Regulation and function of root exudates.

By D. Badri, Jorge M. Vivanco. Plant, Cell and Environment, 2008

1,930 citations recorded by the source corpus.

Root-secreted chemicals mediate multi-partite interactions in the rhizosphere, where plant roots continually respond to and alter their immediate environment. Increasing evidence suggests that root exudates initiate and modulate dialogue between roots and soil microbes. For example, root exudates serve as signals that initiate symbiosis with rhizobia and mycorrhizal fungi. In addition, root exudates maintain and support a highly specific diversity of microbes in the rhizosphere of a given particular plant species, thus suggesting a close evolutionary link. In this review, we focus mainly on compiling the information available on the regulation and mechanisms of root exudation processes, and provide some ideas related to the evolutionary role of root exudates in shaping soil microbial communities.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/757a6cd9d11a1aac79b33ce9c3eb52db9f4b9ef4

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In Plant Science

1. Q. Shen
2. G. Berg
3. J. Chaparro
4. Jorge M. Vivanco
5. Y. Kuzyakov
6. N. Ling
7. L. Passaglia
8. B. R. Glick

Citations in the corpus

• Paenibacillus polymyxa SQR-21 systemically affects root exudates of watermelon to decrease the conidial germination of Fusarium oxysporum f.sp. niveum (2011, background): “Therefore, it was reasonable to speculate that if plants sensed and responded to the presence of a given neighbouring microbe by altering the secretion of roots for a particular purpose (Badri and Vivanco 2009).”
• Rhizospheric organic compounds in the soil–microorganism–plant system: their role in iron availability (2014, background): “The exocytosis of compounds via a subcellular vesicle transport system is often proposed in response to stress or for the release of mucilage from the root cap, but clear evidence confirming the presence of vesicular root exudation is still missing (see Badri & Vivanco, 2009).”
• The role of abiotic factors modulating the plant-microbe-soil interactions: toward sustainable agriculture. A review (2017, background): “The interaction between the root exudates and rhizosphere microbiome is the result of a long co-evolutionary process (Badri & Vivanco, 2009).”
• Salt-tolerant rhizobacteria-mediated induced tolerance in wheat (Triticum aestivum) and chemical diversity in rhizosphere enhance plant growth (2011, background): “An interesting modification caused by bacterial inoculation in the plant is the changes in the composition of root exudates, particularly that of small molecules (Bais et al. 2004; Badri and Vivanco 2009).”
• Culture-independent molecular tools for soil and rhizosphere microbiology (2013, background): “Recent studies have revealed that plants are able to shape their rhizosphere microbiome [12,19,20].”
• Rhizosphere microbiome assemblage is affected by plant development (2013, background): “…of three zones: the endorhizosphere (root tissue area), the rhizoplane (root surface with epidermis) and the ectorhizosphere (soil directly surrounding the root), and we did not distinguish between these zones (Lynch, 1990; Morgan et al., 2005; Brimecombe et al., 2007; Badri and Vivanco, 2009).”
• Stability and dynamics of enzyme activity patterns in the rice rhizosphere: Effects of plant growth and temperature (2017, background): “On average, plants release 20% of photosynthesized carbon (C) through their roots in the form of high- and low-molecular weight organic compounds (Badri and Vivanco, 2009; Fischer et al., 2010; Hinsinger et al., 2006).”
• Plant Growth-Promoting Bacteria: Mechanisms and Applications (2012, background): “[15] D.”
• Plant Growth-Promoting Rhizobacteria: Context, Mechanisms of Action, and Roadmap to Commercialization of Biostimulants for Sustainable Agriculture (2018, background): “Root exudation is genetically regulated and can thus shape distinct rhizobacterial communities for different plant genotypes, resulting in highly variable exudates among plant species, individual plant types within the same species, at different plant developmental stages, growth conditions, and bio”
• The Effect of Tillage System and Crop Rotation on Soil Microbial Diversity and Composition in a Subtropical Acrisol (2012, background): “Besides crops and C:N ratio, root exudates are also key factors that influence microbial communities, as they provide a carbon source to soil microorganisms [22,23].”