Abstract
Narrowband green (G), blue (B), red (R), and polychromatic (W ‒ R:G:B, 1:1:1) lights were supplemented (250 µmol photon m‒2 s‒1; 5 h d−1; 21 d) to ambient light with Light Emitting Diodes (LED) in green- (‘Tigullio’; TI) and red-leafed (‘Red Rubin’; RR) sweet basil (Ocimum basilicum L.) plants. The aim of this work was to evaluate LED-triggered variations in biometric and morpho-anatomical traits, photosynthesis and secondary metabolite production to ‘photomodulate’ plant performance via monochromatic LED light supplementation. In both the cultivars, light supplementation did not alter plant biomass production compared to controls and at the amplitude applied therein any LED supplementation resulted in oxidative stress, as evidenced by slight changes in chlorophyll fluorescence parameters and H2O2 staining in leaves. Conversely, monochromatic LEDs selectively modulate metabolomics profile in both green- and red-leafed basil; e.g., B lights increased polyphenol content in TI, whilst G light resulted effective in reducing cyanidin-3-coumaroil-glucoside one of the prevalent acylated anthocyanin of RR. Volatilome profile unveiled profound waveband-dependent alterations though consistently eugenol, characterised by a clove flavor, and also considered one of the major toxic compounds in sweet basil, decreased with all the LED treatments, making green-leafed basil a more pleasant and safer product. Our dataset offers the clear evidence that monochromatic LED light supplementation represents a valid tool to modulate the accumulation of targeted secondary metabolites in planta.
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Claims 6
Claim · model-written summary
LED supplementation did not alter biomass production in either basil cultivar relative to controls.
- Taxon
- sweet basil
Ocimum basilicumt0 - Treatment
- light supplementatione0
- Outcome
- plant biomass productione0
- Direction
- did not altere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet basil”
e0“In both the cultivars, light supplementation did not alter plant biomass production compared to controls”
Claim · model-written summary
LED supplementation produced no oxidative stress at the applied amplitude.
- Taxon
- sweet basilOcimum basilicumt0
- Treatment
- LED supplementatione0
- Outcome
- oxidative stresse0
- Qualifier
- at the amplitude applied thereine0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet basil”
e0“at the amplitude applied therein any LED supplementation resulted in oxidative stress”
Claim · model-written summary
Blue light increased polyphenol content in Tigullio basil.
- Taxon
- sweet basilOcimum basilicumt0
- Material
- TIe0
- Treatment
- B lightse0
- Outcome
- polyphenol contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet basil”
e0“B lights increased polyphenol content in TI”
Claim · model-written summary
Green light reduced cyanidin-3-coumaroil-glucoside in Red Rubin basil.
- Taxon
- sweet basilOcimum basilicumt0
- Material
- RRe0
- Treatment
- G lighte0
- Outcome
- cyanidin-3-coumaroil-glucosidee0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet basil”
e0“G light resulted effective in reducing cyanidin-3-coumaroil-glucoside one of the prevalent acylated anthocyanin of RR”
Claim · model-written summary
LED wavelength altered the basil volatile profile.
- Taxon
- sweet basilOcimum basilicumt0
- Treatment
- wavebande0
- Outcome
- Volatilome profilee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet basil”
e0“Volatilome profile unveiled profound waveband-dependent alterations”
Claim · model-written summary
Eugenol decreased under every LED treatment.
- Taxon
- sweet basilOcimum basilicume0
- Treatment
- all the LED treatmentse0
- Outcome
- eugenole0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet basil”
e0“eugenol, characterised by a clove flavor, and also considered one of the major toxic compounds in sweet basil, decreased with all the LED treatments”
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