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de la Fuente Cantó C, Diouf MN, Ndour PMS, Debieu M, Grondin A, Passot S, Champion A, Barrachina C, Pratlong M, Gantet P, Assigbetsé K, Kane N, Cubry P, Diedhiou AG, Heulin T, Achouak W, Vigouroux Y, Cournac L, Laplaze L. Genetic control of rhizosheath formation in pearl millet. Sci Rep 2022; 12:9205. [PMID: 35655088 PMCID: PMC9163325 DOI: 10.1038/s41598-022-13234-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 05/13/2022] [Indexed: 11/09/2022] Open
Abstract
The rhizosheath, the layer of soil that adheres strongly to roots, influences water and nutrients acquisition. Pearl millet is a cereal crop that plays a major role for food security in arid regions of sub-Saharan Africa and India. We previously showed that root-adhering soil mass is a heritable trait in pearl millet and that it correlates with changes in rhizosphere microbiota structure and functions. Here, we studied the correlation between root-adhering soil mass and root hair development, root architecture, and symbiosis with arbuscular mycorrhizal fungi and we analysed the genetic control of this trait using genome wide association (GWAS) combined with bulk segregant analysis and gene expression studies. Root-adhering soil mass was weakly correlated only to root hairs traits in pearl millet. Twelve QTLs for rhizosheath formation were identified by GWAS. Bulk segregant analysis on a biparental population validated five of these QTLs. Combining genetics with a comparison of global gene expression in the root tip of contrasted inbred lines revealed candidate genes that might control rhizosheath formation in pearl millet. Our study indicates that rhizosheath formation is under complex genetic control in pearl millet and suggests that it is mainly regulated by root exudation.
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Affiliation(s)
| | - M N Diouf
- Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France.,Laboratoire Mixte International Intensification Écologique Des Sols Cultivés en Afrique de L'Ouest (IESOL), Dakar, Senegal.,Département de Biologie Végétale, Faculté Des Sciences Et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal
| | - P M S Ndour
- Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France.,Laboratoire Mixte International Intensification Écologique Des Sols Cultivés en Afrique de L'Ouest (IESOL), Dakar, Senegal
| | - M Debieu
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France
| | - A Grondin
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France.,Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal.,CERAAS, Thiès, Senegal
| | - S Passot
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France
| | - A Champion
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France
| | | | - M Pratlong
- Montpellier GenomiX, Montpellier, France
| | - P Gantet
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France
| | - K Assigbetsé
- Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France.,Laboratoire Mixte International Intensification Écologique Des Sols Cultivés en Afrique de L'Ouest (IESOL), Dakar, Senegal
| | - N Kane
- Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal
| | - P Cubry
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France
| | - A G Diedhiou
- Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal.,Département de Biologie Végétale, Faculté Des Sciences Et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal
| | - T Heulin
- Aix Marseille Univ, CEA, CNRS, BIAM, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France
| | - W Achouak
- Aix Marseille Univ, CEA, CNRS, BIAM, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France
| | - Y Vigouroux
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France
| | - L Cournac
- Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France
| | - L Laplaze
- DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France. .,Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal.
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Guyomarc'h S, Léran S, Auzon-Cape M, Perrine-Walker F, Lucas M, Laplaze L. Early development and gravitropic response of lateral roots in Arabidopsis thaliana. Philos Trans R Soc Lond B Biol Sci 2012; 367:1509-16. [PMID: 22527393 DOI: 10.1098/rstb.2011.0231] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Root system architecture plays an important role in determining nutrient and water acquisition and is modulated by endogenous and environmental factors, resulting in considerable developmental plasticity. The orientation of primary root growth in response to gravity (gravitropism) has been studied extensively, but little is known about the behaviour of lateral roots in response to this signal. Here, we analysed the response of lateral roots to gravity and, consistently with previous observations, we showed that gravitropism was acquired slowly after emergence. Using a lateral root induction system, we studied the kinetics for the appearance of statoliths, phloem connections and auxin transporter gene expression patterns. We found that statoliths could not be detected until 1 day after emergence, whereas the gravitropic curvature of the lateral root started earlier. Auxin transporters modulate auxin distribution in primary root gravitropism. We found differences regarding PIN3 and AUX1 expression patterns between the lateral root and the primary root apices. Especially PIN3, which is involved in primary root gravitropism, was not expressed in the lateral root columella. Our work revealed new developmental transitions occurring in lateral roots after emergence, and auxin transporter expression patterns that might explain the specific response of lateral roots to gravity.
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Affiliation(s)
- S Guyomarc'h
- Université Montpellier 2, UMR DIADE, Equipe Rhizogenèse, 911 Avenue Agropolis, 34394 Montpellier cedex 5, France
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Laplaze L, Duhoux E, Franche C, Frutz T, Svistoonoff S, Bisseling T, Bogusz D, Pawlowski K. Casuarina glauca prenodule cells display the same differentiation as the corresponding nodule cells. Mol Plant Microbe Interact 2000; 13:107-112. [PMID: 10656591 DOI: 10.1094/mpmi.2000.13.1.107] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Recent phylogenetic studies have implied that all plants able to enter root nodule symbioses with nitrogen-fixing bacteria go back to a common ancestor (D.E. Soltis, P.S. Soltis, D.R. Morgan, S.M. Swensen, B.C. Mullin, J.M. Dowd, and P.G. Martin, Proc. Natl. Acad. Sci. USA, 92:2647-2651, 1995). However, nodules formed by plants from different groups are distinct in nodule organogenesis and structure. In most groups, nodule organogenesis involves the induction of cortical cell divisions. In legumes these divisions lead to the formation of a nodule primordium, while in non-legumes they lead to the formation of a so-called prenodule consisting of infected and uninfected cells. Nodule primordium formation does not involve prenodule cells, and the function of prenodules is not known. Here, we examine the differentiation of actinorhizal prenodule cells in comparison to nodule cells with regard to both symbionts. Our findings indicate that prenodules represent primitive symbiotic organs whose cell types display the same characteristics as their nodule counterparts. The results are discussed in the context of the evolution of root nodule symbioses.
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Affiliation(s)
- L Laplaze
- Physiologie Cellulaire et Moléculaire des Arbres, Laboratoire GeneTrop, IRD, Montpellier, France
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Toth IK, Bertheau Y, Hyman LJ, Laplaze L, López MM, McNicol J, Niepold F, Persson P, Salmond GP, Sletten A, van Der Wolf JM, Pérombelon MC. Evaluation of phenotypic and molecular typing techniques for determining diversity in Erwinia carotovora subspp. atroseptica. J Appl Microbiol 1999; 87:770-81. [PMID: 10594720 DOI: 10.1046/j.1365-2672.1999.00929.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A number of phenotypic and molecular fingerprinting techniques, including physiological profiling (Biolog), restriction fragment length polymorphism (RFLP), enterobacterial repetitive intergenic consensus (ERIC) and a phage typing system, were evaluated for their ability to differentiate between 60 strains of Erwinia carotovora ssp. atroseptica (Eca) from eight west European countries. These techniques were compared with other fingerprinting techniques, random amplified polymorphic DNA (RAPD) and Ouchterlony double diffusion (ODD), previously used to type this pathogen. Where possible, data were represented as dendrograms and groups/subgroups of strains identified. Simpson's index of diversity (Simpson's D) was used to compare groupings obtained with the different techniques which, with the exception of Biolog, gave values of 0.46 (RFLP), 0. 39 (ERIC), 0.83 (phage typing), 0.82 (RAPD) and 0.26 (ODD). Of the techniques tested, phage typing showed the highest level of diversity within Eca, and this technique will now form the basis of studies into the epidemiology of blackleg disease.
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Affiliation(s)
- I K Toth
- Scottish Crop Research Institute, Invergowrie, Dundee, UK.
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