ISHS Acta Horticulturae 580: IV International ISHS Symposium on Artificial Lighting
VARIATIONS IN CONCENTRATION OF ACTIVE COMPOUNDS IN FOUR HYDROPONICALLY-AND FIELD-GROWN MEDICINAL PLANT SPECIES |
| Authors: | K. Pedneault, S. Léonhart, A. Gosselin, A.P. Papadopoulos, M. Dorais, P. Angers |
| Keywords: | Achillea millefolium, apigenin, chicoric acids, chlorogenic acid, Inula helenium, (iso)alantolactone, luteolin, parthenolide, phenolic, sesquiterpene, Tanacetum parthenium, Taraxacum officinale |
| Abstract:
Several medicinal plant species react to their environment by secreting secondary metabolites. Known to interact with human biology and pathogens, these compounds protect the plant against environmental stress. The purpose of this study was to investigate the influence of greenhouse hydroponics culture of four medicinal plant species on the concentration of secondary metabolites: caftaric, chicoric and chlorogenic acids of Taraxacum officinale, luteolin, apigenin and apigenin glycosides of Achillea millefolium, parthenolide of Tanacetum parthenium and (iso)alantolactones of Inula helenium. We compared the bioactive compound concentration of plants grown under greenhouse hydroponics and field conditions. Our results showed that phenolic compound concentration from T. officinale was 6.2 times higher in field-grown plants (31.2 mg/g dw) compared to hydroponics (5.0 mg/g dw). On the other hand, a significantly higher concentration of flavonoids was observed in hydroponically-grown A. millefolium (0.43% w/w dw) compared to field-grown plants (0.38 % w/w dw). The main flavonoids were apigenin glycosides which were principally located in the hydroponically-grown root (1.91 % w/w dw). Sesquiterpene lactones from I. helenium were more concentrated in field-grown root (1.49 mg/g dw) compared to hydroponically-grown root (0.56 mg/g dw). Similarly, parthenolide was mostly concentrated in the field-grown flower (3.8% w/w dw) and leaf (1.85% w/w dw) than hydroponically-grown flower (1.2 % w/w dw) and leaf (0.38 % w/w dw). These results have shown that greenhouse hydroponics culture of some medicinal plants under supplemental lighting is feasible and could provide a higher level of bioactive molecules, a pesticide free and constant quality product year around. | |
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