Calcium- and hormone-driven regulation of secondary metabolism and cell wall enzymes in grape berry cells

Journal of Plant Physiology
Viviana MartinsHernâni Gerós

Abstract

The efficacy of calcium sprays for improving fleshy fruit resistance to abiotic/biotic stress and enhancement of fruit shelf life has increasingly been explored. However, because calcium is a powerful secondary messenger in many signaling pathways, including those driven by abscisic acid (ABA) and jasmonates, it may interfere with the biosynthesis of specialized metabolites highly important for fruit and wine quality, such as phenolic compounds. In this study, a combination of biochemical and molecular biology approaches were applied to grape cell cultures and detached grape berries, in order to investigate the effect of calcium in the modulation of enzymes involved in the biosynthesis of phenolic compounds and in cell wall organization. Concentrations up to 10 mM CaCl2 did not affect cell growth, size or viability, but triggered modifications in total phenolics content, particularly in anthocyanin levels in grape cell suspensions. The effects of calcium applied alone or in combination with ABA or methyl jasmonate (MeJA) were visible in several branches of specialized metabolic pathways, confirming that the calcium-hormone interplay regulates the expression of phenylalanine ammonia lyase (PAL), stilbene synthase (STS), dihydrof...Continue Reading

Citations

Jan 12, 2020·Biotechnology and Applied Biochemistry·Konstantin V Kiselev, Alexandra S Dubrovina
Apr 30, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Andrey S Marchev, Milen I Georgiev
Jun 3, 2021·Plant Physiology and Biochemistry : PPB·Viviana MartinsArnaud Lanoue

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