Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/58814
Title: Elevated carbon assimilation and metabolic reprogramming in tomato high pigment mutants support the increased production of pigments
Keywords: High pigment
Shading
Metabolite profle
Photosynthesis
Pigments
Issue Date: 14-Jul-2022
Publisher: Springer
Citation: PEREIRA, A. M. et al. Elevated carbon assimilation and metabolic reprogramming in tomato high pigment mutants support the increased production of pigments. Plant Cell Reports, [S.l.], v. 41, p. 1907-1929, Sept. 2022. DOI: 10.1007/s00299-022-02900-y.
Abstract: High pigment mutations cause plants to be extremely responsive to light and produce excessive pigmentation as well as fruits with high levels of health-beneficial nutrients. However, the association of these traits with changes in the physiology and metabolism of leaves remains poorly understood. Here, we performed a detailed morphophysiological and metabolic characterization of high pigment 1 (hp1) and high pigment 2 (hp2) mutants in tomato (Solanum lycopersicum L. ‘Micro-Tom’) plants under different sunlight conditions (natural light, 50% shading, and 80% shading). These mutants occur in the DDB1 (hp1) and DET1 (hp2) genes, which are related to the regulation of photomorphogenesis and chloroplast development. Our results demonstrate that these mutations delay plant growth and height, by affecting physiological and metabolic parameters at all stages of plant development. Although the mutants were characterized by higher net CO2 assimilation, lower stomatal limitation, and higher carboxylation rates, with anatomical changes that favour photosynthesis, we found that carbohydrate levels did not increase, indicating a change in the energy flow. Shading minimized the differences between mutants and the wild type or fully reversed them in the phenotype at the metabolic level. Our results indicate that the high levels of pigments in hp1 and hp2 mutants represent an additional energy cost for these plants and that extensive physiological and metabolic reprogramming occurs to support increased pigment biosynthesis.
URI: https://link.springer.com/article/10.1007/s00299-022-02900-y
http://repositorio.ufla.br/jspui/handle/1/58814
Appears in Collections:DBI - Artigos publicados em periódicos

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