Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress
In a greenhouse experiment we applied three levels of drought stress and monitored growth variables and biomass production of Jatropha curcas seedlings propagated from three seed accessions. We determined biomass allocation, allometric relationships and plant traits. Well-watered J. curcas seedlings...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2010
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| Acceso en línea: | https://hdl.handle.net/10568/20600 |
| _version_ | 1855533871170322432 |
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| author | Achten, W.M.J. Maes, W.H. Reubens, B. Mathijs, E. Singh, Virendra Pal Verchot, Louis V. Muys, B. |
| author_browse | Achten, W.M.J. Maes, W.H. Mathijs, E. Muys, B. Reubens, B. Singh, Virendra Pal Verchot, Louis V. |
| author_facet | Achten, W.M.J. Maes, W.H. Reubens, B. Mathijs, E. Singh, Virendra Pal Verchot, Louis V. Muys, B. |
| author_sort | Achten, W.M.J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | In a greenhouse experiment we applied three levels of drought stress and monitored growth variables and biomass production of Jatropha curcas seedlings propagated from three seed accessions. We determined biomass allocation, allometric relationships and plant traits. Well-watered J. curcas seedlings grew 0.81 ± 0.15 cm day-1 in length and produced 1.49 ± 0.31 g dry biomass day-1. Under medium stress (40% plant available water) the plants maintained a similar stem shape, although they grew at lower rate (stem length: 0.28 ± 0.11 cm day-1; dry biomass production: 0.64 ± 0.18 g day-1). Seedlings under extreme drought stress (no irrigation) stopped growing, started shedding leaves and showed shrinking stem diameter from the 12th day after the start of the drought treatment. The drought treatment did not influence the wood density (0.26 g cm-3). The root/shoot ratio of the wet treatment was 0.27, which is low compared to other tropical trees. Both the biomass allocation and root/shoot were significantly influenced by drought. Plants of the different accessions were uniform in biomass production and plant traits. The allometric relationship predicting total aboveground biomass (B) with the stem diameter (D) (B = 0.029 × D2.33; R2 = 0.89) fits well in universal scaling models in which the exponent is expected to converge to 2.67 at plant maturity. Based on a small validation data set from mature J. curcas individuals this hypothesis could be confirmed. A second regression model predicts the total leaf area (LA) as a function of stem diameter (LA = 2.03 × D2.41; R2 = 0.95). The estimated transpiration crop coefficient Kcb ranged from 0.51 to 0.60 for the well-watered plants. |
| format | Journal Article |
| id | CGSpace20600 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| record_format | dspace |
| spelling | CGSpace206002025-01-24T14:20:13Z Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress Achten, W.M.J. Maes, W.H. Reubens, B. Mathijs, E. Singh, Virendra Pal Verchot, Louis V. Muys, B. allometry leafy vegetables In a greenhouse experiment we applied three levels of drought stress and monitored growth variables and biomass production of Jatropha curcas seedlings propagated from three seed accessions. We determined biomass allocation, allometric relationships and plant traits. Well-watered J. curcas seedlings grew 0.81 ± 0.15 cm day-1 in length and produced 1.49 ± 0.31 g dry biomass day-1. Under medium stress (40% plant available water) the plants maintained a similar stem shape, although they grew at lower rate (stem length: 0.28 ± 0.11 cm day-1; dry biomass production: 0.64 ± 0.18 g day-1). Seedlings under extreme drought stress (no irrigation) stopped growing, started shedding leaves and showed shrinking stem diameter from the 12th day after the start of the drought treatment. The drought treatment did not influence the wood density (0.26 g cm-3). The root/shoot ratio of the wet treatment was 0.27, which is low compared to other tropical trees. Both the biomass allocation and root/shoot were significantly influenced by drought. Plants of the different accessions were uniform in biomass production and plant traits. The allometric relationship predicting total aboveground biomass (B) with the stem diameter (D) (B = 0.029 × D2.33; R2 = 0.89) fits well in universal scaling models in which the exponent is expected to converge to 2.67 at plant maturity. Based on a small validation data set from mature J. curcas individuals this hypothesis could be confirmed. A second regression model predicts the total leaf area (LA) as a function of stem diameter (LA = 2.03 × D2.41; R2 = 0.95). The estimated transpiration crop coefficient Kcb ranged from 0.51 to 0.60 for the well-watered plants. 2010 2012-06-04T09:15:00Z 2012-06-04T09:15:00Z Journal Article https://hdl.handle.net/10568/20600 en Achten, W.M.J., Maes, W.H., Reubens, B., Mathijs, E., Singh, V.P., Verchot, L.V., Muys, B. 2010. Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress . Biomass and Bioenergy 34 (5) :667-676. ISSN: 0961-9534. |
| spellingShingle | allometry leafy vegetables Achten, W.M.J. Maes, W.H. Reubens, B. Mathijs, E. Singh, Virendra Pal Verchot, Louis V. Muys, B. Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress |
| title | Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress |
| title_full | Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress |
| title_fullStr | Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress |
| title_full_unstemmed | Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress |
| title_short | Biomass production and allocation in Jatropha curcas L. seedlings under different levels of drought stress |
| title_sort | biomass production and allocation in jatropha curcas l seedlings under different levels of drought stress |
| topic | allometry leafy vegetables |
| url | https://hdl.handle.net/10568/20600 |
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