Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference
The growth of spiny amaranth and longfruited primrose-willow was studied by growing them alone and in competition with 4 and 12 rice (cv. RC222) plants. Interference with 12 rice plants reduced the height of spiny amaranth beyond 6 wk after planting. The height of longfruited primrose-willow was sig...
| Autores principales: | , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Cambridge University Press
2012
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/165132 |
| _version_ | 1855529197930283008 |
|---|---|
| author | Chauhan, Bhagirath Singh Abugho, Seth Bernard |
| author_browse | Abugho, Seth Bernard Chauhan, Bhagirath Singh |
| author_facet | Chauhan, Bhagirath Singh Abugho, Seth Bernard |
| author_sort | Chauhan, Bhagirath Singh |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The growth of spiny amaranth and longfruited primrose-willow was studied by growing them alone and in competition with 4 and 12 rice (cv. RC222) plants. Interference with 12 rice plants reduced the height of spiny amaranth beyond 6 wk after planting. The height of longfruited primrose-willow was significantly reduced by the crop interference starting from 4 wk after planting. Both weed species showed the ability to reduce the effects of rice interference by increasing leaf area, leaf and stem biomass in the upper half of the plant, and specific stem length. At 9 wk after planting, for example, longfruited primrose-willow had 89 and 99% leaf biomass in the upper half of the plant when grown with 4 and 12 rice plants compared with only 34% when grown alone. These values for spiny amaranth were 15, 29, and 72% when grown alone, with 4 rice plants, and 12 rice plants, respectively. Despite such plasticity, spiny amaranth's aboveground biomass at final harvest was reduced by 34 and 70% when grown with 4 and 12 rice plants, respectively, compared with its biomass without crop interference. The corresponding values for longfruited primrose-willow were 92 and 98%, respectively. These results suggest that uniform and high crop density could be an important tool to reduce competition from these weeds in direct-seeded rice. |
| format | Journal Article |
| id | CGSpace165132 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace1651322024-12-19T14:12:52Z Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference Chauhan, Bhagirath Singh Abugho, Seth Bernard amaranthus spinosus biomass growth leaf area phenotypes weeds The growth of spiny amaranth and longfruited primrose-willow was studied by growing them alone and in competition with 4 and 12 rice (cv. RC222) plants. Interference with 12 rice plants reduced the height of spiny amaranth beyond 6 wk after planting. The height of longfruited primrose-willow was significantly reduced by the crop interference starting from 4 wk after planting. Both weed species showed the ability to reduce the effects of rice interference by increasing leaf area, leaf and stem biomass in the upper half of the plant, and specific stem length. At 9 wk after planting, for example, longfruited primrose-willow had 89 and 99% leaf biomass in the upper half of the plant when grown with 4 and 12 rice plants compared with only 34% when grown alone. These values for spiny amaranth were 15, 29, and 72% when grown alone, with 4 rice plants, and 12 rice plants, respectively. Despite such plasticity, spiny amaranth's aboveground biomass at final harvest was reduced by 34 and 70% when grown with 4 and 12 rice plants, respectively, compared with its biomass without crop interference. The corresponding values for longfruited primrose-willow were 92 and 98%, respectively. These results suggest that uniform and high crop density could be an important tool to reduce competition from these weeds in direct-seeded rice. 2012-09 2024-12-19T12:54:44Z 2024-12-19T12:54:44Z Journal Article https://hdl.handle.net/10568/165132 en Cambridge University Press Chauhan, Bhagirath Singh; Abugho, Seth Bernard. 2012. Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference. Weed sci., Volume 60 no. 3 p. 411-415 |
| spellingShingle | amaranthus spinosus biomass growth leaf area phenotypes weeds Chauhan, Bhagirath Singh Abugho, Seth Bernard Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference |
| title | Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference |
| title_full | Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference |
| title_fullStr | Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference |
| title_full_unstemmed | Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference |
| title_short | Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference |
| title_sort | phenotypic plasticity of spiny amaranth amaranthus spinosus and longfruited primrose willow ludwigia octovalvis in response to rice interference |
| topic | amaranthus spinosus biomass growth leaf area phenotypes weeds |
| url | https://hdl.handle.net/10568/165132 |
| work_keys_str_mv | AT chauhanbhagirathsingh phenotypicplasticityofspinyamaranthamaranthusspinosusandlongfruitedprimrosewillowludwigiaoctovalvisinresponsetoriceinterference AT abughosethbernard phenotypicplasticityofspinyamaranthamaranthusspinosusandlongfruitedprimrosewillowludwigiaoctovalvisinresponsetoriceinterference |