Abstract
Tagetes erecta L. is an ornamental crop known for its medicinal qualities. Large amounts of waste are produced in the commercial usage of T. erecta flowers, including leaves that could be used to develop new eco-friendly phenolic extracts with additional value for the food industry. To maximize the phenol content in the leaf extracts, this study used a Box–Behnken design with Response Surface Methodology, considering three extraction methods (Soxhlet distillation, heat, and vacuum-assisted extraction), three cropping practices (without fertilizer, chemical fertilizer, and vermicompost), and three phenological stages (plants without buds, with buds, and in flower). Extracts from plants fertilized with vermicompost (Eisenia foetida, 10 t ha−1), collected during the blossoming stage and extracted via Soxhlet distillation, exhibited the highest phenol content (25.66 mg GAE/g). Further chemical characterization of the optimized extract (UV-Vis, UV-fluorescence, FTIR, GC-MS, HPLC) confirmed the occurrence of polyphenols in the extract, including quercetin, chlorogenic, gallic, p-coumaric, 3-hydroxycinnamic, and caffeic acids. This underscores the significance of T. erecta leaf residues as a valuable source of bioactive molecules, highlighting the importance of integrating agricultural practices and chemical extraction methods to enhance the phenolic content in leaf extracts from this species.
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Claims 2
Claim · model-written summary
Leaf extracts from vermicompost-fertilized plants at the blossoming stage had the highest phenol content.
- Taxon
- Tagetes erecta L.
Tagetes erectae0 - Organ / stage
- blossoming stagee1
- Treatment
- vermicompost (Eisenia foetida, 10 t ha−1)e1
- Outcome
- phenol contente1
- Direction
- higheste1
- Value
- 25.66 mg GAE/ge1
- Comparator
- without fertilizer, chemical fertilizere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tagetes erecta L. is an ornamental crop”
e2“three cropping practices (without fertilizer, chemical fertilizer, and vermicompost)”
e1“Extracts from plants fertilized with vermicompost (Eisenia foetida, 10 t ha−1), collected during the blossoming stage and extracted via Soxhlet distillation, exhibited the highest phenol content (25.66 mg GAE/g)”
Claim · model-written summary
Polyphenols, including quercetin, chlorogenic, gallic, p-coumaric, 3-hydroxycinnamic and caffeic acids, occur in the optimized extract.
- Taxon
- Tagetes erecta L.Tagetes erectae0
- Outcome
- occurrence of polyphenols in the extracte3
- Qualifier
- quercetin, chlorogenic, gallic, p-coumaric, 3-hydroxycinnamic, and caffeic acidse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tagetes erecta L. is an ornamental crop”
e3“confirmed the occurrence of polyphenols in the extract, including quercetin, chlorogenic, gallic, p-coumaric, 3-hydroxycinnamic, and caffeic acids”
The same questions in other papers
fertilization · quality: phytochemicals · Tagetes erecta (African marigold)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.