In:
Journal of the Science of Food and Agriculture, Wiley
Abstract:
The present study set out to evaluate the potential of plant growth‐promoting Actinobacteria (PGPB) in improving some physiological and molecular parameters of rapeseed ( Brassica napus L.) plants under ambient and elevated CO 2 conditions by assessing some nitrogen‐ and sulfur‐containing metabolites, antioxidant defense system and antimicrobial activity. With this aim, a pot experiment was conducted where the rapeseed plants were treated with Actinobacterium sp. strain NCO2 (OQ451136) and were grown under two levels of air CO 2 concentrations: ambient CO 2 (aCO 2 , 410 μmol CO 2 mol −1 ); and elevated CO 2 (eCO 2 , 710 μmol CO 2 mol −1 ). RESULTS There was an increase in the photosynthetic pigments (+35–80%) and photosynthesis rate (+20–34%) in PGPB‐treated plants under eCO 2 compared to control plants, resulting in further growth and biomass production (+53–294%). These results were associated with an enhancement in the content of total antioxidant capacity (+15–128%), polyphenols (+21–126%) and α ‐tocopherols (+20–138%) under both eCO 2 and PGPB application (in combination or individual application), while only the combined treatment (eCO 2 + PGPB) led to a significantly higher accumulation of antioxidant enzymes (+88–197%), β ‐tocopherols (+177%) and flavonoids (+155%). Moreover, nitrogen‐ and sulfur‐containing metabolites (glucosinolates and amino acids) were improved by PGPB treatment and/or CO 2 levels, in which PGPB increased the amino acid‐derived glucosinolate induction by eCO 2 with low levels of effective sulforaphane. CONCLUSIONS Therefore, the interaction effects of beneficial Actinobacteria and eCO 2 are expected to boost the level of antioxidant molecules and to have a helpful role in improving plant biomass and adaptability to complicated climate changes in the future. © 2023 Society of Chemical Industry.
Type of Medium:
Online Resource
ISSN:
0022-5142
,
1097-0010
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2001807-1
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