INFIVE   05416
INSTITUTO DE FISIOLOGIA VEGETAL
Unidad Ejecutora - UE
capítulos de libros
Título:
Physiological processes contributing to the synthesis of ascorbic acid in plants
Autor/es:
BARTOLI, CARLOS G.; GERGOFF GROZEFF, GUSTAVO E.; SENN, MAR√ćA EUGENIA
Libro:
Redox State as a Central Regulator of Plant-Cell Stress Responses
Editorial:
Springer International Publishing
Referencias:
Año: 2016; p. 71 - 92
Resumen:
Ascorbic acid (AA) is present in high concentration in plant tissues and participates of many vital processes. Its biosynthetic pathway in plants has been recently established. Nowadays research is focused on understanding the regulation of this pathway. One of the aspects is to unravel the importance of each enzyme through the establishment of limiting reactions and specific controlling processes. Interestingly, the synthesis of AA presents a high interaction with several physiological processes. The photosynthetic activity directly affects AA synthesis and the last reaction of its formation takes place in mitochondria depending on the mitochondrial electron transport chain. In addition, it is now known how some plant hormones regulate this pathway. The incident light constitutes a key environmental factor controlling the synthesis of AA in plants. Light regulates the levels of several enzymes but its effect on AA biosynthesis is also mediated through modifications in the previously mentioned physiological processes. The knowledge about the regulation of AA synthesis will allow the development of manipulative strategies leading to effectively increase the concentration of AA in edible plant organs.
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