Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses
C4 perennial Urochloa spp. grasses are widely planted in extensive areas in the tropics. These areas are continuously facing waterlogging events, which limits plant growth and production. However, no commercial cultivar combining excellent waterlogging tolerance with superior biomass production and...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Commonwealth Scientific and Industrial Research Organisation
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/111275 |
| _version_ | 1855523656705245184 |
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| author | Jiménez, Juan de la Cruz Cardoso, Juan Andrés Kotula, Lukasz Veneklaas, Erik Jan Pedersen, Ole Colmer, Timothy D. |
| author_browse | Cardoso, Juan Andrés Colmer, Timothy D. Jiménez, Juan de la Cruz Kotula, Lukasz Pedersen, Ole Veneklaas, Erik Jan |
| author_facet | Jiménez, Juan de la Cruz Cardoso, Juan Andrés Kotula, Lukasz Veneklaas, Erik Jan Pedersen, Ole Colmer, Timothy D. |
| author_sort | Jiménez, Juan de la Cruz |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | C4 perennial Urochloa spp. grasses are widely planted in extensive areas in the tropics. These areas are continuously facing waterlogging events, which limits plant growth and production. However, no commercial cultivar combining excellent waterlogging tolerance with superior biomass production and nutritional quality is available. The objective of this study was to identify root traits that can be used for selecting waterlogging tolerant species of Urochloa. Root respiration, root morphological, architectural and anatomical traits were evaluated in eight contrasting Urochloa spp. genotypes grown under aerated or deoxygenated stagnant solutions. Moreover, modelling of internal aeration was used to relate differences in root traits and root growth in waterlogged soils. Increased aerenchyma formation in roots, reduced stele area and development of a fully suberised exodermis are characteristics improving internal aeration of roots and therefore determining waterlogging tolerance in these C4 forage grasses. Waterlogging-tolerant genotypes had steeper root angles and greater root lengths than the waterlogging-sensitive genotypes. In stagnant conditions, waterlogging-tolerant genotypes had a greater proportion of aerenchyma and reduced stele area in root cross-sections, had deeper roots, steeper root angle and larger root biomass, which in turn, allowed for greater shoot biomass. Total root length had the strongest positive influence on shoot dry mass and can therefore be used as proxy for selecting waterlogging tolerant Urochloa genotypes. |
| format | Journal Article |
| id | CGSpace111275 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Commonwealth Scientific and Industrial Research Organisation |
| publisherStr | Commonwealth Scientific and Industrial Research Organisation |
| record_format | dspace |
| spelling | CGSpace1112752025-12-08T10:29:22Z Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses Jiménez, Juan de la Cruz Cardoso, Juan Andrés Kotula, Lukasz Veneklaas, Erik Jan Pedersen, Ole Colmer, Timothy D. abiotic stress lignins root length biopolymers waterlogging estrés abiótico ligninas biopolímeros C4 perennial Urochloa spp. grasses are widely planted in extensive areas in the tropics. These areas are continuously facing waterlogging events, which limits plant growth and production. However, no commercial cultivar combining excellent waterlogging tolerance with superior biomass production and nutritional quality is available. The objective of this study was to identify root traits that can be used for selecting waterlogging tolerant species of Urochloa. Root respiration, root morphological, architectural and anatomical traits were evaluated in eight contrasting Urochloa spp. genotypes grown under aerated or deoxygenated stagnant solutions. Moreover, modelling of internal aeration was used to relate differences in root traits and root growth in waterlogged soils. Increased aerenchyma formation in roots, reduced stele area and development of a fully suberised exodermis are characteristics improving internal aeration of roots and therefore determining waterlogging tolerance in these C4 forage grasses. Waterlogging-tolerant genotypes had steeper root angles and greater root lengths than the waterlogging-sensitive genotypes. In stagnant conditions, waterlogging-tolerant genotypes had a greater proportion of aerenchyma and reduced stele area in root cross-sections, had deeper roots, steeper root angle and larger root biomass, which in turn, allowed for greater shoot biomass. Total root length had the strongest positive influence on shoot dry mass and can therefore be used as proxy for selecting waterlogging tolerant Urochloa genotypes. 2021 2021-02-12T12:07:27Z 2021-02-12T12:07:27Z Journal Article https://hdl.handle.net/10568/111275 en Open Access application/pdf Commonwealth Scientific and Industrial Research Organisation de la Cruz Jiménez, J.; Cardoso, J.A.; Kotula, L.; Veneklaas, E.J.; Pedersen, O.; Colmer, T.D. (2020) Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses. Functional Plant Biology, Online first paper (8 December 2020). ISSN: 1445-4416 |
| spellingShingle | abiotic stress lignins root length biopolymers waterlogging estrés abiótico ligninas biopolímeros Jiménez, Juan de la Cruz Cardoso, Juan Andrés Kotula, Lukasz Veneklaas, Erik Jan Pedersen, Ole Colmer, Timothy D. Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses |
| title | Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses |
| title_full | Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses |
| title_fullStr | Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses |
| title_full_unstemmed | Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses |
| title_short | Root length is proxy for high-throughput screening of waterlogging tolerance in Urochloa spp. grasses |
| title_sort | root length is proxy for high throughput screening of waterlogging tolerance in urochloa spp grasses |
| topic | abiotic stress lignins root length biopolymers waterlogging estrés abiótico ligninas biopolímeros |
| url | https://hdl.handle.net/10568/111275 |
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