Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth
To test the hypothesis that root growth at depth is a key trait explaining some genotypic differences in drought tolerance in potato (Solanum tuberosum L.), two varieties (Horizon and Maris Piper) differing in drought tolerance were subjected to different irrigation regimes in pots in a glasshouse a...
| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Acceso en línea: | http://hdl.handle.net/20.500.11939/4381 |
| _version_ | 1855032111114747904 |
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| author | Puertolas, Jaime Ballester, Carlos Elphinstone, E. David Dodd, Ian C. |
| author_browse | Ballester, Carlos Dodd, Ian C. Elphinstone, E. David Puertolas, Jaime |
| author_facet | Puertolas, Jaime Ballester, Carlos Elphinstone, E. David Dodd, Ian C. |
| author_sort | Puertolas, Jaime |
| collection | ReDivia |
| description | To test the hypothesis that root growth at depth is a key trait explaining some genotypic differences in drought tolerance in potato (Solanum tuberosum L.), two varieties (Horizon and Maris Piper) differing in drought tolerance were subjected to different irrigation regimes in pots in a glasshouse and in the field under a polytunnel. In the glasshouse, both cultivars showed similar gas exchange, leaf water potential, leaf xylem ABA concentration and shoot biomass independently of whether plants were grown under well watered or water deficit conditions. Under well watered conditions, root growth was three-fold higher in Horizon compared with Maris Piper, 3 weeks after emergence. Water deficit reduced this difference. In the polytunnel, applying 60% or less irrigation volume compared with full irrigation significantly decreased tuber yield in Maris Piper but not in Horizon. This was coincident with the higher root density of Horizon in deep soil layers (>40 cm), where water content was stable. The results suggest that early vigorous root proliferation may be a useful selection trait for maintaining yield of potato under restricted irrigation or rainfall, because it rapidly secures access to water stored in deep soil layers. Although selecting for vigorous root growth may assist phenotyping screening for drought tolerance, these varieties may require particular environmental or cultural conditions to express root vigour, such as sufficiently deep soils or sufficient water shortly after emergence. |
| format | article |
| id | ReDivia4381 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | ReDivia43812025-04-25T14:43:00Z Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth Puertolas, Jaime Ballester, Carlos Elphinstone, E. David Dodd, Ian C. To test the hypothesis that root growth at depth is a key trait explaining some genotypic differences in drought tolerance in potato (Solanum tuberosum L.), two varieties (Horizon and Maris Piper) differing in drought tolerance were subjected to different irrigation regimes in pots in a glasshouse and in the field under a polytunnel. In the glasshouse, both cultivars showed similar gas exchange, leaf water potential, leaf xylem ABA concentration and shoot biomass independently of whether plants were grown under well watered or water deficit conditions. Under well watered conditions, root growth was three-fold higher in Horizon compared with Maris Piper, 3 weeks after emergence. Water deficit reduced this difference. In the polytunnel, applying 60% or less irrigation volume compared with full irrigation significantly decreased tuber yield in Maris Piper but not in Horizon. This was coincident with the higher root density of Horizon in deep soil layers (>40 cm), where water content was stable. The results suggest that early vigorous root proliferation may be a useful selection trait for maintaining yield of potato under restricted irrigation or rainfall, because it rapidly secures access to water stored in deep soil layers. Although selecting for vigorous root growth may assist phenotyping screening for drought tolerance, these varieties may require particular environmental or cultural conditions to express root vigour, such as sufficiently deep soils or sufficient water shortly after emergence. 2017-06-01T10:09:59Z 2017-06-01T10:09:59Z 2014 2014 article Puertolas, Jaime, BallE., C., Elphinstone, E. David, Dodd, Ian C. (2014). Two potato (Solanum tuberosum), varieties differ in drought tolerance due to differences in root growth at depth. Functional Plant Biology, 41(10-11), 1107-1118. 1445-4408 http://hdl.handle.net/20.500.11939/4381 10.1071/FP14105 en openAccess Impreso |
| spellingShingle | Puertolas, Jaime Ballester, Carlos Elphinstone, E. David Dodd, Ian C. Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth |
| title | Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth |
| title_full | Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth |
| title_fullStr | Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth |
| title_full_unstemmed | Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth |
| title_short | Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth |
| title_sort | two potato solanum tuberosum varieties differ in drought tolerance due to differences in root growth at depth |
| url | http://hdl.handle.net/20.500.11939/4381 |
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