1
|
de la Fuente C, Grondin A, Sine B, Debieu M, Belin C, Hajjarpoor A, Atkinson JA, Passot S, Salson M, Orjuela J, Tranchant-Dubreuil C, Brossier JR, Steffen M, Morgado C, Dinh HN, Pandey BK, Darmau J, Champion A, Petitot AS, Barrachina C, Pratlong M, Mounier T, Nakombo-Gbassault P, Gantet P, Gangashetty P, Guedon Y, Vadez V, Reichheld JP, Bennett MJ, Kane NA, Guyomarc'h S, Wells DM, Vigouroux Y, Laplaze L. Glutaredoxin regulation of primary root growth is associated with early drought stress tolerance in pearl millet. eLife 2024; 12:RP86169. [PMID: 38294329 PMCID: PMC10945517 DOI: 10.7554/elife.86169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024] Open
Abstract
Seedling root traits impact plant establishment under challenging environments. Pearl millet is one of the most heat and drought tolerant cereal crops that provides a vital food source across the sub-Saharan Sahel region. Pearl millet's early root system features a single fast-growing primary root which we hypothesize is an adaptation to the Sahelian climate. Using crop modeling, we demonstrate that early drought stress is an important constraint in agrosystems in the Sahel where pearl millet was domesticated. Furthermore, we show that increased pearl millet primary root growth is correlated with increased early water stress tolerance in field conditions. Genetics including genome-wide association study and quantitative trait loci (QTL) approaches identify genomic regions controlling this key root trait. Combining gene expression data, re-sequencing and re-annotation of one of these genomic regions identified a glutaredoxin-encoding gene PgGRXC9 as the candidate stress resilience root growth regulator. Functional characterization of its closest Arabidopsis homolog AtROXY19 revealed a novel role for this glutaredoxin (GRX) gene clade in regulating cell elongation. In summary, our study suggests a conserved function for GRX genes in conferring root cell elongation and enhancing resilience of pearl millet to its Sahelian environment.
Collapse
Affiliation(s)
| | - Alexandre Grondin
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
- LMI LAPSEDakarSenegal
- CERAAS, ISRAThiesSenegal
| | | | - Marilyne Debieu
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | | | - Amir Hajjarpoor
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | - Jonathan A Atkinson
- School of Biosciences, University of NottinghamSutton BoningtonUnited Kingdom
| | - Sixtine Passot
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | - Marine Salson
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | - Julie Orjuela
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | | | | | - Maxime Steffen
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | | | - Hang Ngan Dinh
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | - Bipin K Pandey
- School of Biosciences, University of NottinghamSutton BoningtonUnited Kingdom
| | - Julie Darmau
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | - Antony Champion
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | | | | | | | | | | | - Pascal Gantet
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | | | - Yann Guedon
- UMR AGAP Institut, Univ Montpellier, CIRAD, INRAE, Institut AgroMontpellierFrance
| | - Vincent Vadez
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
- LMI LAPSEDakarSenegal
- CERAAS, ISRAThiesSenegal
| | | | - Malcolm J Bennett
- School of Biosciences, University of NottinghamSutton BoningtonUnited Kingdom
| | | | | | - Darren M Wells
- School of Biosciences, University of NottinghamSutton BoningtonUnited Kingdom
| | - Yves Vigouroux
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
| | - Laurent Laplaze
- DIADE, Université de Montpellier, IRD, CIRADMontpellierFrance
- LMI LAPSEDakarSenegal
| |
Collapse
|
2
|
Khoury CK, Brush S, Costich DE, Curry HA, de Haan S, Engels JMM, Guarino L, Hoban S, Mercer KL, Miller AJ, Nabhan GP, Perales HR, Richards C, Riggins C, Thormann I. Crop genetic erosion: understanding and responding to loss of crop diversity. THE NEW PHYTOLOGIST 2022; 233:84-118. [PMID: 34515358 DOI: 10.1111/nph.17733] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
Crop diversity underpins the productivity, resilience and adaptive capacity of agriculture. Loss of this diversity, termed crop genetic erosion, is therefore concerning. While alarms regarding evident declines in crop diversity have been raised for over a century, the magnitude, trajectory, drivers and significance of these losses remain insufficiently understood. We outline the various definitions, measurements, scales and sources of information on crop genetic erosion. We then provide a synthesis of evidence regarding changes in the diversity of traditional crop landraces on farms, modern crop cultivars in agriculture, crop wild relatives in their natural habitats and crop genetic resources held in conservation repositories. This evidence indicates that marked losses, but also maintenance and increases in diversity, have occurred in all these contexts, the extent depending on species, taxonomic and geographic scale, and region, as well as analytical approach. We discuss steps needed to further advance knowledge around the agricultural and societal significance, as well as conservation implications, of crop genetic erosion. Finally, we propose actions to mitigate, stem and reverse further losses of crop diversity.
Collapse
Affiliation(s)
- Colin K Khoury
- International Center for Tropical Agriculture (CIAT), Km 17, Recta Cali-Palmira, Apartado Aéreo 6713, 763537, Cali, Colombia
- Department of Biology, Saint Louis University, 1 N. Grand Blvd, St Louis, MO, 63103, USA
- San Diego Botanic Garden, 230 Quail Gardens Dr., Encinitas, CA, 92024, USA
| | - Stephen Brush
- University of California Davis, 1 Shields Ave., Davis, CA, 95616, USA
| | - Denise E Costich
- International Maize and Wheat Improvement Center (CIMMYT), Carretera México-Veracruz, Km. 45, El Batán, 56237, Texcoco, México
| | - Helen Anne Curry
- Department of History and Philosophy of Science, University of Cambridge, Free School Lane, Cambridge, CB2 3RH, UK
| | - Stef de Haan
- International Potato Center (CIP), Avenida La Molina 1895, La Molina, Apartado Postal 1558, Lima, Peru
| | | | - Luigi Guarino
- Global Crop Diversity Trust, Platz der Vereinten Nationen 7, 53113, Bonn, Germany
| | - Sean Hoban
- The Morton Arboretum, The Center for Tree Science, 4100 IL-53, Lisle, IL, 60532, USA
| | - Kristin L Mercer
- Department of Horticulture and Crop Science, The Ohio State University, Columbus, OH, 43210, USA
| | - Allison J Miller
- Department of Biology, Saint Louis University, 1 N. Grand Blvd, St Louis, MO, 63103, USA
- Donald Danforth Plant Science Center, 975 N Warson Rd, St Louis, MO, 63132, USA
| | - Gary P Nabhan
- Southwest Center and Institute of the Environment, University of Arizona, 1401 E. First St., PO Box 210185, Tucson, AZ, 85721-0185, USA
| | - Hugo R Perales
- Departamento de Agroecología, El Colegio de la Frontera Sur, San Cristóbal, Chiapas, 29290, México
| | - Chris Richards
- National Laboratory for Genetic Resources Preservation, United States Department of Agriculture, Agricultural Research Service, 1111 South Mason Street, Fort Collins, CO, 80521, USA
| | - Chance Riggins
- Department of Crop Sciences, University of Illinois, 331 Edward R. Madigan Lab, 1201 W. Gregory Dr., Urbana, IL, 61801, USA
| | - Imke Thormann
- Federal Office for Agriculture and Food (BLE), Information and Coordination Centre for Biological Diversity (IBV), Deichmanns Aue 29, 53179, Bonn, Germany
| |
Collapse
|