@incollection{fdi:010088423, title = {{U}sing root-soil interactions in the rhizosphere as valuable traits for selection against drought}, author = {{N}dour, {P}.{M}.{S}. and {A}chouak, {W}. and {H}eulin, {T}. and {L}aplaze, {L}aurent and {C}ournac, {L}aurent}, editor = {}, language = {{ENG}}, abstract = {{T}he rhizosphere, meaning the soil volume influenced by the living roots, hosts several important ecological processes implicating the soil, the root system and active microbiota. {T}hese various interactions often impact soil carbon ({C}) content and nutrient dynamics, as well as soil water retention, by modifying its biological and physico-chemical properties. {W}ell-known root adaptive traits for drought tolerance include deep rooting and increased root development, both of which ensure better exploration of the soil volume required for greater water uptake. {H}owever, the intensity of root-soil-microbiota interactions shape the size of the rhizosheath (i.e., the soil mass that remains attached to roots after plant excavation), which could modulate the water retention capacity of soil. {I}ndeed, genotypes with larger rhizosheath respond better to drought stress than those with a smaller rhizosheath in several plant species. {F}rom a breeding perspective, intra-specific variation in rhizosheath size has recently been demonstrated in two important crops in {W}est {A}frica: pearl millet and maize. {T}herefore, genotypes with large rhizosheath could be considered for varietal selection for adaptation to drought. {O}ngoing genome wide association studies ({GWAS}) should confirm genetic control of rhizosheath size and map candidate genes and investigations should be performed on the mechanisms that support this genetically complex trait.}, keywords = {{AFRIQUE} {DE} {L}'{OUEST}}, booktitle = {{C}rop adaptation and improvement for drought-prone environments}, numero = {}, pages = {283--304}, address = {{M}anhattan}, publisher = {{N}ew {P}rairie {P}ress}, series = {}, year = {2022}, ISBN = {978-1-944548-47-6}, URL = {https://www.documentation.ird.fr/hor/fdi:010088423}, }