Abstract
Background: Cruciferous sprouts (Brassicaceae) are rich in glucosinolates (GSL) as health-promoters involved in the prevention and modulation of different pathological conditions. Only recently has the use of LEDs been implemented in food production in order to reduce energy costs and to facilitate soil-less systems for producing edible sprouts. The aim of this research was to obtain cruciferous sprouts enriched in bioactive compounds (GSL) by means of soil-less production using LEDs and Methyl-Jasmonate as elicitors. Methods: Seeds of broccoli, red radish, red cabbage, and white mustard varieties for sprouting, were sanitized (2 h) and water imbibed (22 h) before sowing and growing in the dark (2 d). The 3-day old sprouts were transferred to growth chamber under 18/6 h photoperiod, with controlled relative humidity (60/80%) and LED lights (Experimental vs. Commercial) with spraying Methyl-Jasmonate (250 µM) as elicitor. The germination efficiency, biomass production, and GSL contents were analysed. Results: The LED treatments affected the fresh biomass production. The GSL analysis revealed qualitative differences and suggested the potential of using spe specific GSL as markers of every variety: glucoraphanin in broccoli; Dehydro-Erucin in radish; hydroxybenzyl-GLS in mustard, and glucoerucin in red cabbage. The combination of LED lighting and MeJA is a promising tool for increasing GSL contents in sprouts, rendering healthier fresh foods or ingredients for functional products.
Highlights
Nowadays, there are numerous non-communicable diseases challenging public health systems worldwide including obesity, diabetes, chronic pain and inflammation, as well as different types of cancer [1,2]
The use of LED for the development of cruciferous sprouts and microgreens has been incorporated to food production systems in the last few years in order to facilitate development in a more sustainable way than common food production practices and has in mind the needs for the future of food security of being able to produce fresh foods in urban environments and in agri-food areas without increasing the use of soils or irrigation water, and improving the nutritive and phytochemical content of the sprouts and microgreens produced under LED lighting conditions [6]
Taking into consideration all these premises we have planned the development of cruciferous sprouts in hydroponics elicited with LED lighting and Methyl-Jasmonate (MeJA) to bio-stimulate the production of glucosinolates comparing the effects of two types of LEDS designed for indoor food production systems, with the aim to gain knowledge on the response by means of performance and phytochemical composition of fresh edible sprouts of cruciferous varieties under these conditions for future food production recommendation
Summary
There are numerous non-communicable diseases challenging public health systems worldwide including obesity, diabetes, chronic pain and inflammation, as well as different types of cancer [1,2]. Taking into consideration all these premises we have planned the development of cruciferous sprouts in hydroponics elicited with LED lighting and Methyl-Jasmonate (MeJA) to bio-stimulate the production of glucosinolates comparing the effects of two types of LEDS (commercial vs experimental) designed for indoor food production systems, with the aim to gain knowledge on the response by means of performance (germination rate, biomass yield) and phytochemical composition of fresh edible sprouts of cruciferous varieties (broccoli, radish, cabbage and mustard) under these conditions for future food production recommendation. The aim of this research was to obtain cruciferous sprouts enriched in bioactive compounds (GSL) by means of soil-less production using LEDs and Methyl-Jasmonate as elicitors. The combination of LED lighting and MeJA is a promising tool for increasing GSL contents in sprouts, rendering healthier fresh foods or ingredients for functional products
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