Articles | Volume 8, issue 1
https://doi.org/10.5194/soil-8-49-2022
https://doi.org/10.5194/soil-8-49-2022
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20 Jan 2022
Short communication | Highlight paper |  | 20 Jan 2022

Rhizodeposition efficiency of pearl millet genotypes assessed on a short growing period by carbon isotopes (δ13C and F14C)

Papa Mamadou Sitor Ndour, Christine Hatté, Wafa Achouak, Thierry Heulin, and Laurent Cournac

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Cited articles

Alami, Y., Achouak, W., Marol, C., and Heulin, T.: Rhizosphere soil aggregation and plant growth promotion of sunflowers by an exopolysaccharide-producing Rhizobium sp. strain isolated from sunflower roots, Appl. Environ. Microbiol., 66, 3393–3398, https://doi.org/10.1128/AEM.66.8.3393-3398.2000, 2000. 
Badri, D. V. and Vivanco, J. M.: Regulation and function of root exudates, Plant Cell Environ., 32, 666–681, https://doi.org/10.1111/j.1365-3040.2009.01926.x, 2009. 
Bais, H. P., Weir, T. L., Perry, L. G., Gilroy, S., and Vivanco, J. M.: The role of root exudates in rhizosphere interactions with plants and other organisms, Ann. Rev. Plant Biol., 57, 233–266, https://doi.org/10.1146/annurev.arplant.57.032905.105159, 2006. 
Baudron, F., Jaleta, M., Okitoi, O., and Tegegn, A.: Conservation agriculture in African mixed crop-livestock systems: Expanding the niche, Agr. Ecosyst. Environ., 187, 171–182, https://doi.org/10.1016/j.agee.2013.08.020, 2014. 
Bezzate, S., Aymerich, S., Chambert, R., Czarnes, S., Berge, O., and Heulin, T.: Disruption of the Paenibacillus polymyxa levansucrase gene impairs its ability to aggregate soil in the wheat rhizosphere, Environ. Microbiol., 2, 333–342, https://doi.org/10.1046/j.1462-2920.2000.00114.x, 2000. 
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Unravelling relationships between plant rhizosheath, root exudation and soil C dynamic may bring interesting perspectives in breeding for sustainable agriculture. Using four pearl millet lines with contrasting rhizosheaths, we found that δ13C and F14C of root-adhering soil differed from those of bulk and control soil, indicating C exudation in the rhizosphere. This C exudation varied according to the genotype, and conceptual modelling performed with data showed a genotypic effect on the RPE.
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