Microgreens are young and tender leafy vegetables that have gained wider consumer acceptance. This is attributed to their low caloric composition and rich micronutrient and antioxidant composition. The present study investigated the bioactive composition and proximate analysis of fourteen microgreens belonging to Brassicaceae, Fabaceae, Pedaliaceae, Polygonaceae, Convolvulaceae, and Malvaceae. All the microgreens showed low calories (20.22 to 53.43 kcal 100 g−1) and fat (0.15 to 0.66 g 100 g−1), whilst mung bean and lentil microgreens showed considerable amounts of carbohydrate (7.16 g 100 g−1) and protein (6.47 g 100 g−1), respectively. Lentil microgreens had the highest total chlorophyll (112.62 mg 100 g−1) and carotenoid (28.37 mg 100 g−1) contents, whilst buckwheat microgreens showed the highest total phenolic content (268.99 mg GAE 100 g−1) and DPPH• scavenging activity (90.83 mM TEAC g−1). The lentil microgreens also presented high ascorbic acid content (128.70 mg 100 g−1) along with broccoli, Chinese kale, purple radish, and red cabbage microgreens (79.11, 81.33, 82.58, and 89.49 mg 100 g−1, respectively). Anthocyanin content was only detected in purple radish (0.148 mg CGE 100 g−1) and red cabbage (0.246 mg CGE 100 g−1). The results provide basic information and highlight the benefits of utilizing genetic biodiversity to obtain microgreens with the desired nutrients and antioxidants.

-Introduction.Anthocyanins are a group of flavonoids, and their synthesis is influenced by external and internal factors such as light, temperature, phytohormones and sugar concentration. A high anthocyanin concentration, which is related to redder coloration, is one of the factors of high-quality fruit. The effects of LED irradiation on the anthocyanin concentration and enzymatic and antioxidant activities in apple skin were studied. Materials and methods. Nine 8-year-old 'Tsugaru' apple trees (Malus domestica Borkh.) grafted onto Malling26 (M.26 EMLA) rootstocks planted in 45-L plastic pots covered with polyvinyl film (90% transmittance) and grown in a greenhouse were used. The effects of red or blue light-emitting diode (LED) irradiation on anthocyanin accumulation, the expression of Md-MYB10 and UDP-glucose-flavonoid 3-O-glucosyltransferase (MdUFGT) and superoxide anion radical (O − 2 ) scavenging activity in the skin of 'Tsugaru' apples were investigated under early heating cultivation in a greenhouse. Results and discussion. The anthocyanin concentrations in red LEDtreated apples were increased compared with those of the blue LEDtreated apples and the untreated control at 130 days after full bloom (DAFB). The relative expression of MdMYB10 and MdUFGT genes at 130 DAFB was also highest in the skin of apples treated with red LED light. The skin of apple fruits treated with red or blue LED light showed significantly low EC 50 values. Conclusion. These results suggest that red LED irradiation may be used in a controlled environment such as a greenhouse to increase the anthocyanin synthesis and antioxidant activity in apple skin.Keywords: Japan / apple / Malus domestica / light treatment / phenolics / secondary metabolism / fruit quality Résumé -Concentration en anthocyanes et activité anti-oxydante des pommes traitées aux diodes électrolu-minescentes (LED) en système de serre à environnement contrôlé. Introduction. Les anthocyanes sont un type de flavonoïdes dont la synthèse est influencée par des facteurs internes et externes tels que la lumière, la température, les phytohormones et la concentration en sucre. Une concentration en anthocyanes élevée, liée à la coloration rouge, est un des critères de grande qualité des fruits. Les effets de l'éclairage LED ont été étudiés sur la concentration en anthocyanes et sur les activités enzymatiques et anti-oxydantes dans la peau de la pomme. Matériel et méthodes. Neuf pommiers âgés de 8 ans (Malus domestica Borkh., cv. Tsugaru) greffés sur 'Malling 26' (M.26 EMLA) et plantés en pots de 45 L recouverts de film de vinyle (90 % de transmission) ont été cultivés en serre pour cette étude. Les effets d'un éclairage LED rouge ou bleu sur l'accumulation des anthocyanes, l'expression des enzymes MdMYB10 et UDPglucose-flavonoïde 3-O-glucosyltransférase (MdUFGT), et l'activité de piégeage du radical superoxyde (EC 50 ) dans la peau des pommes 'Tsugaru' ont été étudiés en culture sous serre au début de la période de chauffage. Résultats et discussion. Les concentrations...