{"type": "FeatureCollection", "features": [{"id": "10.1007/s00425-024-04556-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:14:33Z", "type": "Journal Article", "created": "2024-10-23", "title": "Root exudation patterns of contrasting rice (Oryza sativa L.) lines in response to P limitation", "description": "Abstract Main conclusion

Rice exudation patterns changed in response to P deficiency. Higher exudation rates were associated with lower biomass production. Total carboxylate exudation rates mostly decreased under P-limiting conditions.

Abstract

Within the rhizosphere, root exudates are believed to play an important role in plant phosphorus (P) acquisition. This could be particularly beneficial in upland rice production where P is often limited. However, knowledge gaps remain on how P deficiency shapes quality and quantity of root exudation in upland rice genotypes. We therefore investigated growth, plant P uptake, and root exudation patterns of two rice genotypes differing in P efficiency in semi-hydroponics at two P levels (low P\uffe2\uff80\uff89=\uffe2\uff80\uff891\uffc2\uffa0\uffc2\uffb5M, adequate P\uffe2\uff80\uff89=\uffe2\uff80\uff89100\uffc2\uffa0\uffc2\uffb5M). Root exudates were collected hydroponically 28 and 40\uffc2\uffa0days after germination to analyze total carbon (C), carbohydrates, amino acids, phenolic compounds spectrophotometrically and carboxylates using a targeted LC\uffe2\uff80\uff93MS approach. Despite their reported role in P solubilization, we observed that carboxylate exudation rates per unit root surface area were not increased under P deficiency. In contrast, exudation rates of total C, carbohydrates, amino acids and phenolics were mostly enhanced in response to low P supply. Overall, higher exudation rates were associated with lower biomass production in the P-inefficient genotype Nerica4, whereas the larger root system with lower C investment (per unit root surface area) in root exudates of the P-efficient DJ123 allowed for better plant growth under P deficiency. Our results reveal new insights into genotype-specific resource allocation in rice under P-limiting conditions that warrant follow-up research including more genotypes.

", "keywords": ["Genotype", "Hydroponics", "carbohydrates ; phenolics ; amino acids ; carboxylates ; phosphorus", "Plant Exudates", "Rhizosphere", "Original Article", "Oryza", "Phosphorus", "Biomass", "Amino Acids", "Plant Roots", "Carbon"], "contacts": [{"organization": "Henning Schwalm, Christiana Staudinger, Mohammad-Reza Hajirezaei, Eva Mundschenk, Alireza Golestanifard, Maire Holz, Matthias Wissuwa, Eva Oburger,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s00425-024-04556-2"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Planta", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00425-024-04556-2", "name": "item", "description": "10.1007/s00425-024-04556-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00425-024-04556-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-10-23T00:00:00Z"}}, {"id": "10.1007/s11356-013-2321-6", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:14:57Z", "type": "Journal Article", "created": "2013-12-02", "title": "Interactive Effects Of Different Inorganic As And Se Species On Their Uptake And Translocation By Rice (Oryza Sativa L.) Seedlings", "description": "There is a lack of information on the interactive relationship of absorption and transformation between two inorganic arsenic (As) species and two inorganic selenium (Se) species in rice grown under hydroponic condition. Interactive effects of inorganic As (As(III)) and (As(V)) and Se (Se(IV)and Se(VI)) species on their uptake, accumulation, and translocation in rice (Oryza sativa L.) seedlings were investigated in hydroponic culture. The results clearly showed the interactive effects of inorganic As and Se on their uptake by rice. The presence of Se reduced the sum of As species in the rice shoots regardless of Se speciation. If Se is present as Se(IV), then is it is accompanied by a corresponding increase of the sum of As species, but if Se is present as Se(VI), then there is no change in the sum of As species in rice roots. These effects are observed regardless of initial As speciation. When the rice plants are exposed to Se(IV), the presence of As increases the sum of Se species in the roots, and decreases the sum of Se species in the corresponding shoots. This effect is more pronounced for As(III) than for As(V). There is no effect on Se during exposure to Se(VI). Co-existence of As also increased SeMet in rice roots.", "keywords": ["0106 biological sciences", "Oryza", "04 agricultural and veterinary sciences", "Plant Roots", "01 natural sciences", "Arsenic", "Selenium", "Hydroponics", "Seedlings", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Drug Interactions", "Environmental Pollutants", "Plant Shoots"], "contacts": [{"organization": "Yi-Zong Huang, Gui-Lan Duan, Yunxia Liu, Ying Hu, Guo-Xin Sun,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s11356-013-2321-6"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20and%20Pollution%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11356-013-2321-6", "name": "item", "description": "10.1007/s11356-013-2321-6", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11356-013-2321-6"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-12-03T00:00:00Z"}}, {"id": "10.3389/fpls.2021.670236", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:19:17Z", "type": "Journal Article", "created": "2021-06-04", "title": "Impact of Plant Growth-Promoting Rhizobacteria Inoculation and Grafting on Tolerance of Tomato to Combined Water and Nutrient Stress Assessed via Metabolomics Analysis", "description": "

In the current study, inoculation with plant growth-promoting rhizobacteria (PGPR) and grafting were tested as possible cultural practices that may enhance resilience of tomato to stress induced by combined water and nutrient shortage. The roots of tomato grown on perlite were either inoculated or not with PGPR, applying four different treatments. These were PGPR-T1, a mix of two Enterobacter sp. strains (C1.2 and C1.5); PGPR-T2, Paenibacillus sp. strain DN1.2; PGPR-T3, Enterobacter mori strain C3.1; and PGPR-T4, Lelliottia sp. strain D2.4. PGPR-treated plants were either self-grafted or grafted onto Solanum lycopersicum cv. M82 and received either full or 50% of their standard water, nitrogen, and phosphorus needs. The vegetative biomass of plants subjected to PGPR-T1 was not reduced when plants were cultivated under combined stress, while it was reduced by stress to the rest of the PGPR treatments. However, PGPR-T3 increased considerably plant biomass of non-stressed tomato plants than did all other treatments. PGPR application had no impact on fruit biomass, while grafting onto \uffe2\uff80\uff99M82\uffe2\uff80\uff99 increased fruit production than did self-grafting. Metabolomics analysis in tomato leaves revealed that combined stress affects several metabolites, most of them already described as stress-related, including trehalose, myo-inositol, and monopalmitin. PGPR inoculation with E. mori strain C3.1 affected metabolites, which are important for plant/microbe symbiosis (myo-inositol and monopalmitin). The rootstock M82 did not affect many metabolites in plant leaves, but it clearly decreased the levels of malate and D-fructose and imposed an accumulation of oleic acid. In conclusion, PGPR are capable of increasing tomato tolerance to combined stress. However, further research is required to evaluate more strains and refine protocols for their application. Metabolites that were discovered as biomarkers could be used to accelerate the screening process for traits such as stress tolerance to abiotic and/or abiotic stresses. Finally, \uffe2\uff80\uff98M82\uffe2\uff80\uff99 is a suitable rootstock for tomato, as it is capable of increasing fruit biomass production.

", "keywords": ["0106 biological sciences", "0301 basic medicine", "2. Zero hunger", "Plant culture", "hydroponics", "Plant Science", "tomato", "15. Life on land", "grafting", "metabolomics", "01 natural sciences", "6. Clean water", "SB1-1110", "water stress", "03 medical and health sciences", "PGPR", "M82", "biostimulant"]}, "links": [{"href": "https://doi.org/10.3389/fpls.2021.670236"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Frontiers%20in%20Plant%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3389/fpls.2021.670236", "name": "item", "description": "10.3389/fpls.2021.670236", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3389/fpls.2021.670236"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-06-04T00:00:00Z"}}, {"id": "10.3390/cells9092026", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:19:22Z", "type": "Journal Article", "created": "2020-09-03", "title": "Chemical Genetics Approach Identifies Abnormal Inflorescence Meristem 1 as a Putative Target of a Novel Sulfonamide That Protects Catalase2-Deficient Arabidopsis against Photorespiratory Stress", "description": "

Alterations of hydrogen peroxide (H2O2) levels have a profound impact on numerous signaling cascades orchestrating plant growth, development, and stress signaling, including programmed cell death. To expand the repertoire of known molecular mechanisms implicated in H2O2 signaling, we performed a forward chemical screen to identify small molecules that could alleviate the photorespiratory-induced cell death phenotype of Arabidopsisthaliana mutants lacking H2O2-scavenging capacity by peroxisomal catalase2. Here, we report the characterization of pakerine, an m-sulfamoyl benzamide from the sulfonamide family. Pakerine alleviates the cell death phenotype of cat2 mutants exposed to photorespiration-promoting conditions and delays dark-induced senescence in wild-type Arabidopsis leaves. By using a combination of transcriptomics, metabolomics, and affinity purification, we identified abnormal inflorescence meristem 1 (AIM1) as a putative protein target of pakerine. AIM1 is a 3-hydroxyacyl-CoA dehydrogenase involved in fatty acid \u03b2-oxidation that contributes to jasmonic acid (JA) and salicylic acid (SA) biosynthesis. Whereas intact JA biosynthesis was not required for pakerine bioactivity, our results point toward a role for \u03b2-oxidation-dependent SA production in the execution of H2O2-mediated cell death.

", "keywords": ["EXPRESSION", "0106 biological sciences", "0301 basic medicine", "photorespiration", "Cell Respiration", "Meristem", "Arabidopsis", "Cyclopentanes", "catalase2-deficient Arabidopsis", "01 natural sciences", "Article", "ACTIVATION", "catalase2-deficient Arabidopsis", "03 medical and health sciences", "HYDROGEN-PEROXIDE", "Hydroponics", "Gene Expression Regulation", " Plant", "Multienzyme Complexes", "Stress", " Physiological", "Plant Cells", "SALICYLIC-ACID BIOSYNTHESIS", "H2O2 signaling", "Medicine and Health Sciences", "abnormal inflorescence meristem 1", "LEAF SENESCENCE", "Oxylipins", "Photosynthesis", "2. Zero hunger", "QH573-671", "Cell Death", "Arabidopsis Proteins", "Gene Expression Profiling", "Biology and Life Sciences", "Computational Biology", "Hydrogen Peroxide", "ARABIDOPSIS", "MULTIFUNCTIONAL PROTEIN", "3. Good health", "PEROXISOMAL BETA-OXIDATION", "Plant Leaves", "chemical genetics", "CELL-DEATH", "PHENYLALANINE AMMONIA-LYASE", "Seeds", "Cytology", "Salicylic Acid", "H2O2 signaling", "Signal Transduction"]}, "links": [{"href": "http://www.mdpi.com/2073-4409/9/9/2026/pdf"}, {"href": "https://doi.org/10.3390/cells9092026"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Cells", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/cells9092026", "name": "item", "description": "10.3390/cells9092026", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/cells9092026"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-09-02T00:00:00Z"}}, {"id": "1854/LU-01K80YYVSXWSSZA85FYH4AZYWN", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:22:26Z", "type": "Journal Article", "created": "2025-02-08", "title": "Light and substrate composition control root exudation rates at the initial stages of soilless lettuce cultivation", "description": "ABSTRACT

Plant root exudation is an inherent metabolic process that enhances various functions of the root system like the mobilization of nutrients and interactions with surrounding microbial communities. The role and extent of root exudation in soilless crop production is poorly investigated. Here, we analyzed soilless lettuce and show that the root exudation rate declines with plant age. Furthermore, the impact of light quality and substrate was assessed by growing soilless lettuce in 100% red light (660 nm), 100% blue light (450 nm), and white light (full-light spectrum) and in 100% perlite, 100% potting soil, or mixtures of both materials. Root exudates were collected at 10, 17 and 24 days after transplanting. The total carbon root exudation rate was influenced by light conditions and substrate composition at the earliest timepoint of the culture but not at later growth stages. The total carbohydrate exudation rate was significantly higher under pure blue and red light compared to white light. The impact of light depended on the presence of perlite in the substrate. The total phenolic compound exudation rate was most strongly influenced by the substrate composition and reached the highest level in either pure potting soil or pure perlite. These findings underscore the importance of root exudation during the initial stages of development. Light and growing media influence the exudation rate at this early stage, suggesting that exudation is an adaptive process of the soilless lettuce culture.

HIGHLIGHT

At an initial stage of development, soilless lettuce exudation rates are high and modulated by light and substrate composition, whereas older plants show lower rates that are not influenced by these environmental conditions.

Alterations of hydrogen peroxide (H2O2) levels have a profound impact on numerous signaling cascades orchestrating plant growth, development, and stress signaling, including programmed cell death. To expand the repertoire of known molecular mechanisms implicated in H2O2 signaling, we performed a forward chemical screen to identify small molecules that could alleviate the photorespiratory-induced cell death phenotype of Arabidopsisthaliana mutants lacking H2O2-scavenging capacity by peroxisomal catalase2. Here, we report the characterization of pakerine, an m-sulfamoyl benzamide from the sulfonamide family. Pakerine alleviates the cell death phenotype of cat2 mutants exposed to photorespiration-promoting conditions and delays dark-induced senescence in wild-type Arabidopsis leaves. By using a combination of transcriptomics, metabolomics, and affinity purification, we identified abnormal inflorescence meristem 1 (AIM1) as a putative protein target of pakerine. AIM1 is a 3-hydroxyacyl-CoA dehydrogenase involved in fatty acid \u03b2-oxidation that contributes to jasmonic acid (JA) and salicylic acid (SA) biosynthesis. Whereas intact JA biosynthesis was not required for pakerine bioactivity, our results point toward a role for \u03b2-oxidation-dependent SA production in the execution of H2O2-mediated cell death.

", "keywords": ["EXPRESSION", "0106 biological sciences", "0301 basic medicine", "photorespiration", "Cell Respiration", "Meristem", "Arabidopsis", "Cyclopentanes", "catalase2-deficient Arabidopsis", "01 natural sciences", "Article", "ACTIVATION", "catalase2-deficient Arabidopsis", "03 medical and health sciences", "HYDROGEN-PEROXIDE", "Hydroponics", "Gene Expression Regulation", " Plant", "Multienzyme Complexes", "Stress", " Physiological", "Plant Cells", "SALICYLIC-ACID BIOSYNTHESIS", "H2O2 signaling", "Medicine and Health Sciences", "abnormal inflorescence meristem 1", "LEAF SENESCENCE", "Oxylipins", "Photosynthesis", "2. Zero hunger", "QH573-671", "Cell Death", "Arabidopsis Proteins", "Gene Expression Profiling", "Biology and Life Sciences", "Computational Biology", "Hydrogen Peroxide", "ARABIDOPSIS", "MULTIFUNCTIONAL PROTEIN", "3. Good health", "PEROXISOMAL BETA-OXIDATION", "Plant Leaves", "chemical genetics", "CELL-DEATH", "PHENYLALANINE AMMONIA-LYASE", "Seeds", "Cytology", "Salicylic Acid", "H2O2 signaling", "Signal Transduction"]}, "links": [{"href": "http://www.mdpi.com/2073-4409/9/9/2026/pdf"}, {"href": "https://doi.org/1854/LU-8674409"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Cells", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "1854/LU-8674409", "name": "item", "description": "1854/LU-8674409", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/1854/LU-8674409"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-09-02T00:00:00Z"}}, {"id": "PMC11499414", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:24:39Z", "type": "Journal Article", "created": "2024-10-23", "title": "Root exudation patterns of contrasting rice (Oryza sativa L.) lines in response to P limitation", "description": "Abstract Main conclusion

Rice exudation patterns changed in response to P deficiency. Higher exudation rates were associated with lower biomass production. Total carboxylate exudation rates mostly decreased under P-limiting conditions.

Abstract

Within the rhizosphere, root exudates are believed to play an important role in plant phosphorus (P) acquisition. This could be particularly beneficial in upland rice production where P is often limited. However, knowledge gaps remain on how P deficiency shapes quality and quantity of root exudation in upland rice genotypes. We therefore investigated growth, plant P uptake, and root exudation patterns of two rice genotypes differing in P efficiency in semi-hydroponics at two P levels (low P\uffe2\uff80\uff89=\uffe2\uff80\uff891\uffc2\uffa0\uffc2\uffb5M, adequate P\uffe2\uff80\uff89=\uffe2\uff80\uff89100\uffc2\uffa0\uffc2\uffb5M). Root exudates were collected hydroponically 28 and 40\uffc2\uffa0days after germination to analyze total carbon (C), carbohydrates, amino acids, phenolic compounds spectrophotometrically and carboxylates using a targeted LC\uffe2\uff80\uff93MS approach. Despite their reported role in P solubilization, we observed that carboxylate exudation rates per unit root surface area were not increased under P deficiency. In contrast, exudation rates of total C, carbohydrates, amino acids and phenolics were mostly enhanced in response to low P supply. Overall, higher exudation rates were associated with lower biomass production in the P-inefficient genotype Nerica4, whereas the larger root system with lower C investment (per unit root surface area) in root exudates of the P-efficient DJ123 allowed for better plant growth under P deficiency. Our results reveal new insights into genotype-specific resource allocation in rice under P-limiting conditions that warrant follow-up research including more genotypes.

", "keywords": ["Genotype", "Hydroponics", "carbohydrates ; phenolics ; amino acids ; carboxylates ; phosphorus", "Plant Exudates", "Rhizosphere", "Original Article", "Oryza", "Phosphorus", "Biomass", "Amino Acids", "Plant Roots", "Carbon"]}, "links": [{"href": "https://link.springer.com/content/pdf/10.1007/s00425-024-04556-2.pdf"}, {"href": "https://doi.org/PMC11499414"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Planta", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "PMC11499414", "name": "item", "description": "PMC11499414", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/PMC11499414"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-10-23T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Hydroponics&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Hydroponics&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Hydroponics&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Hydroponics&offset=7", "hreflang": "en-US"}], "numberMatched": 7, "numberReturned": 7, "distributedFeatures": [], "timeStamp": "2026-09-22T09:51:36.353844Z"}