions Our results show that in a species rich natural grassland, focal plant influence on the belowground microbiome depends on environmental context and is modulated by surrounding plant community. The influence of plant neighbours is particularly pronounced in root communities which may have multiple consequences for plant community productivity and stability, stressing the importance of plant diversity for ecosystem functioning.

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Species phylogeny, ecology, and root traits as predictors of root exudate composition

Cited by 20 publications

References 93 publications

Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Between‐ versus within‐species variation in plant–soil feedback relates to different functional traits, but exudate variability is involved at both scales

Plant effects on microbiome composition are constrained by environmental conditions in a successional grassland

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