Wavelength and light intensity enhance growth, phytochemical contents and antioxidant activity in micropropagated plantlets of Urtica dioica L

Urtica dioica L. (Urticaceae), popularly known as nettle, is a medicinal plant used by the textile, food and pharmaceutical industry. The aim of the current study is to evaluate the influence of different LED wavelengths and light intensity on the growth, phytochemical content and antioxidant activi...

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Published in:Plant cell, tissue and organ culture tissue and organ culture, 2021-04, Vol.145 (1), p.59-74
Main Authors: Coelho, Adriane Duarte, de Souza, Camila Knopp, Bertolucci, Suzan Kelly Vilela, de Carvalho, Alexandre Alves, Santos, Gustavo Costa, de Oliveira, Thainá, Marques, Erica Alves, Salimena, Juliana Pace, Pinto, José Eduardo Brasil Pereira
Format: Article
Language:English
Subjects:
Antioxidants
Biomedical and Life Sciences
Dry weight
Etiolation
Flavonoids
Fluorescent lamps
Food industry
Herbal medicine
Leaf area
Life Sciences
Light emitting diodes
Light intensity
Luminous intensity
Medicinal plants
Original Article
Pharmaceutical industry
Phenolic compounds
Phenols
Photosynthesis
Photosynthetic pigments
Phytochemicals
Pigments
Plant Genetics and Genomics
Plant Pathology
Plant Physiology
Plant Sciences
Plantlets
Urtica dioica
Wavelength
Wavelengths
Weight
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Summary:Urtica dioica L. (Urticaceae), popularly known as nettle, is a medicinal plant used by the textile, food and pharmaceutical industry. The aim of the current study is to evaluate the influence of different LED wavelengths and light intensity on the growth, phytochemical content and antioxidant activity of Urtica dioica grown in vitro. Nodal segments were taken to MS culture medium under 26, 51, 69, 94 and 130 μmol m −2  s −1 , and the following light spectra: blue, red, white, combinations of red and blue (1red/1blue, 2.5red/1blue and 1red/2.5blue) and cool white fluorescent lamps. Leaf area, photosynthetic pigments, total phenolics, total flavonoids and antioxidant activity were evaluated 40 days after culture implementation. Plantlets grown under 94 μmol m −2  s −1 showed better growth and dry weight production outcomes. Phenolic compound and flavonoid production, as well as antioxidant activity were intensified at 130 μmol m −2  s −1 . Plantlets grown under 1red/2.5blue produced 5.53 times more phenolic compounds and 8.63 times more flavonoids than plants under fluorescent lights. And dry weight accumulation was favored by wavelength of 2.5red/1blue. The antioxidant activity was influenced by the light intensity, being directly proportional to the increase in light intensity. Increased red light rate induced plantlet etiolation. Key message Different spectra and light intensity—altered growth and photosynthetic pigments, total phenolics, total flavonoids and antioxidant activity in plantlet of Nettle.
ISSN:0167-6857
1573-5044
DOI:10.1007/s11240-020-01992-2