Agronomic biofortification efficiency of upland rice genotypes with selenium and i...
| Grant number: | 15/11690-3 |
| Support type: | Scholarships in Brazil - Master |
| Effective date (Start): | December 01, 2015 |
| Effective date (End): | January 31, 2017 |
| Field of knowledge: | Agronomical Sciences - Agronomy |
| Principal Investigator: | André Rodrigues dos Reis |
| Grantee: | Heitor Pontes Gestal Reis |
| Home Institution: | Faculdade de Ciências e Engenharia. Universidade Estadual Paulista (UNESP). Campus de Tupã. Tupã , SP, Brazil |
Abstract Selenium is an important element for humans, animals and plants, however, there are evidences of selenium deficiency in Brazilian soils. Rice is one of the main edible crop in the Brazilian diet, so the agronomic biofortification with selenium can be a good strategy to increase selenium levels in Brazilian population. There are a lack of information about the genotypic variation on selenium accumulation in rice plants and the possibility to screen more efficient and responsive plants to selenium supply. The aim of this study is to evaluate the genotypic differences on selenium accumulation and its relationship to nutritional quality of grains. To achieve this purpose, the evaluation of selenium supply on plant physiology and biochemistry is needed to better understand the distribution of selenium in plant parts. To select responsive genotypes to selenium supply, 35 genotypes of upland rice will be evaluated under 2 levels of selenium supply (0 and 0.2 mg dm-3). Parallel experiments under field conditions will be conduct to evaluate the effect of selenium levels application (0, 10, 25, 50 and 100 g ha-1) on grain nutritional quality. In addition, to evaluate the possible interaction between nitrogen and selenium metabolism, an experiment will be conducted containing five nitrogen levels (0, 20, 40, 80 and 120 kg ha-1), and 2 levels of selenium (control and a reccommended selenium level based on results from experiment 2). Biochemical properties and organic forms of selenium such as selenomethionine and selenocysteine content will be analyzed in grains harvested from experiments. The better understanding of key factors involved on genotypic variation and selenium accumulation in plants in response to fertilizer, can provide powerful information for plant breeding, mineral nutrition, fertilization, and for production of better nutritional quality food. | |