ArticleBMC plant biology2026
Comparison of biomass and antioxidant phenolic compound of kale under supplemental UV-A and deep-blue LED lights.
Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
Abstract
backgroundThis study aimed to evaluate the effects of ultraviolet-A (UV-A) and deep-blue light-emitting diodes (LEDs) on the growth and antioxidant phenolic content of kale (Brassica oleracea var. acephala) and to explore potential boundary effects between UV-A and visible light. Five-week-old kale seedlings cultivated in a vertical farm module were exposed to supplemental UV-A (peak wavelength at 365, 385, and 395 nm) and deep-blue (peak wavelength at 405, 415, 430, and 440 nm) light at an intensity of 30 W m⁻² for 7 days.
resultsThe supplemental light treatments enhanced the biomass, showing the most significant improvement at 415 nm. During the light period, photosynthetic rate peaked at 415 nm, and carbon dioxide exchange was observed during the background-light-off period, with higher rates under deep-blue light. The maximum quantum efficiency of photosystem II (Fv/Fm) remained above 0.8 under deep-blue treatments but decreased under UV-A treatments. Hydrogen peroxide levels increased significantly across treatments from days 2 to 7. Except for the 365 nm treatment, phenylalanine ammonia-lyase enzyme activity also increased. Total phenolic content and antioxidant capacity significantly increased in the 395, 405, 415, 430, and 440 nm treatments, with values in the 415 nm treatment being 2-fold higher compared to the control.
conclusionsThese findings suggest that deep-blue light, particularly at 415 nm, may enhance biomass and secondary metabolite accumulation in kale. The results also indicate a potential functional transition region between UV-A and deep-blue light around 400 nm.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.