Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized
Rice is known to be sensitive to soil water deficit and evaporative demand, with a greatest sensitivity of lowland‐adapted genotypes. We have analysed the responses of plant water relations and of leaf elongation rate (LER) to soil water status and evaporative demand in seven rice genotypes belongin...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2010
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/166034 |
| _version_ | 1855524433463083008 |
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| author | Parent, Boris Suard, Benoît Serraj, Rachid Tardieu, François |
| author_browse | Parent, Boris Serraj, Rachid Suard, Benoît Tardieu, François |
| author_facet | Parent, Boris Suard, Benoît Serraj, Rachid Tardieu, François |
| author_sort | Parent, Boris |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Rice is known to be sensitive to soil water deficit and evaporative demand, with a greatest sensitivity of lowland‐adapted genotypes. We have analysed the responses of plant water relations and of leaf elongation rate (LER) to soil water status and evaporative demand in seven rice genotypes belonging to different species, subspecies, either upland‐ or lowland‐adapted. In the considered range of soil water potential (0 to −0.6 MPa), stomatal conductance was controlled in such a way that the daytime leaf water potential was similar in well‐watered, droughted or flooded conditions (isohydric behaviour). A low sensitivity of LER to evaporative demand was observed in the same three conditions, with small differences between genotypes and lower sensitivity than in maize. The sensitivity of LER to soil water deficit was similar to that of maize. A tendency towards lower sensitivities was observed in upland than lowland genotypes but with smaller differences than expected. We conclude that leaf water status and leaf elongation of rice are not particularly sensitive to water deficit. The main origin of drought sensitivity in rice may be its poor root system, whose effect was alleviated in the study presented here by growing plants in pots whose soil was entirely colonized by roots of all genotypes. |
| format | Journal Article |
| id | CGSpace166034 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1660342026-01-05T13:39:57Z Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized Parent, Boris Suard, Benoît Serraj, Rachid Tardieu, François drought genotypes growth leaf water potential leaves plant water relations roots root systems soil soil water soil water potential stomatal resistance water deficit water potential Rice is known to be sensitive to soil water deficit and evaporative demand, with a greatest sensitivity of lowland‐adapted genotypes. We have analysed the responses of plant water relations and of leaf elongation rate (LER) to soil water status and evaporative demand in seven rice genotypes belonging to different species, subspecies, either upland‐ or lowland‐adapted. In the considered range of soil water potential (0 to −0.6 MPa), stomatal conductance was controlled in such a way that the daytime leaf water potential was similar in well‐watered, droughted or flooded conditions (isohydric behaviour). A low sensitivity of LER to evaporative demand was observed in the same three conditions, with small differences between genotypes and lower sensitivity than in maize. The sensitivity of LER to soil water deficit was similar to that of maize. A tendency towards lower sensitivities was observed in upland than lowland genotypes but with smaller differences than expected. We conclude that leaf water status and leaf elongation of rice are not particularly sensitive to water deficit. The main origin of drought sensitivity in rice may be its poor root system, whose effect was alleviated in the study presented here by growing plants in pots whose soil was entirely colonized by roots of all genotypes. 2010-08 2024-12-19T12:55:46Z 2024-12-19T12:55:46Z Journal Article https://hdl.handle.net/10568/166034 en Wiley PARENT, BORIS; SUARD, BENOÎT; SERRAJ, RACHID and TARDIEU, FRANÇOIS. 2010. Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized. Plant Cell and Environment, Volume 33 no. 8 p. 1256-1267 |
| spellingShingle | drought genotypes growth leaf water potential leaves plant water relations roots root systems soil soil water soil water potential stomatal resistance water deficit water potential Parent, Boris Suard, Benoît Serraj, Rachid Tardieu, François Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized |
| title | Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized |
| title_full | Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized |
| title_fullStr | Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized |
| title_full_unstemmed | Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized |
| title_short | Rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized |
| title_sort | rice leaf growth and water potential are resilient to evaporative demand and soil water deficit once the effects of root system are neutralized |
| topic | drought genotypes growth leaf water potential leaves plant water relations roots root systems soil soil water soil water potential stomatal resistance water deficit water potential |
| url | https://hdl.handle.net/10568/166034 |
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