By a News Reporter-Staff News Editor at Life Science Weekly -- Research findings on Biology are discussed in a new report. According to news reporting out of Vilnius, Lithuania, by NewsRx editors, research stated, "This study examines the effect of irradiance level produced by solid-state light-emitting diodes (LEDs) on the growth, nutritional quality and antioxidant properties of Brassicaceae family microgreens. Kohlrabi (Brassica oleracea var. gongylodes, 'Delicacy Purple') mustard (Brassica juncea L., 'Red Lion'), red pak choi (Brassica rapa var. chinensis, 'Rubi F-1') and tatsoi (Brassica rapa var. rosularis) were grown using peat substrate in controlled-environment chambers until harvest time (10 days, 21/17A degrees C, 16 h)."
Our news journalists obtained a quote from the research from Vilnius State University, "A system of five lighting modules with 455, 638, 665 and 731 nm LEDs at a total photosynthetic photon flux densities (PPFD) of 545, 440, 330, 220 and 110 A mu mol m(-2)s(-1) respectively were used. Insufficient levels of photosynthetically active photon flux (110 A mu mol m(-2) s(-1)) suppressed normal growth and diminished the nutritional value of the Brassica microgreens studied. In general, the most suitable conditions for growth and nutritional quality of the microgreens was 330-440 A mu mol m(-2) s(-1) irradiation, which resulted in a larger leaf surface area, lower content of nitrates and higher total anthocyanins, total phenols and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free-radical scavenging capacity."
According to the news editors, the research concluded: "High light levels (545 A mu mol m(-2) s(-1)), which was expected to induce mild photostress, had no significant positive impact for most of investigated parameters."
For more information on this research see: LED irradiance level affects growth and nutritional quality of Brassica microgreens. Central European Journal of Biology, 2013;8(12):1241-1249. Central European Journal of Biology can be contacted at: Versita, Solipska 14A-1, 02-482 Warsaw, Poland. (Springer - www.springer.com; Central European Journal of Biology - www.springerlink.com/content/1895-104x/)
Our news journalists report that additional information may be obtained by contacting G. Samuoliene, Vilnius State Univ, Inst Appl Res, LT-10222 Vilnius, Lithuania. Additional authors for this research include A. Brazaityte, J. Jankauskiene, A. Virsile, R. Sirtautas, A. Novickovas, S. Sakalauskiene, J. Sakalauskaite and P. Duchovskis (see also Biology).
Keywords for this news article include: Europe, Vilnius, Biology, Lithuania
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