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Journal articles on the topic 'Root exudates'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Ruhi and Priyanka Upadhyay. "Abiotic Stress and Millets: The Emerging Significance of Root Exudates in Crop Resilience." PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY 26, no. 3-4 (2025): 111–25. https://doi.org/10.56557/pcbmb/2025/v26i3-49235.

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Millets, often referred to as "nutri-cereals," are gaining global recognition for their remarkable resilience to abiotic stresses such as drought, salinity, and extreme temperatures. These small-seeded cereals possess unique physiological and biochemical adaptations that enable them to survive in marginal environments. Among these mechanisms, root exudates play a crucial role in stress adaptation by modulating soil microbiota, enhancing nutrient acquisition, and mitigating oxidative damage. This review explores the composition, function, and significance of root exudates in millet stress toler

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Lei, Xue, Yuting Shen, Jianing Zhao, et al. "Root Exudates Mediate the Processes of Soil Organic Carbon Input and Efflux." Plants 12, no. 3 (2023): 630. http://dx.doi.org/10.3390/plants12030630.

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Root exudates, as an important form of material input from plants to the soil, regulate the carbon input and efflux of plant rhizosphere soil and play an important role in maintaining the carbon and nutrient balance of the whole ecosystem. Root exudates are notoriously difficult to collect due to their underlying characteristics (e.g., low concentration and fast turnover rate) and the associated methodological challenges of accurately measuring root exudates in native soils. As a result, up until now, it has been difficult to accurately quantify the soil organic carbon input from root exudates

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Qu, Peng, Butian Wang, Meijun Qi, et al. "Medicinal Plant Root Exudate Metabolites Shape the Rhizosphere Microbiota." International Journal of Molecular Sciences 25, no. 14 (2024): 7786. http://dx.doi.org/10.3390/ijms25147786.

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The interactions between plants and rhizosphere microbes mediated by plant root exudates are increasingly being investigated. The root-derived metabolites of medicinal plants are relatively diverse and have unique characteristics. However, whether medicinal plants influence their rhizosphere microbial community remains unknown. How medicinal plant species drive rhizosphere microbial community changes should be clarified. In this study involving high-throughput sequencing of rhizosphere microbes and an analysis of root exudates using a gas chromatograph coupled with a time-of-flight mass spectr

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Hussien, Ahmad M., and Muntaha Sabaa Abbas. "Effect of Allelopathic Potential of some Plants Root Exudates Concerning Growth and Pathogenicity of some Fungus on Brassica oleracea Varplant." IOP Conference Series: Earth and Environmental Science 1158, no. 7 (2023): 072006. http://dx.doi.org/10.1088/1755-1315/1158/7/072006.

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Abstract The study aims to evaluate the effectiveness of allelopathic exudates of five plant species, namely (maize, barley, Sunflower, chard, and mung bean) concerning the release of organic substances exudated from their roots and their effect on the germination and growth of brassica oleracea var plant, as well as their impact on the growth of two isolated fungi, Rhizoctona solani and Pythium ulitmum. According to the laboratory results, chard root exudates had the highest rate of Brassica oleracea var seed germination, reaching 100%, while maize plant exudates had the lowest rate, 23.33%,

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Zhang, Cheng-Sheng, Yanfen Zheng, Lijuan Peng, and Jianmin Cao. "Rootstock-Scion Interaction Affects the Composition and Pathogen Inhibitory Activity of Tobacco (Nicotiana tabacum L.) Root Exudates." Plants 9, no. 12 (2020): 1652. http://dx.doi.org/10.3390/plants9121652.

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The composition and allelopathy to Phytophthora nicotianae (the causal agent of tobacco black shank disease) of root exudates from a resistant tobacco (Nicotiana tabacum L.) cultivar Gexin 3, a susceptible cultivar Xiaohuangjin 1025 and their reciprocal grafts were investigated. Grafting with disease-resistant rootstock could improve resistance to black shank; this is closely related to the allelopathy of root exudates. The root exudates from the resistant cultivar inhibited the growth of P. nicotianae, while those from the susceptible cultivar promoted the growth; the grafting varieties had i

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Suwandi, S., T. P. Rahmadhani, S. Suparman, C. Irsan, and A. Muslim. "Allelopathic potential of root exudates from perennial herbaceous plants against Ganoderma boninense." IOP Conference Series: Earth and Environmental Science 976, no. 1 (2022): 012053. http://dx.doi.org/10.1088/1755-1315/976/1/012053.

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Abstract Allelopathic potential of root exudates from edible perennial herbaceous (Canna indica, Maranta arundinacea, and Xanthosoma sagittifolium) against mycelium of Ganoderma boninense, basal stem rot pathogen of oil palm has been studied in vitro. Root exudates were extracted from 10-day old aseptically growing plants generated from surface-sterilized corm or rhizome on water agar. Allelopathic activity was tested based on inhibition of G. boninense mycelial growth on malt extract agar supplemented with 0.1 and 1.0 μL mL−1 ethyl acetate extract of root exudates. Root exudate from X. sagitt

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Zhang, Jiale, Qianwen Liu, Kun Li, and Li Ma. "Peanut Root Exudates Suppress Fusarium solani and Modulate the Microbial Community Structure of Rhizosphere in Grape Replant Soil." Horticulturae 8, no. 10 (2022): 892. http://dx.doi.org/10.3390/horticulturae8100892.

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Replant disease significantly hinders the development of the grape industry, and the imbalance of the rhizosphere microecological environment is one of the fundamental reasons hindering grape replants. Peanut is a common intercropping crop, and whether the root exudates of peanut can alleviate grape replant obstacles is still unknown. In this study, the effects of exogenous peanut root exudates on replanting grapevine growth, and the microbial community structure of grapevine replant soils were studied. The results showed that peanut root exudates could promote the growth of replanting grapevi

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Burak, Emma, John N. Quinton, and Ian C. Dodd. "Root hairs are the most important root trait for rhizosheath formation of barley (Hordeum vulgare), maize (Zea mays) and Lotus japonicus (Gifu)." Annals of Botany 128, no. 1 (2021): 45–57. http://dx.doi.org/10.1093/aob/mcab029.

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Abstract Background and Aims Rhizosheaths are defined as the soil adhering to the root system after it is extracted from the ground. Root hairs and mucilage (root exudates) are key root traits involved in rhizosheath formation, but to better understand the mechanisms involved their relative contributions should be distinguished. Methods The ability of three species [barley (Hordeum vulgare), maize (Zea mays) and Lotus japonicus (Gifu)] to form a rhizosheath in a sandy loam soil was compared with that of their root-hairless mutants [bald root barley (brb), maize root hairless 3 (rth3) and root

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Mansour, Samira R., and John G. Torrey. "Frankia spores of strain HFPCgI4 as inoculum for seedlings of Casuarina glauca." Canadian Journal of Botany 69, no. 6 (1991): 1251–56. http://dx.doi.org/10.1139/b91-162.

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Spore suspensions of Frankia strain HFPCgI4 originally isolated from root nodules of Casuarina glauca were studied with respect to their capacity to germinate in vitro in chemically defined media and added root exudates. Spore germination in general was low and prolonged but could be increased by chemical additions to the basal medium and increased further (doubled percentages) by adding suitable dilutions of root exudates from C. glauca seedlings. Spores inoculated directly on seedling roots at 108 spores/mL caused seedling root hair deformation in C. glauca and some root nodulation (35%). Sp

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Baghestani, Ali, Claudel Lemieux, Gilles D. Leroux, Regis Baziramakenga, and Regis R. Simard. "Determination of allelochemicals in spring cereal cultivars of different competitiveness." Weed Science 47, no. 5 (1999): 498–504. http://dx.doi.org/10.1017/s0043174500092171.

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Competitive cereal cultivars are less susceptible than others to weed interference. Their characterization may provide selection criteria that can be used as guidelines to develop new, even more competitive cultivars. Root exudates are a potential means by which competitive cultivars reduce weed growth. The objectives of this study were to evaluate the effect of cereal root exudates onBrassica kaber(DC.) L. C. Wheeler growth, to isolate and characterize the allelochemical compounds released by spring cereal cultivars, and to determine if a relation exists between these allelochemicals and cult

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Hiremath, Shivanand S., Narsing Laxmi Prasanna, Sudhakar S, et al. "A Review on Role of Root Exudates in Shaping Plant-Microbe-Pathogen Interactions." Journal of Advances in Microbiology 24, no. 12 (2024): 1–17. http://dx.doi.org/10.9734/jamb/2024/v24i12868.

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Root exudates are diverse compounds secreted by plant roots that significantly influence the rhizosphere-where complex interactions among plants, microbes, and pathogens occur. These exudates include sugars, amino acids, organic acids, phenolics, and volatile organic compounds, which collectively shape the microbial community structure in the soil. By attracting beneficial microbes like rhizobia, arbuscular mycorrhizal fungi (AMF), and plant growth-promoting rhizobacteria (PGPR), root exudates enhance nutrient acquisition, promote plant growth, and improve resistance to environmental stresses.

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Drake, J. E., B. A. Darby, M. A. Giasson, M. A. Kramer, R. P. Phillips, and A. C. Finzi. "Stoichiometry constrains microbial response to root exudation- insights from a model and a field experiment in a temperate forest." Biogeosciences 10, no. 2 (2013): 821–38. http://dx.doi.org/10.5194/bg-10-821-2013.

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Abstract. Plant roots release a wide range of chemicals into soils. This process, termed root exudation, is thought to increase the activity of microbes and the exoenzymes they synthesize, leading to accelerated rates of carbon (C) mineralization and nutrient cycling in rhizosphere soils relative to bulk soils. The nitrogen (N) content of microbial biomass and exoenzymes may introduce a stoichiometric constraint on the ability of microbes to effectively utilize the root exudates, particularly if the exudates are rich in C but low in N. We combined a theoretical model of microbial activity with

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Lambert, Max R. "Clover root exudate produces male-biased sex ratios and accelerates male metamorphic timing in wood frogs." Royal Society Open Science 2, no. 12 (2015): 150433. http://dx.doi.org/10.1098/rsos.150433.

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In amphibians, abnormal metamorph sex ratios and sexual development have almost exclusively been considered in response to synthetic compounds like pesticides or pharmaceuticals. However, endocrine-active plant chemicals (i.e. phytoestrogens) are commonly found in agricultural and urban waterways hosting frog populations with deviant sexual development. Yet the effects of these compounds on amphibian development remain predominantly unexplored. Legumes, like clover, are common in agricultural fields and urban yards and exude phytoestrogen mixtures from their roots. These root exudates serve im

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Hawes, Martha, S. Patricia Stock, Yolanda Flores-Lara, Jennifer Hubbard, Mark Schmitt, and Michael McClure. "Increased penetration of host roots by nematodes after recovery from quiescence induced by root cap exudate." Nematology 7, no. 3 (2005): 321–31. http://dx.doi.org/10.1163/156854105774355527.

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AbstractFourteen of 20 plant species surveyed produced root cap exudates that induced a state of reversible quiescence in Meloidogyne incognita and Caenorhabditis elegans. Exudate from six species failed to induce quiescence in either nematode species. Root cap exudates from pea were found to trigger quiescence in populations of plant-parasitic, animal-parasitic, insect-pathogenic, and free-living nematode species. One animal parasite was resistant. Caenorhabditis elegans strains with defects in known metabolic pathways also were screened to explore the potential for using this model system to

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Andaló, Vanessa, Grazielle Furtado Moreira, and Alcides Moino Junior. "Host-seeking behavior of the Heterorhabditis amazonensis nematode in response to stimulant sources1." Pesquisa Agropecuária Tropical 47, no. 3 (2017): 265–72. http://dx.doi.org/10.1590/1983-40632016v4745395.

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ABSTRACT Several species of entomopathogenic nematodes have different host-seeking methods, and could be considered as "ambusher" or "cruiser". These differences may depend on how the nematodes detect the volatile signals used as cues for foraging. This study aimed to evaluate the locomotor response of Heterorhabditis amazonensis RSC5 to the compounds from root exudates of different plants, as well as to stimulants produced by the presence of insects or to the feeding activity of insects on plants. Arenas with agar-water substrates, containing root exudates from corn, bean, soybean, cucumber,

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Scheffknecht, Stephan, Marc St-Arnaud, Thanasan Khaosaad, Siegrid Steinkellner, and Horst Vierheilig. "An altered root exudation pattern through mycorrhization affecting microconidia germination of the highly specialized tomato pathogen Fusarium oxysporum f. sp. lycopersici (Fol) is not tomato specific but also occurs in Fol nonhost plants." Canadian Journal of Botany 85, no. 3 (2007): 347–52. http://dx.doi.org/10.1139/b07-015.

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The effect of root exudates from plants colonized or noncolonized by the arbuscular mycorrhizal fungus Glomus mosseae on microconidia germination of Fusarium oxysporum f. sp. lycopersici (Fol) was studied. Root exudates from the Fol-host tomato and root exudates from Fol nonhost plants were tested. Root exudates from all tested plants stimulated microconidia germination. Mycorrhization increased the stimulatory effect exhibited by the root exudates from the Fol host tomato and from all Fol nonhost plants, showing that similar changes occur in the root exudates of all plants after mycorrhizatio

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Li, Bai, Yu-Ying Li, Hua-Mao Wu, et al. "Root exudates drive interspecific facilitation by enhancing nodulation and N2 fixation." Proceedings of the National Academy of Sciences 113, no. 23 (2016): 6496–501. http://dx.doi.org/10.1073/pnas.1523580113.

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Plant diversity in experimental systems often enhances ecosystem productivity, but the mechanisms causing this overyielding are only partly understood. Intercropping faba beans (Vicia faba L.) and maize (Zea mays L.) result in overyielding and also, enhanced nodulation by faba beans. By using permeable and impermeable root barriers in a 2-y field experiment, we show that root–root interactions between faba bean and maize significantly increase both nodulation and symbiotic N2 fixation in intercropped faba bean. Furthermore, root exudates from maize promote faba bean nodulation, whereas root ex

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Huang, Xing-Feng, Jacqueline M. Chaparro, Kenneth F. Reardon, Ruifu Zhang, Qirong Shen, and Jorge M. Vivanco. "Rhizosphere interactions: root exudates, microbes, and microbial communities." Botany 92, no. 4 (2014): 267–75. http://dx.doi.org/10.1139/cjb-2013-0225.

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The study of the interactions between plants and their microbial communities in the rhizosphere is important for developing sustainable management practices and agricultural products such as biofertilizers and biopesticides. Plant roots release a broad variety of chemical compounds to attract and select microorganisms in the rhizosphere. In turn, these plant-associated microorganisms, via different mechanisms, influence plant health and growth. In this review, we summarize recent progress made in unraveling the interactions between plants and rhizosphere microbes through plant root exudates, f

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Wang, Zhen Hong, Hong Fang, and Mouhui Chen. "Effects of root exudates of woody species on the soil anti-erodibility in the rhizosphere in a karst region, China." PeerJ 5 (March 1, 2017): e3029. http://dx.doi.org/10.7717/peerj.3029.

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IntroductionRhizospheres, the most active interfaces between plants and soils, play a central role in the long-term maintenance of the biosphere. The anti-erodibility of soils (AES) regulated by the root exudates is crucial to the soil stability in the rhizospheres. However, scientists still debate (1) the key organic matter of the root exudates affecting the AES and (2) the interspecific variation of these root exudates.MethodsWe used an incubation of soils to test the effects of the root exudates from eight woody plant species on the change in soil aggregation and identified the organic matt

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Patchett, Aurora, and Jonathan A. Newman. "Comparison of Plant Metabolites in Root Exudates of Lolium perenne Infected with Different Strains of the Fungal Endophyte Epichloë festucae var. lolii." Journal of Fungi 7, no. 2 (2021): 148. http://dx.doi.org/10.3390/jof7020148.

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Lolium perenne infected with the fungal endophyte Epichloë festucae var. lolii have specific, endophyte strain-dependent, chemical phenotypes in their above-ground tissues. Differences in these chemical phenotypes have been largely associated with classes of fungal-derived alkaloids which protect the plant against many insect pests. However, the use of new methodologies, such as various omic techniques, has demonstrated that many other chemical changes occur in both primary and secondary metabolites. Few studies have investigated changes in plant metabolites exiting the plant in the form of ro

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Okamoto, Satoru, Azusa Kawasaki, and Yumiko Makino. "Characterization of Oligopeptides in Solanum lycopersicum Xylem Exudates." Life 12, no. 4 (2022): 592. http://dx.doi.org/10.3390/life12040592.

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The xylem is the main pathway for the transport of water and molecules from roots to shoots. To date, it has been reported that secreted oligopeptides mediate root-to-shoot signaling, and some long-distance mobile oligopeptides have been detected in xylem exudates. However, the conservation of a number of oligopeptides and the overall features of peptide fragments contained in xylem exudates are poorly understood. Here, we conducted a comprehensive analysis of small proteins and peptides in tomato (Solanum lycopersicum) xylem exudates and characterized the identified peptide fragments. We foun

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Shi, Jibo, Xiaoya Gong, Muhammad Khashi u. Rahman, Qing Tian, Xingang Zhou, and Fengzhi Wu. "Effects of wheat root exudates on bacterial communities in the rhizosphere of watermelon." Plant, Soil and Environment 67, No. 12 (2021): 721–28. http://dx.doi.org/10.17221/419/2021-pse.

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In this study, we investigated the effects of wheat root exudates on soil bacterial communities in the watermelon rhizosphere using quantitative PCR and Illumina MiSeq sequencing. The qPCR results showed that wheat root exudates significantly increased the abundance of total bacteria, Pseudomonas, Bacillus and Streptomyces spp. Illumina MiSeq sequencing results showed that wheat root exudates significantly changed the bacterial community structure and composition. These results indicated that plant root exudates play a role in plant-to-plant signalling, strongly affect the microbial community

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Carvalhais, Lilia C., Paul G. Dennis, Dayakar V. Badri, Brendan N. Kidd, Jorge M. Vivanco, and Peer M. Schenk. "Linking Jasmonic Acid Signaling, Root Exudates, and Rhizosphere Microbiomes." Molecular Plant-Microbe Interactions® 28, no. 9 (2015): 1049–58. http://dx.doi.org/10.1094/mpmi-01-15-0016-r.

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Jasmonic acid (JA) is an essential hormone in plant development and defense responses in Arabidopsis thaliana. Exogenous treatment with JA has recently been shown to alter root exudate profiles and the composition of root-associated bacterial communities. However, it is currently unknown whether disruptions of the JA in the rhizosphere affect root exudation profiles and the relative abundance of bacteria and archaea in the rhizosphere. In the present study, two Arabidopsis mutants that are disrupted in different branches of the jasmonate pathway, namely myc2 and med25, were cultivated in nutri

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Marchi, Giuliano, Luiz Roberto Guimarães Guilherme, and Andrew C. Chang. "Plant availability of trace elements in sewage sludge-treated soils: methodology¹." Revista Brasileira de Ciência do Solo 35, no. 4 (2011): 1453–60. http://dx.doi.org/10.1590/s0100-06832011000400039.

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Synthetic root exudates were formulated based on the organic acid composition of root exudates derived from the rhizosphere of aseptically grown corn plants, pH of the rhizosphere, and the background chemical matrices of the soil solutions. The synthetic root exudates, which mimic the chemical conditions of the rhizosphere environment where soil-borne metals are dissolved and absorbed by plants, were used to extract metals from sewage-sludge treated soils 16 successive times. The concentrations of Zn, Cd, Ni, Cr, and Cu of the sludge-treated soil were 71.74, 0.21, 15.90, 58.12, and 37.44 mg kg

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Shi, Yahan, Xu Zhang, Min Zhao, et al. "The Status of Research on the Root Exudates of Submerged Plants and Their Effects on Aquatic Organisms." Water 16, no. 13 (2024): 1920. http://dx.doi.org/10.3390/w16131920.

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The ecological restoration of submerged plants is one of the most widely used technologies in the remediation of eutrophic water bodies. This technology mainly removes nitrogen, phosphorus, and other nutrients in water through the absorption effects of plant roots, stems, and leaves and the biotransformation of microorganisms attached to their surfaces. Root exudates can directly affect root-attached microorganisms and other aquatic organisms, thus significantly influencing water remediation by submerged plants. At present, there are few reviews on the root exudates of submerged plants and the

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Li, Xia, Hai-Jing Hu, Jing-Yu Li, Cong Wang, Shuang-Lin Chen, and Shu-Zhen Yan. "Effects of the Endophytic Bacteria Bacillus cereus BCM2 on Tomato Root Exudates and Meloidogyne incognita Infection." Plant Disease 103, no. 7 (2019): 1551–58. http://dx.doi.org/10.1094/pdis-11-18-2016-re.

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Root-knot nematodes (Meloidogyne spp.) cause serious crop losses worldwide. The colonization of tomato roots by endophytic bacteria Bacillus cereus BCM2 can greatly reduce Meloidogyne incognita damage, and tomato roots carrying BCM2 were repellent to M. incognita second-stage juveniles (J2). Here, the effects of BCM2 colonization on the composition of tomato root exudates was evaluated and potential mechanisms for BCM2-mediated M. incognita control explored using a linked twin-pot assay and GC-MS. On water agar plates, J2 preferentially avoided filter paper treated with tomato root exudates (o

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Dundek, Peter, Ladislav Holík, Ladislav Hromádko, et al. "Action of plant root exudates in bioremediations: a review." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 59, no. 1 (2011): 303–8. http://dx.doi.org/10.11118/actaun201159010303.

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This work presents a summary of literature dealing with the use of plant root exudates in bioremediations. Bioremediation using plants (phytoremediation or rhizoremediation) and associate rhizosphere to decontaminate polluted soil is a method based on the catabolic potential of root-associated microorganisms, which are supported by the organic substrates released from roots. These substrates are called “root exudates”. Root exudates support metabolism of pollutants-decomposing microorganisms in the rhizosphere, and affect sorption / desorption of pollutants. Awareness of exudation rates is nec

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Zhao, Jin Li, Chun Quan Cheng, Xiao Yang Gu, and Bin Liu. "Effects of Root Exudates from Invasive Plant (Mirabilis jalapa) on Soil Microenviroment under Different Land-Use Types." Advanced Materials Research 998-999 (July 2014): 1419–24. http://dx.doi.org/10.4028/www.scientific.net/amr.998-999.1419.

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Mirabilis jalapa seedlings were cultured in hydroponics, root exudates (RE) were collected by concentrating the deionized water, in which the M. jalapa seedlings transferring to. Collected root exudates were subjected to the soil with winter wheat cultivation and wasteland. Soil available nutrition contents, enzyme activities and microorganism population were determined. The results showed that the root exudates of M. jalapa could significantly reduce the contents of the available K, available N and P in soil under the higher input. But higher input of M. jalapa root exudates significantly imp

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Beauchemin, Nicholas J., Teal Furnholm, Julien Lavenus, et al. "Casuarina Root Exudates Alter the Physiology, Surface Properties, and Plant Infectivity of Frankia sp. Strain CcI3." Applied and Environmental Microbiology 78, no. 2 (2011): 575–80. http://dx.doi.org/10.1128/aem.06183-11.

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ABSTRACTThe actinomycete genusFrankiaforms nitrogen-fixing symbioses with 8 different families of actinorhizal plants, representing more than 200 different species. Very little is known about the initial molecular interactions betweenFrankiaand host plants in the rhizosphere. Root exudates are important inRhizobium-legume symbiosis, especially for initiating Nod factor synthesis. We measured differences inFrankiaphysiology after exposure to host aqueous root exudates to assess their effects on actinorhizal symbioses.Casuarina cunninghamianaroot exudates were collected from plants under nitroge

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Zambelli, Alice, Fabio Francesco Nocito, and Fabrizio Araniti. "Unveiling the Multifaceted Roles of Root Exudates: Chemical Interactions, Allelopathy, and Agricultural Applications." Agronomy 15, no. 4 (2025): 845. https://doi.org/10.3390/agronomy15040845.

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Root exudates, compounds secreted by plant roots, play a crucial role in plant–soil interactions and have significant agricultural implications. These substances influence nutrient availability, plant growth, and the surrounding rhizosphere. This review examines the composition, mechanisms, and importance of root exudates, categorizing them as diffusates, secretions, and excretions, each with specific release methods and functions. It highlights the allelopathic effects of root exudates, showing how plants use them to inhibit competitors through chemical signals and nutrient changes. Case stud

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Wang, Congli, Edward P. Masler, and Stephen T. Rogers. "Responses of Heterodera glycines and Meloidogyne incognita Infective Juveniles to Root Tissues, Root Exudates, and Root Extracts from Three Plant Species." Plant Disease 102, no. 9 (2018): 1733–40. http://dx.doi.org/10.1094/pdis-09-17-1445-re.

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The infective juvenile (J2) stage of endoparasitic plant nematodes uses plant chemical signals, released from roots, to localize and infect hosts. We examined the behaviors of soybean cyst nematode (Heterodera glycines) and root-knot nematode (Meloidogyne incognita) J2 in the presence of root signals from marigold (Tagetes patula), soybean (Glycine max), and pepper (Capsicum annuum). Signals were obtained from sources commonly used in phytoparasitic nematode chemotaxis studies: root tips, root exudates, and root extracts. Root tips from each plant species attracted M. incognita but H. glycines

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Akter, Pervin, and Rabeya Begum. "Allelopathic Responses of Crop Species to Chromolaena odorata Root Exudate Extracts: A Comprehensive Study." Grassroots Journal of Natural Resources 7, no. 1 (2024): 1–20. http://dx.doi.org/10.33002/nr2581.6853.070101.

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This study investigates the allelopathic effects of root exudate extracts from Chromolaena odorata on the germination and growth of six crop species. The results reveal variable sensitivity among the species, with the control treatment consistently exhibiting superior germination percentages. Initially, some species, including Abelmoschus esculentus (okra), Solanum lycopersicum (tomato), and Cicer arietinum (chickpea), experienced a substantial decline in germination, indicating a potential inhibitory effect of the exudates, although partial recovery was observed in subsequent treatments. Phas

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Pinior, Alexandra, Urs Wyss, Yves Piché, and Horst Vierheilig. "Plants colonized by AM fungi regulate further root colonization by AM fungi through altered root exudation." Canadian Journal of Botany 77, no. 6 (1999): 891–97. http://dx.doi.org/10.1139/b99-052.

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The effect of root exudates from non-mycorrhizal and mycorrhizal cucumber (Cucumis sativus L.) plants colonized by one of three arbuscular mycorrhizal fungi (Gigaspora rosea Nicolson & Schenck, Glomus intraradices Smith & Schenck, or Glomus mosseae (Nicolson & Gerdemann) Gerd. & Trappe) on hyphal growth of Gi. rosea and G. intraradices in axenic culture and on root colonization by G. mosseae in soil was investigated. Root exudates from non-mycorrhizal cucumber plants clearly stimulated hyphal growth, whereas root exudates from all mycorrhizal cucumber plants tested showed no st

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Afzal, Muhammad Rahil, Misbah Naz, Raza Ullah, and Daolin Du. "Persistence of Root Exudates of Sorghum bicolor and Solidago canadensis: Impacts on Invasive and Native Species." Plants 13, no. 1 (2023): 58. http://dx.doi.org/10.3390/plants13010058.

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Root exudates of the invasive Solidago canadensis and the cereal crop Sorghum bicolor (L.) Moench cv. ‘Hybridsorgo’ were tested for allelopathic interactions against native and invasive plant species in a controlled environment. After the surface was sterilized, the seeds of two invasive species (Bromus sterilis and Veronica persica) and two native species (Youngia japonica and Rumex acetosa) were germinated and transplanted into the soil (1:1 mixture of coco peat and sand) that had been conditioned for one month by the cultivation of Solidago canadensis and Sorghum bicolor, both in combinatio

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Chen, Lin, and Yunpeng Liu. "The Function of Root Exudates in the Root Colonization by Beneficial Soil Rhizobacteria." Biology 13, no. 2 (2024): 95. http://dx.doi.org/10.3390/biology13020095.

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Soil-beneficial microbes in the rhizosphere play important roles in improving plant growth and health. Root exudates play key roles in plant–microbe interactions and rhizobacterial colonization. This review describes the factors influencing the dynamic interactions between root exudates and the soil microbiome in the rhizosphere, including plant genotype, plant development, and environmental abiotic and biotic factors. We also discuss the roles of specific metabolic mechanisms, regulators, and signals of beneficial soil bacteria in terms of colonization ability. We highlight the latest researc

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Feng, Haichao, Ruixin Fu, Xueqin Hou, et al. "Chemotaxis of Beneficial Rhizobacteria to Root Exudates: The First Step towards Root–Microbe Rhizosphere Interactions." International Journal of Molecular Sciences 22, no. 13 (2021): 6655. http://dx.doi.org/10.3390/ijms22136655.

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Chemotaxis, the ability of motile bacteria to direct their movement in gradients of attractants and repellents, plays an important role during the rhizosphere colonization by rhizobacteria. The rhizosphere is a unique niche for plant–microbe interactions. Root exudates are highly complex mixtures of chemoeffectors composed of hundreds of different compounds. Chemotaxis towards root exudates initiates rhizobacteria recruitment and the establishment of bacteria–root interactions. Over the last years, important progress has been made in the identification of root exudate components that play key

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Mulaa, Elvin Elizabeth, Stephen Mwangi Githiri, Tesfamichael Semere Mallu, and Damaris Achieng Odeny. "Germination response of <i>Striga hermonthica</i> ecotypes from Western Kenya upon exposure to maize root exudates." Journal of Agriculture, Science and Technology 24, no. 1 (2025): 1–17. https://doi.org/10.4314/jagst.v24i1.1.

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Striga hermonthica, commonly known as witchweed or ‘cereal killer', is a root hemiparasite of cereals, germinating only in response to host-induced molecules, strigolactones (SL). It continues to pose a serious threat to maize production in western Kenya, resulting in up to 100% crop failure. Percent germination of Striga is an important indicator of the virulence level of the parasite as it translates to high attachment to the host roots and varies based on the SL profile. However, specificity of Striga ecotypes when exposed to germination stimulants from host root exudates of differential te

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Vishnevskaya, Nadezhda, Vlada Shakhnazarova, Alexander Shaposhnikov, and Olga Strunnikova. "The Role of Root Exudates of Barley Colonized by Pseudomonas fluorescens in Enhancing Root Colonization by Fusarium culmorum." Plants 9, no. 3 (2020): 366. http://dx.doi.org/10.3390/plants9030366.

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The aim of this study was to find out why after joint inoculation of the substrate with the phytopathogenic fungus Fusarium culmorum and the antagonistic bacterium Pseudomonas fluorescens the amount of the fungus on the root surface in the beginning of the colonization was greater on the roots colonized by the bacterium than on control roots. This phenomenon is especially interesting because joint inoculation with P. fluorescens was always followed by a considerable decrease in the incidence of Fusarium root rot. In two experiments barley was grown in sterile vermiculite inoculated only with F

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Chertov, Oleg, Yakov Kuzyakov, Irina Priputina, Pavel Frolov, Vladimir Shanin, and Pavel Grabarnik. "Modelling the Rhizosphere Priming Effect in Combination with Soil Food Webs to Quantify Interaction between Living Plant, Soil Biota and Soil Organic Matter." Plants 11, no. 19 (2022): 2605. http://dx.doi.org/10.3390/plants11192605.

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A model of rhizosphere priming effect under impact of root exudate input into rhizosphere soil was developed as an important process of the plant-soil interaction. The model was based on the concept of nitrogen (N) mining, compensating for the N scarcity in exudates for microbial growth by accelerating SOM mineralisation. In the model, N deficiency for microbial growth is covered (“mined”) by the increased SOM mineralisation depending on the C:N ratio of the soil and exudates. The new aspect in the model is a food web procedure, which calculates soil fauna feeding on microorganisms, the return

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Haichar, Feth el Zahar, Catherine Santaella, Thierry Heulin, and Wafa Achouak. "Root exudates mediated interactions belowground." Soil Biology and Biochemistry 77 (October 2014): 69–80. http://dx.doi.org/10.1016/j.soilbio.2014.06.017.

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Oburger, Eva, and David L. Jones. "Sampling root exudates – Mission impossible?" Rhizosphere 6 (June 2018): 116–33. http://dx.doi.org/10.1016/j.rhisph.2018.06.004.

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Bolaños-Vásquez, Maria Cristina, and Dietrich Werner. "Effects of Rhizobium tropici, R. etli, and R. leguminosarum bv. phaseoli on nod Gene-Inducing Flavonoids in Root Exudates of Phaseolus vulgaris." Molecular Plant-Microbe Interactions® 10, no. 3 (1997): 339–46. http://dx.doi.org/10.1094/mpmi.1997.10.3.339.

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Flavonoids play an important role as signal molecules in the early stages of the legume-Rhizobium symbiosis. The flavonoid content in root exudates of individual seedlings of Phaseolus vulgaris cv. Rab39 was determined by a sensitive method that combines absorption onto cellulose acetate filter strips with separation, identification, and quantification of individual compounds by high-performance liquid chromatography/diode-array detector and gas chromatography-mass spectroscopy analyses. We identified six flavonoids, daidzein, coumestrol, naringenin, genistein, liquiritigenin, and isoliquiriti

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CELAR, Franci. "Vpliv koreninskih izločkov sejančkov različnih rastlin na rast micelija antagonističnih gliv Trichoderma spp. in Gliocladium roseum." Acta agriculturae Slovenica 79, no. 2 (2002): 343–48. http://dx.doi.org/10.14720/aas.2002.79.2.15771.

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The cabbage and onion root exudates inhibit the mycelial growth of antagonistic fungi Trichoderma spp. and Gliocladium roseum to a different degree. The inhibition is more pronounced with fast growing fungi and does not show with slow growing T. koningii. The maize root exudates stimulate the mycelial growth of antagonistic fungi with the exception of T. koningii. Nearly the same is true for the pea root exudates, which have no influence on mycelial growth of T. viride and T. koningii. The salad lettuce root exudates either exhibit a slight stimulatory effect on the mycelial growth of some ant

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Shao, Meini, Yongsheng Ma, Yaokai Wang, et al. "A Preliminary Study on Allelopathy and Potential Allelochemicals of Root Exudates from Solanum rostratum Dunal." Biotechnology Journal International, January 22, 2022, 31–39. http://dx.doi.org/10.9734/bji/2022/v26i130163.

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Aims: In order to understand the role of allelopathy in invasion success, effects of root exudates from Solanum rostratum Dunal on germination and primary growth of wheat and cabbage seeds were studied by vitro bioassay. These results indicated the allelopathy of root exudates and would be helpful for understanding Solanum rostratum Dunal invasion.  Study Design: The roots were washed clean for three times with distilled water before they were gathered in a big bucket. The container was filled with distilled water, enough to submerge the roots, and air was aerated constantly with an air

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McLaughlin, Sarah, Kateryna Zhalnina, Suzanne Kosina, Trent R. Northen, and Joelle Sasse. "The core metabolome and root exudation dynamics of three phylogenetically distinct plant species." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-37164-x.

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AbstractRoot exudates are plant-derived, exported metabolites likely shaping root-associated microbiomes by acting as nutrients and signals. However, root exudation dynamics are unclear and thus also, if changes in exudation are reflected in changes in microbiome structure. Here, we assess commonalities and differences between exudates of different plant species, diurnal exudation dynamics, as well as the accompanying methodological aspects of exudate sampling. We find that exudates should be collected for hours rather than days as many metabolite abundances saturate over time. Plant growth in

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Jing, Hang, Huiling Wang, Guoliang Wang, Guobin Liu, and Yi Cheng. "The mechanism effects of root exudate on microbial community of rhizosphere soil of tree, shrub, and grass in forest ecosystem under N deposition." ISME Communications 3, no. 1 (2023). http://dx.doi.org/10.1038/s43705-023-00322-9.

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AbstractForests are composed of various plant species, and rhizosphere soil microbes are driven by root exudates. However, the interplay between root exudates, microbial communities in the rhizosphere soil of canopy trees, understory shrubs, grasses, and their responses to nitrogen (N) deposition remains unclear. Pinus tabulaeformis, Rosa xanthina, and Carex lancifolia were used to investigate root exudates, rhizosphere soil microbial communities, and their responses to N application in forest ecosystem. Root exudate abundances of P. tabulaeformis were significantly higher than that of R. xant

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Yang, Han, Peipei Zhang, Qitong Wang, et al. "Shifts in root exudate composition coordinate with root resource conservation along an elevation gradient." Journal of Ecology, May 15, 2025. https://doi.org/10.1111/1365-2745.70064.

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Abstract Root exudates contain a diverse array of compounds, playing pivotal roles in plant below‐ground resource acquisition and stress resistance. Yet, it remains unclear whether and how root exudate composition coordinates with root traits and contributes to plant below‐ground resource acquisition strategies under changing environments. Here, we collected root exudates from a coniferous species (Abies georgei Orr) along an elevation gradient and employed a cheminformatics tool to distil metabolic traits of exudate composition to explore their coordination with root resource acquisition stra

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Feng, Yali, Yue Kang, Zhibo Wang, et al. "Ralstonia solanacearum infection induces tobacco root to secrete chemoattractants to recruit antagonistic bacteria and defensive compounds to inhibit pathogen." Pest Management Science, December 13, 2024. https://doi.org/10.1002/ps.8581.

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AbstractBACKGROUNDPlant root exudates play crucial roles in maintaining the structure and function of the whole belowground ecosystem and regulating the interactions between roots and soil microorganisms. Ralstonia solanacearum causes bacterial wilt disease in many plants, while root exudate‐mediated inhibition of pathogen infection is poorly understood. Here, we characterize the chemical divergence between root exudates of healthy and diseased tobacco plants and the effects of that variability on the rhizosphere microbial community and the occurrence of bacterial wilt.RESULTSCompared with the

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Goyal, Ravinder K., Joseph P. M. Hui, Jeffery Ranches, et al. "Untargeted metabolomic analysis reveals a potential role of saponins in the partial resistance of pea (Pisum sativum) against a root rot pathogen, Aphanomyces euteiches." Phytopathology®, August 26, 2024. http://dx.doi.org/10.1094/phyto-04-24-0151-r.

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In soil-borne diseases, the plant-pathogen interaction begins as soon as the seed germinates and develops into a seedling. Aphanomyces euteiches, an oomycete, stays dormant in soil and gets activated by sensing the host through chemical signals present in the root exudates. The composition of plant exudates may, thus, play an important role during the early phase of infection. To better understand the role of root exudates in plant resistance, we investigated the interaction between partially resistant lines (PI660736 and PI557500) and susceptible pea cultivars (CDC Meadow and AAC Chrome) agai

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Lopez-Guerrero, Martha G., Peng Wang, Felicia Phares, Daniel P. Schachtman, Sophie Alvarez, and Karin van Dijk. "A glass bead semi-hydroponic system for intact maize root exudate analysis and phenotyping." Plant Methods 18, no. 1 (2022). http://dx.doi.org/10.1186/s13007-022-00856-4.

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Abstract Background Although there have been numerous studies describing plant growth systems for root exudate collection, a common limitation is that these systems require disruption of the plant root system to facilitate exudate collection. Here, we present a newly designed semi-hydroponic system that uses glass beads as solid support to simulate soil impedance, which combined with drip irrigation, facilitates growth of healthy maize plants, collection and analysis of root exudates, and phenotyping of the roots with minimal growth disturbance or root damage. Results This system was used to c

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