Influ?ncia dos transportadores de amino?cidos OsAAP1 e OsAAP18 na remobiliza??o de nitrog?nio e ac?mulo de prote?nas nos gr?os de arroz

• Autor(a) principal: Coelho, Cassia Pereira
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
• Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/2794
• topic: Plantas mutantes; Oryza sativa L.; Efici?ncia de uso de nitrog?nio (EUN); Mutant plants; Nitrogen useefficiency (NUE); Agronomia

The main goal of the study was to elucidate the functions of the OsAAP1 and OsAAP18 genes and check its influence on the N remobilization to grains filling and storage of proteins in rice plants. To this, were performed experiments to: (1) Phenotypic characterization of T-DNAi nsertional mutant plants of Dong Jin rice varietyand (2) check affinity of transport for amino acids, through functional complementation of yeast mutant strains 22 8AA, unable to transport efficiently L-proline, L-citrulline, L-aspartate and L.glutamate, 22?6AAL, unable to transport efficiently L-lysine and JA248, unable to transport efficiently L-glutamine. The phenotypic analyze of the mutant plants was developed through a greenhouse experiment using theT-DNAs insertonal mutants lines 3A-00581, mutant for the gene LOC_Os07g04180 (OsAAP1), and 4A-00262, mutant for LOC_Os0636210 gene (OsAAP18) and wild type plants.Complementation tests with mutants yeasts were performed on nitrogen-free medium supplemented with L-proline, L-citrulline, L-aspartate, L-glutamate, L-lisyne or L-glutamine as the sole nitrogen source. Frm the results it was concluded that genes OsAAP1 e OsAAP18 encode to proteins involved in nitrogen remobilization to gains in rice plants and OsAAP18 influences rice productivity protein content in grains.