ArticlePlant physiology2004
Microbial products trigger amino acid exudation from plant roots.
Article in Plant physiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
72 citing papers in PubMed, 306 citations in OpenAlex.
- Differential proteomics of bacteria grownmSystems · 2026Article
- Exudate compositions differ between the cover crops vetch and oat.Scientific reports · 2026Article
- Microbial phenazines: biosynthesis, structural diversity, evolution, regulation, and biological significance.Microbiology and molecular biology reviews : MMBR · 2025Review
- Rhizosphere Microbiomes of Citrus Plants in Historically Undisturbed 100-Year-Old Groves Appear to Mitigate Susceptibility to Citrus Greening Disease.Microorganisms · 2025Article
- Plant miRNAs influence soil bacterial growth and amino acid uptake, restructuring community composition.ISME communications · 2025Article
- Review
- Microbial colonisation rewires the composition and content of poplar root exudates, root and shoot metabolomes.Microbiome · 2024Article
- Clubroot-Induced Changes in the Root and Rhizosphere Microbiome of Susceptible and Resistant Canola.Plants (Basel, Switzerland) · 2024Article
- Root exudation under maize/soybean intercropping system mediates the arbuscular mycorrhizal fungi diversity and improves the plant growth.Frontiers in plant science · 2024Article
- Drought stimulates root exudation of organic nitrogen in cotton (Frontiers in plant science · 2024Article
- Inhibition of broomrape germination by 2,4-diacetylphloroglucinol produced by environmental Pseudomonas.Microbial biotechnology · 2023Article
- Plant-Root Exudate Analogues Influence Activity of the 1-Aminocyclopropane-1-Carboxylate (ACC) Deaminase Gene inMicroorganisms · 2023Article
- Amino Acids in the Root Exudates of Agave lechuguilla Torr. Favor the Recruitment and Enzymatic Activity of Nutrient-Improvement Rhizobacteria.Microbial ecology · 2023Article
- The core metabolome and root exudation dynamics of three phylogenetically distinct plant species.Nature communications · 2023Article
- Evolution of manipulative microbial behaviors in the rhizosphere.Evolutionary applications · 2022Review
- Rhizobacteria Mitigate the Negative Effect of Aluminum on Pea Growth by Immobilizing the Toxicant and Modulating Root Exudation.Plants (Basel, Switzerland) · 2022Article
- Root system architecture in rice: impacts of genes, phytohormones and root microbiota.3 Biotech · 2022Review
- Arbuscular Mycorrhizal Fungi Compete Asymmetrically for Amino Acids with Native and Invasive Solidago.Microbial ecology · 2022Article
- Genetic Circuit Design in Rhizobacteria.Biodesign research · 2022Review
- Metabolomics of plant root exudates: From sample preparation to data analysis.Frontiers in plant science · 2022Review
12 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plants naturally cycle amino acids across root cell plasma membranes, and any net efflux is termed exudation. The dominant ecological view is that microorganisms and roots passively compete for amino acids in the soil solution, yet the innate capacity of roots to recover amino acids present in ecologically relevant concentrations is unknown. We find that, in the absence of culturable microorganisms, the influx rates of 16 amino acids (each supplied at 2.5 microm) exceed efflux rates by 5% to 545% in roots of alfalfa (Medicago sativa), Medicago truncatula, maize (Zea mays), and wheat (Triticum aestivum). Several microbial products, which are produced by common soil microorganisms such as Pseudomonas bacteria and Fusarium fungi, significantly enhanced the net efflux (i.e. exudation) of amino acids from roots of these four plant species. In alfalfa, treating roots with 200 microm phenazine, 2,4-diacetylphloroglucinol, or zearalenone increased total net efflux of 16 amino acids 200% to 2,600% in 3 h. Data from (15)N tests suggest that 2,4-diacetylphloroglucinol blocks amino acid uptake, whereas zearalenone enhances efflux. Thus, amino acid exudation under normal conditions is a phenomenon that probably reflects both active manipulation and passive uptake by microorganisms, as well as diffusion and adsorption to soil, all of which help overcome the innate capacity of plant roots to reabsorb amino acids. The importance of identifying potential enhancers of root exudation lies in understanding that such compounds may represent regulatory linkages between the larger soil food web and the internal carbon metabolism of the plant.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.