Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice
A field study was conducted to determine the response of the rice cultivar IR54 to a gradient of soil moisture conditions imposed for 19 days at the vegetative stage using a line source sprinkler system. A mild plant water stress at the vegetative growth stage decreased tiller number, leaf area inde...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Commonwealth Scientific and Industrial Research Organisation
1986
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/167767 |
| _version_ | 1855513493134901248 |
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| author | Cruz, R.T. O'Toole, J.C. Dingkuhn, M. Yambao, E.B. Thangaraj, M. De Datta, S.K. |
| author_browse | Cruz, R.T. De Datta, S.K. Dingkuhn, M. O'Toole, J.C. Thangaraj, M. Yambao, E.B. |
| author_facet | Cruz, R.T. O'Toole, J.C. Dingkuhn, M. Yambao, E.B. Thangaraj, M. De Datta, S.K. |
| author_sort | Cruz, R.T. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A field study was conducted to determine the response of the rice cultivar IR54 to a gradient of soil moisture conditions imposed for 19 days at the vegetative stage using a line source sprinkler system. A mild plant water stress at the vegetative growth stage decreased tiller number, leaf area index (LAI), apparent canopy photosynthetic rates, leaf nitrogen per unit land area, shoot and total root dry mass, and total root length density. After complete stress relief by reflooding, LAI and crop growth remained below that of unstressed plants. The lower cumulative assimilation per unit land area in the stressed treatments resulted in reduced shoot and root dry matter yields and lower grain yields. Water stress increased the ratio of shoot dry mass to root dry mass, and the ratio of leaf area to total root length. The decrease in root length was attributed to increased soil mechanical impedance. |
| format | Journal Article |
| id | CGSpace167767 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1986 |
| publishDateRange | 1986 |
| publishDateSort | 1986 |
| publisher | Commonwealth Scientific and Industrial Research Organisation |
| publisherStr | Commonwealth Scientific and Industrial Research Organisation |
| record_format | dspace |
| spelling | CGSpace1677672025-12-08T10:29:22Z Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice Cruz, R.T. O'Toole, J.C. Dingkuhn, M. Yambao, E.B. Thangaraj, M. De Datta, S.K. root response water deficits rainfed lowland rice shoot response A field study was conducted to determine the response of the rice cultivar IR54 to a gradient of soil moisture conditions imposed for 19 days at the vegetative stage using a line source sprinkler system. A mild plant water stress at the vegetative growth stage decreased tiller number, leaf area index (LAI), apparent canopy photosynthetic rates, leaf nitrogen per unit land area, shoot and total root dry mass, and total root length density. After complete stress relief by reflooding, LAI and crop growth remained below that of unstressed plants. The lower cumulative assimilation per unit land area in the stressed treatments resulted in reduced shoot and root dry matter yields and lower grain yields. Water stress increased the ratio of shoot dry mass to root dry mass, and the ratio of leaf area to total root length. The decrease in root length was attributed to increased soil mechanical impedance. 1986 2024-12-19T12:57:41Z 2024-12-19T12:57:41Z Journal Article https://hdl.handle.net/10568/167767 en Commonwealth Scientific and Industrial Research Organisation Cruz, RT; O'Toole, JC; Dingkuhn, M; Yambao, EB; Thangaraj, M and De Datta, SK. 1986. Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice. Functional Plant Biol., Volume 13 no. 4 p. 567 |
| spellingShingle | root response water deficits rainfed lowland rice shoot response Cruz, R.T. O'Toole, J.C. Dingkuhn, M. Yambao, E.B. Thangaraj, M. De Datta, S.K. Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice |
| title | Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice |
| title_full | Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice |
| title_fullStr | Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice |
| title_full_unstemmed | Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice |
| title_short | Shoot and Root Responses to Water Deficits in Rainfed Lowland Rice |
| title_sort | shoot and root responses to water deficits in rainfed lowland rice |
| topic | root response water deficits rainfed lowland rice shoot response |
| url | https://hdl.handle.net/10568/167767 |
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