Interaction effect of artificial light spectra and sulfur nutrition on morphology, photosynthetic pigments and nutritional value of broccoli microgreens (Brassica oleracea var. italica )

Microgreens are considered a functional food that can be so useful for increasing the health level of society. This experiment was conducted in factorial format based on a completely randomized design with two factors. The first factor, light spectrum, was investigated at four levels, and the second factor, sulfur nutrition, at two levels (۰ and ۶۰ mg/liter). The light treatments included different ratios of red (R) and blue (B) light (R۱B۲, R۱B۱, R۲B۱, and R۳B۱). The highest leaf length was recorded in the R۳B۱ treatment without sulfur feeding, which was significantly higher than all other treatments used. The length of the stem in the combined treatment of R۳B۱ with sulfur feeding showed the highest figure. The highest amount of total chlorophyll was obtained in R۱B۲ treatment with sulfur feeding, although their difference with R۳B۱ treatment with sulfur feeding and R۲B۱ without sulfur feeding was not statistically significant. In carotenoid pigment, the highest amount was seen in R۲B۱ treatment without sulfur, which did not show a significant difference with R۱B۲ without sulfur feeding. The total antioxidant activity showed the highest value in R۳B۱ treatment without sulfur, and its difference was not significant between R۱B۱ treatment without sulfur and R۱B۱ with sulfur feeding. The maximum calculated phenol was recorded in R۲B۱ treatment without sulfur, which was not significantly different from R۱B۲ treatment without sulfur and R۳B۱ with sulfur feeding. The most flavonoids were obtained in the R۱B۲ treatment without sulfur feeding, which was significantly more than all other treatments. Since the high proportion of red light in conditions without sulfur nutrition caused proper morphological growth and also increased the antioxidant capacity of the plant, therefore the mentioned treatment is recommended for the production of broccoli microgreens under artificial light.

کلیدواژه ها:

Light quality ، Antioxidant ، Phenol ، Flavonoid ، Chlorophyll ، کیفیت نور ، آنتی اکسیدان ، فنل ، فلاونوئید ، کلروفیل