2026-06-01T14:48:24Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/139852026-02-03T12:32:00Zcom_10630_2254col_10630_37959

Regulation of Vitamin C content in higher plants Fenech-Torres, Mario Amorim-Silva, Vitor Smirnoff, Nicholas Botella-Mesa, Miguel Ángel Fotosíntesis Ascorbic Acid (AsA, vitamin C) has multiple biological roles in plants. Although several pathways for the novo synthesis of AsA have been reported, it is the L-Gal, also known as the Smirnoff-Wheeler (SW), the main pathway operating in photosynthetic tissues in plants. Although there is abundant information of how these genes are regulated at the transcriptional level, little is known about the regulation and the compartmentation of this pathway in higher plants. In order to investigate the localization of dynamics of proteins involved in AsA biosynthesis in vivo at the cellular level, we have generated GFP fusions using the genomic region of the last five genes of the pathway, expected to be localized in the cytoplasm. These constructs have been transformed in Arabidopsis thaliana (Col- 0) plants and generated stable transgenic lines. Detailed localization and dynamics of the proteins are currently being investigated. In parallel, we have analyzed whether these proteins form a complex in planta using co-immunoprecipitation assays using Nicotiana benthamiana. Our data indicate that most protein of the SW pathway show a nucleocytoplasmic localization and that they associate in vivo. Details of the results obtained will be presented. 2017-06-23T10:13:36Z 2017-06-23T10:13:36Z 2017-06-23T10:13:36Z 2017-06-23 conference output http://hdl.handle.net/10630/13985 http://orcid.org/0000-0002-8867-1831 eng At the Forefront of Plant Research Ghent, Belgium 15-6-2017 open access by-nc-nd