| Revista: | Scientia Agricola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000455511 |
| ISSN: | 0103-9016 |
| Autores: | Lanna, Anna Cristina1 Coelho, Gesimária Ribeiro Costa1 Moreira, Alécio Souza2 Terra, Thiago Gledson Rios3 Brondani, Claudio1 Saraiva, Gabriel Rios4 Lemos, Frederico da Silva4 Guimarães, Paulo Henrique Ramos5 Morais-Júnior, Odilon Peixoto5 Vianello, Rosana Pereira1 |
| Instituciones: | 1Empresa Brasileira de Pesquisa Agropecuaria, Arroz e Feijao, Santo Antonio de Goias, Goias. Brasil 2Empresa Brasileira de Pesquisa Agropecuaria, Mandioca e Fruticultura, Araraquara, Bahia. Brasil 3Universidade Federal do Tocantins, Laboratorio de Plantas Infestantes, Gurupi, Tocantins. Brasil 4Uni-Ahanguera, Centro Universitario de Goias, Goiania, Goias. Brasil 5Universidade Federal de Goias, Departamento de Genetica e Melhoramento de Plantas, Goiania, Goias. Brasil |
| Año: | 2021 |
| Volumen: | 78 |
| Número: | 5 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Upland rice is cultivated mostly in Latin America and Africa by small farmers and in areas with risk of dry spells. This study evaluated morphophysiological mechanisms of upland rice associated to drought adaptation. A set of 25 upland rice genotypes were grown in a plant phenotyping platform during 2015 and 2017 under regular irrigation and water restriction. We evaluated morphophysiological traits in shoots (vegetative structures growth, gas exchange, water use efficiency, carboxylation efficiency, water status) and roots (length, surface area, volume and diameter), as well as agronomic traits (grain yield and its components). There was a reduction in grain yield by up to 54 % and 58 % in 2015 and 2017, respectively, under water deficit. Five upland rice genotypes with the best yield performances in both water treatments applied were recommended to the upland rice-breeding program: Bico Ganga, BRS Esmeralda, BRSMG Curinga, Guarani, and Rabo de Burro. In this study, morphophysiological traits associated to drought tolerance concerned the plant high capacity to save water in the leaves, low leaf water potential, high ability to reduce vegetative structures, high water use efficiency, high photosynthetic capacity, and improved capacity to absorb water from drying soil, either by osmotic adjustment or additional investment into the root system. Therefore, we concluded that different secondary traits contributed to drought tolerance and should be evaluated along with grain yield to improve efficiency of breeding selection |
| Disciplinas: | Agrociencias, Biología |
| Palabras clave: | Gramíneas, Fisiología vegetal, Arroz, Oryza sativa, Estrés hídrico, Tolerancia a la sequía, Diversidad fenotípica |
| Keyword: | Gramineae, Plant physiology, Rice, Oryza sativa, Water stress, Drought tolerance, Phenotypic diversity |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
