| Revue: | Acta scientiarum. Biological sciences |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000433582 |
| ISSN: | 1679-9283 |
| Autores: | Macedo, Lucas Chagastelles Pinto de1 Dornelles, Sylvio Henrique Bidel1 Peripolli, Mariane1 Trivisiol, Vinícius Severo1 Conceição, Danúbia Quadros da1 Pivetta, Maicon1 Escobar, Otávio dos Santos1 Essi, Liliana1 |
| Instituciones: | 1Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul. Brasil |
| Año: | 2019 |
| Volumen: | 41 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | The genetic variability and genetic versatility of plants belonging to Poaceae provide morphophysiological responses that allow these individuals to adapt to environmental changes, especially in relation to soil moisture. Urochloa plantaginea and U. platyphylla are grasses typical of dry environment, also found as weeds in rice fields, where there are high amounts of water in the soil. The objective of this work is to analyze the development of these two species in different environments, subjecting them to three different amounts of water in the soil. Morphological parameters were analyzed in order to verify and quantify which suffered alteration with respect to water variation. Caryopsis of the two species were collected in a commercial irrigated rice crop. Seeds were sown in pots containing a substrate-sand system, and housed in a greenhouse, where during the experiment the control of different moisture contents (shallow water table, 100% of field capacity and 50% of field capacity) took place. Weekly evaluations were carried out according to the parameters analyzed. The following parameters were evaluated: duration of the vegetative and reproductive life cycle, number of the inflorescences per plant, number of branches per inflorescence, number of spikelets per branch, number of seeds per plant, and dry mass production. The U. plantaginea cycle had shorter duration under the shallow water table, while for U. platyphylla the shorter duration was under the condition 50% of field capacity. Both species produced higher dry mass of shoots under the condition of 100% of field capacity. The main responses observed for both species, due to the flooding, were the change of the cycle, reduced dry matter production, and reduced seed production |
| Disciplinas: | Biología |
| Palabras clave: | Fisiología vegetal, Gramíneas, Malezas, Régimen hídrico, Capacidad de campo, Fenología, Masa seca, Urochloa plantaginea, Urochloa platyphylla, Poaceae |
| Keyword: | Plant physiology, Gramineae, Weeds, Water regime, Field capacity, Phenology, Dry mass, Urochloa plantaginea, Urochloa platyphylla, Poaceae |
| Texte intégral: | http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46127/pdf |
