Biostimulant Action of Dissolved Humic Substances From a Conventionally and an Organically Managed Soil on Nitrate Acquisition in Maize Plants.
dissolved organic matter
nitrate uptake
organic farming
root gene expression
soil organic matter
Journal
Frontiers in plant science
ISSN: 1664-462X
Titre abrégé: Front Plant Sci
Pays: Switzerland
ID NLM: 101568200
Informations de publication
Date de publication:
2019
2019
Historique:
received:
03
10
2019
accepted:
22
11
2019
entrez:
11
2
2020
pubmed:
11
2
2020
medline:
11
2
2020
Statut:
epublish
Résumé
Conversion of conventional farming (CF) to organic farming (OF) is claimed to allow a sustainable management of soil resources, but information on changes induced on dissolved organic matter (DOM) are scarce. Among DOM components, dissolved humic substances (DHS) were shown to possess stimulatory effects on plant growth. DHS were isolated from CF and OF soil leacheates collected from soil monolith columns: first in November (bare soils) and then in April and June (bare and planted soils). DHS caused an enhancement of nitrate uptake rates in maize roots and modulated several genes involved in nitrogen acquisition. The DHS from OF soil exerted a stronger biostimulant action on the nitrate uptake system, but the first assimilatory step of nitrate was mainly activated by DHS derived from CF soil. To validate the physiological response of plants to DHS exposure, real-time RT-PCR analyses were performed on those genes most involved in nitrate acquisition, such as
Identifiants
pubmed: 32038669
doi: 10.3389/fpls.2019.01652
pmc: PMC6974922
doi:
Types de publication
Journal Article
Langues
eng
Pagination
1652Informations de copyright
Copyright © 2020 Vujinović, Zanin, Venuti, Contin, Ceccon, Tomasi, Pinton, Cesco and De Nobili.
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