High molecular size humic substances enchance phenylpropanoid metabolism in maize (Zea mays L.)
Articolo
Data di Pubblicazione:
2010
Citazione:
High molecular size humic substances enchance phenylpropanoid metabolism in maize (Zea mays L.) / Schiavon, M., Pizzeghello, D., Muscolo, A.M., Vaccaro, S., Francioso, O., Nardi, S.. - In: JOURNAL OF CHEMICAL ECOLOGY. - ISSN 0098-0331. - (2010). [10.1007/s10886-010-9790-6.]
Abstract:
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
(>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
Tipologia CRIS:
1.1 Articolo in rivista
Elenco autori:
Schiavon, M; Pizzeghello, D; Muscolo, Adele Maria; Vaccaro, S; Francioso, O; Nardi, S
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