Aljaž Medič (Author), Tilen Zamljen (Author), Ana Slatnar (Author), Metka Hudina (Author), Mariana Cecilia Grohar (Author), Robert Veberič (Author)

Abstract

The consumption of fresh vegetables has been consistently associated with numerous health benefits. However, several factors (such as allelochemicals) influence yield, quality, and metabolites, which inevitably affect the fruit quality and health benefits. The present study was conducted to investigate the yield, quality, metabolic responses, and potential toxicity of Cucumis sativus grown in juglone-containing soils. For the treatments, pure juglone (100 [mi]M, 1 mM) and walnut leaf extracts (100 [mi]M) in soil concentrations found in walnut orchards were used. A total of 36 phenolic compounds were identified and quantified in fruits, leaves, and roots using a mass spectrometer coupled with high-performance liquid chromatography. We concluded that juglone at a concentration of 100 M or walnut leaf extract at the same juglone concentration does not affect the yield of C. sativus, while juglone at a concentration of 1 mM strongly affects it. In the case of juglone, juglone itself was found only in the roots of C. sativus, but not in the leaves or fruits, so C. sativus fruits are considered safe for cultivation in juglone-containing soils. However, this could prove problematic if the plants grown are tubers or root vegetables. The data suggest that juglone itself inhibits secondary metabolism in the plant, making it more susceptible to stress and pathogen attacks.

Keywords

allelopathy;cucumber;naphthoquinones;juglone (5-hydroxy-1,4-naphthalenedione);phenolic compounds;toxic residue;HPLC;mass spectrometry;LC-MS;snack cucumber;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 634
COBISS: 138199555 Link will open in a new window
ISSN: 2304-8158
Views: 353
Downloads: 63
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Other data

Secondary language: Slovenian
Secondary keywords: alelopatija;kumare;juglon;fenolne spojine;masna spektrometrija;
Type (COBISS): Article
Pages: 20 str.
Volume: ǂVol. ǂ12
Issue: ǂiss. ǂ2, art. 371
Chronology: 2023
DOI: 10.3390/ foods12020371
ID: 17754888