High molecular size humic substances enhance phenylpropanoid metabolism in maize (Zea mays L.)
Abstract
A high molecular weight humic fraction (>3,500 Da) was characterized chemically by DRIFT and 1H NMR spectroscopy, and was applied to Zea mays L. plants to evaluate its effect on phenylpropanoid metabolism. The activity and gene expression of phenylalanine (tyrosine) ammonia-lyase (PAL/TAL), and the concentrations of phenolics and their amino acid precursors phenylalanine and tyrosine were assayed. Maximum induction of PAL/TAL activity and expression was obtained when the concentration of added humic substance was 1 mg C/l hydroponic solution. Phenylalanine and tyrosine significantly decreased (-16% and -22%, respectively), and phenolic compounds increased in treated plants. The effects of the humic substance could be ascribed partly to indoleacetic acid (27 nmol/mg C) in the humic fraction. Our results suggest that this humic fraction induces changes in phenylpropanoid metabolism. This is the first study that shows a relationship between humic substances and the phenylpropanoid pathway.
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The presence of aromatic moieties and stable humified organic compounds in the compost may have stimulated the production of polyphenolic compounds in lettuce foliar biomass.
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From Mars Regolith Simulant Ameliorated by Compost as in situ Cultivation Substrate Improves Lettuce Growth and Nutritional Aspects (2020) · cites this paper as [64]
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Fiorentino, N., Ventorino, V., Rocco, C., Cenvinzo, V., Agrelli, D., Gioia, L., Di Mola, I., Adamo, P., Pepe, O., & Fagnano, M. (2017) · Science of The Total Environment · doi:10.1016/j.scitotenv.2016.09.220 · Cited by 75 · see citing works
Duri, L. G., El-Nakhel, C., Caporale, A. G., Ciriello, M., Graziani, G., Pannico, A., Palladino, M., Ritieni, A., De Pascale, S., Vingiani, S., et al. (2020) · Plants · doi:10.3390/plants9050628 · Cited by 47 · see citing works
- Authors
- Schiavon, M., Pizzeghello, D., Muscolo, A., Vaccaro, S., Francioso, O., & Nardi, S.
- Affiliations
- University of Padua (IT)
- University of Reggio Calabria (IT)
- University of Bologna (IT)
- Corresponding author
- Pizzeghello, Diego
- Venue
- Journal of Chemical Ecology
- Published
- 2010-05-18
- Volume
- 36
- Issue
- 6
- Pages
- 662-669
- ISSN
- 0098-0331 (ISSN-L)
- 1573-1561
- OpenAlex
- W2076580959
- Cited by
- 223
- References
- 0
- Citations by year
- 2026: 10 · 2025: 14 · 2024: 28 · 2023: 29 · 2022: 21 · 2021: 26 · 2020: 15 · 2019: 19 · 2018: 11 · 2017: 9 · 2016: 10 · 2015: 7 · 2014: 13 · 2013: 5 · 2012: 5
- FWCI
- 3.92
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Journal of Chemical Ecology (publishedVersion)
- PubMed (publishedVersion)
- Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
- Institutional Research Information System University of Turin (University of Turin) (submittedVersion)
- Padua Research Archive (University of Padova) (submittedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Growth Enhancement Techniques
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant Gene Expression Analysis
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant biochemistry and biosynthesis
- Keywords
- humic substances, phenylpropanoid metabolism, maize, phenylalanine ammonia-lyase, tyrosine ammonia-lyase, phenolic compounds, phenylalanine, tyrosine, indole-3-acetic acid, gene expression, plant growth regulators
- MeSH terms
- Zea mays, Humic Substances, Magnetic Resonance Spectroscopy, Phenols, Phenylalanine, Phenylalanine Ammonia-Lyase, Plant Proteins, Tyrosine, Spectroscopy, Fourier Transform Infrared, Gene Expression Regulation, Plant
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