Effect of a photoselective filter on the yield and postharvest quality of 'Viroflay' baby spinach (Spinacia oleracea L.) leaves cultivated in a hydroponic system

Effect of blue, green or red LED light on the functional quality of spinach (Spinacia oleracea L.)

“…Spinach leaves showed biological activities that contribute to the anti-cancer, anti-obesity, hypogly-cemic, and hypolipidemic properties (33). Viroflay baby spinach grown under red photoselective filter reached higher phenolic compound content, foliar area, width, length and yield than control plants (25). In this same study, Viroflay baby leaves cultivated under blue filter showed significantly higher dry weight than those in red and gray filters (25).…”

“…The measurements were taken in the axial part of the distal sector of the leaf using a tristimulus compact colorimeter (Minolta Chroma meter, CM -2500d, Japan). The results were expressed as hue, chroma (C) and lightness (L) (25). The longest three leaves were measured from another five random plants per repetition (to limit the length).…”

“…The longest three leaves were measured from another five random plants per repetition (to limit the length). The measurements were made with a metric rule, where the maximum length and width were represented for the distance obtained from the base to the apex of the leaf above the midrib and the greatest distance perpendicular to the central rib of the leaf, respectively (25). The results were expressed in cm.…”

“…The results were expressed in cm. The fresh weight (FW), dry weight (DW) and dry weight percentage (%DW) were measured with a precision balance (Radwag, AS 100/C/2, Poland) (25). For the DW, the samples were dried in a freeze dryer (ilShinBioBase, FD5508, Korea) until reaching a constant weight.…”

“…The FW and DW were expressed in g per plant. The %DW was calculated as a quotient between DW and FW, expressed as g of DW in 100 g of FW (25).…”