Rice root growth and development in competition with weedy rice
Abstract Background: Weedy rice belongs to the same taxon as irrigated rice (Oryza sativa L.), and is the main weed of the crop. However, it exhibits different traits that produce greater competitive capacity using solar radiation. In competition for light, plants invest in photoassimilates for th...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira da Ciência das Plantas Daninhas
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| Series: | Planta Daninha |
| Subjects: | |
| Online Access: | http://www.scielo.br/pdf/pd/v38/0100-8358-PD-38-e020216460.pdf |
| _version_ | 1818888370375360512 |
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| author | Carlos E. Schaedler Célio U.M. Taborda Francisco A.P. Goulart Diego M. Chiapinotto Paulo J. Pinho |
| author_facet | Carlos E. Schaedler Célio U.M. Taborda Francisco A.P. Goulart Diego M. Chiapinotto Paulo J. Pinho |
| author_sort | Carlos E. Schaedler |
| collection | DOAJ |
| description | Abstract Background: Weedy rice belongs to the same taxon as irrigated rice (Oryza sativa L.), and is the main weed of the crop. However, it exhibits different traits that produce greater competitive capacity using solar radiation. In competition for light, plants invest in photoassimilates for the shoots and can reduce their root development. Objectives: The objective of this work is to evaluate the initial growth of weedy and cultivated rice roots in response to light competition. Methods: The experiment was conducted in a greenhouse (hydroponic system), using a completely randomized design, arranged in a 2x2x6 factorial scheme, with five replications. Factor A consisted of the weedy rice biotype Q35B and the rice cultivar IRGA 424; factor B of light competition conditions (presence or absence of 75 weedy rice plants); and factor C of assessment time. At 0, 7, 14, 21, 28 and 35 days after transplanting, samples were taken from each experimental unity to measure the root area, perimeter, length, number of tips, and root dry weight (RDW), and shoot dry weight (SDW). Results: Competition for light reduced the area, perimeter, length, number of root tips, reduced the RDW and the SDW of both, the weedy rice biotype and crop rice. However, regardless of the competitive condition, the weedy rice showed a higher area, perimeter, initial growth, number of tips, RDW and SDW than that of cultivated rice. Conclusion: Weedy rice exhibits greater competitive capacity using the resources beneath the soil. |
| first_indexed | 2024-12-19T16:52:03Z |
| format | Article |
| id | doaj.art-a9e6c32ed99e486d98324d081a56f8a0 |
| institution | Directory Open Access Journal |
| issn | 0100-8358 |
| language | English |
| last_indexed | 2024-12-19T16:52:03Z |
| publisher | Sociedade Brasileira da Ciência das Plantas Daninhas |
| record_format | Article |
| series | Planta Daninha |
| spelling | doaj.art-a9e6c32ed99e486d98324d081a56f8a02022-12-21T20:13:31ZengSociedade Brasileira da Ciência das Plantas DaninhasPlanta Daninha0100-835810.1590/s0100-83582020380100086Rice root growth and development in competition with weedy riceCarlos E. SchaedlerCélio U.M. TabordaFrancisco A.P. GoulartDiego M. ChiapinottoPaulo J. PinhoAbstract Background: Weedy rice belongs to the same taxon as irrigated rice (Oryza sativa L.), and is the main weed of the crop. However, it exhibits different traits that produce greater competitive capacity using solar radiation. In competition for light, plants invest in photoassimilates for the shoots and can reduce their root development. Objectives: The objective of this work is to evaluate the initial growth of weedy and cultivated rice roots in response to light competition. Methods: The experiment was conducted in a greenhouse (hydroponic system), using a completely randomized design, arranged in a 2x2x6 factorial scheme, with five replications. Factor A consisted of the weedy rice biotype Q35B and the rice cultivar IRGA 424; factor B of light competition conditions (presence or absence of 75 weedy rice plants); and factor C of assessment time. At 0, 7, 14, 21, 28 and 35 days after transplanting, samples were taken from each experimental unity to measure the root area, perimeter, length, number of tips, and root dry weight (RDW), and shoot dry weight (SDW). Results: Competition for light reduced the area, perimeter, length, number of root tips, reduced the RDW and the SDW of both, the weedy rice biotype and crop rice. However, regardless of the competitive condition, the weedy rice showed a higher area, perimeter, initial growth, number of tips, RDW and SDW than that of cultivated rice. Conclusion: Weedy rice exhibits greater competitive capacity using the resources beneath the soil.http://www.scielo.br/pdf/pd/v38/0100-8358-PD-38-e020216460.pdfOryza sativasolar radiationroot system |
| spellingShingle | Carlos E. Schaedler Célio U.M. Taborda Francisco A.P. Goulart Diego M. Chiapinotto Paulo J. Pinho Rice root growth and development in competition with weedy rice Planta Daninha Oryza sativa solar radiation root system |
| title | Rice root growth and development in competition with weedy rice |
| title_full | Rice root growth and development in competition with weedy rice |
| title_fullStr | Rice root growth and development in competition with weedy rice |
| title_full_unstemmed | Rice root growth and development in competition with weedy rice |
| title_short | Rice root growth and development in competition with weedy rice |
| title_sort | rice root growth and development in competition with weedy rice |
| topic | Oryza sativa solar radiation root system |
| url | http://www.scielo.br/pdf/pd/v38/0100-8358-PD-38-e020216460.pdf |
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