Novel gene encoding an F-box protein which regulates leaf longevity in Arabidopsis thaliana and mutant genes thereof

摘要

The present invention relates to a leaf-life regulating gene ORE9 isolated from Arabidopsis thaliana , a mutant form of the gene, a mutant gene ore9 that inhibits various physiological and biochemical changes associated with aging of a plant to prolong the life of the plant, It relates to the use of genes. Specifically, the leaf-life regulating gene ORE9 encodes an ORE9 protein consisting of 693 amino acids. The ORE9 protein contains an F-box motif and 18 leucine-rich repeats And regulates plant senescence by influencing the interaction of proteins involved in the onset of senescence through F-box motifs. In addition, the plants having the mutant gene ore9 encoding the protein having the short leucine repetition sequence as compared with the wild type and having the translation terminated prematurely as the mutant type of the ORE9 gene have an average life of 27% longer than that of the wild type, Life expectancy is prolonged after hormone treatment. Therefore, it is possible to increase the productivity and storage efficiency of plants by extending the life span of the leaf life regulating genes and their mutants provided in the present invention, and to search for genes or plant senescence inhibitors related to plant life span control The above genes can be used for the development of biomarkers for such diseases.