Abstract
The increasing culinary use of onion (Alium cepa) raises pressure on the current production rate, demanding sustainable approaches for increasing its productivity worldwide. Here, we aimed to investigate the beneficial effects of licorice (Glycyrrhiza glabra) root extract (LRE) in improving growth, yield, nutritional status, and antioxidant properties of two high-yielding onion cultivars, Shandaweel and Giza 20, growing under field conditions in two consecutive years. Our results revealed that pretreatments of both onion cultivars with LRE exhibited improved growth indices (plant height and number of leaves) and yield-related features (bulb length, bulb diameter, and bulb weight) in comparison with the corresponding LRE-devoid control plants. Pretreatments with LRE also improved the nutritional and antioxidant properties of bulbs of both cultivars, which was linked to improved mineral (e.g., K+ and Ca2+) acquisition, and heightened activities of enzymatic antioxidants (e.g., superoxide dismutase, catalase, ascorbate peroxidase, glutathione peroxidase, and glutathione S-transferase) and increased levels of non-enzymatic antioxidants (e.g., ascorbic acid, reduced glutathione, phenolics, and flavonoids). LRE also elevated the contents of proline, total free amino acids, total soluble carbohydrates, and water-soluble proteins in both onion bulbs. In general, both cultivars displayed positive responses to LRE pretreatments; however, the Shandaweel cultivar performed better than the Giza 20 cultivar in terms of yield and, to some extent, bulb quality. Collectively, our findings suggest that the application of LRE as biostimulant might be an effective strategy to enhance bulb quality and ultimately the productivity of onion cultivars under field conditions.
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Claims 9
Claim · model-written summary
Licorice root extract improved onion height and leaf number relative to untreated controls.
- Taxon
- onion
Allium cepae0 - Treatment
- LREe0
- Outcome
- plant height and number of leavese0
- Direction
- improvede0
- Comparator
- LRE-devoid control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pretreatments of both onion cultivars with LRE exhibited improved growth indices (plant height and number of leaves) and yield-related features (bulb length, bulb diameter, and bulb weight) in comparison with the corresponding LRE-devoid control plants.”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Licorice root extract improved bulb length, diameter, and weight.
- Taxon
- onionAllium cepae0
- Treatment
- LREe0
- Outcome
- bulb length, bulb diameter, and bulb weighte0
- Direction
- improvede0
- Comparator
- LRE-devoid control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pretreatments of both onion cultivars with LRE exhibited improved growth indices (plant height and number of leaves) and yield-related features (bulb length, bulb diameter, and bulb weight) in comparison with the corresponding LRE-devoid control plants.”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Licorice extract improved bulb nutritional and antioxidant properties.
- Taxon
- onionAllium cepat0
- Treatment
- LREe0
- Outcome
- nutritional and antioxidant properties of bulbse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pretreatments with LRE also improved the nutritional and antioxidant properties of bulbs of both cultivars”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Licorice extract improved K and Ca acquisition.
- Taxon
- onionAllium cepat0
- Treatment
- Licorice Root Extractt0
- Outcome
- mineral (e.g., K+ and Ca2+) acquisitione0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improved mineral (e.g., K+ and Ca2+) acquisition”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Licorice extract heightened enzymatic antioxidant activities.
- Taxon
- onionAllium cepat0
- Treatment
- Licorice Root Extractt0
- Outcome
- activities of enzymatic antioxidantse0
- Direction
- heightenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heightened activities of enzymatic antioxidants (e.g., superoxide dismutase, catalase, ascorbate peroxidase, glutathione peroxidase, and glutathione S-transferase)”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Licorice extract increased nonenzymatic antioxidants.
- Taxon
- onionAllium cepat0
- Treatment
- Licorice Root Extractt0
- Outcome
- levels of non-enzymatic antioxidantse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased levels of non-enzymatic antioxidants (e.g., ascorbic acid, reduced glutathione, phenolics, and flavonoids).”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Licorice extract increased proline and free amino acids in onion bulbs.
- Taxon
- onionAllium cepae0
- Treatment
- LREe0
- Outcome
- contents of proline, total free amino acidse0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LRE also elevated the contents of proline, total free amino acids, total soluble carbohydrates, and water-soluble proteins in both onion bulbs.”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Licorice extract increased soluble carbohydrate and water soluble protein in onion bulbs.
- Taxon
- onionAllium cepae0
- Treatment
- LREe0
- Outcome
- total soluble carbohydrates, and water-soluble proteinse0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LRE also elevated the contents of proline, total free amino acids, total soluble carbohydrates, and water-soluble proteins in both onion bulbs.”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
Claim · model-written summary
Shandaweel outperformed Giza 20 in yield and partly in bulb quality.
- Taxon
- onionAllium cepat0
- Material
- Shandaweele0
- Outcome
- yield and, to some extent, bulb qualitye0
- Direction
- bettere0
- Comparator
- Giza 20e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Shandaweel cultivar performed better than the Giza 20 cultivar in terms of yield and, to some extent, bulb quality.”
t0“Antioxidants and Bioactive Compounds in Licorice Root Extract Potentially Contribute to Improving Growth, Bulb Quality and Yield of Onion (Allium cepa)”
The same questions in other papers
botanical · molecular: metabolites · Allium cepa (onion)Positive and negative results
5 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
9 papers more in this group
See all 13 papers →botanical · physiology: enzyme activity · Allium cepa (onion)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.