Abstract
Growth and nutraceutical quality of perilla sprouts is strongly dependent on planting density. This study explored the influence of planting density on growth, photosynthetic parameters, antioxidant capacity, main secondary metabolites, soluble sugar and soluble protein contents of ready-to-eat sprouts. Planting at a density of 1450 plants m−2 significantly increased yield, improved the activities of antioxidant enzymes SOD and CAT, enhanced the generation of reactive oxygen species, increased the content of total chlorophyll and net photosynthetic rate, and decreased the content of MDA in perilla sprouts. The content of flavonoids, volatile oil, soluble sugar and soluble proteins was highest when the density was 1450 plants m−2 compared to other groups. The relative contents of RA and anthocyanin in perilla sprouts reached the maximum value at planting density of 1887 plants m−2.
Highlights
Sprouts are parts of plants that grow from planted seeds or other plant organs
The highest plant height was noted in T4 treatment, which exceeded that of T1, T2, T3 and T5 by 60.37, 42.43, 28.30, and 15.06%, respectively (Fig. 1a)
Our results show that total chlorophyll content, net photosynthetic rate and intercellular CO2 concentration reached the maximum levels under T3 treatment
Summary
Sprouts are parts of plants that grow from planted seeds or other plant organs. Sprouts are extensively used as short growth cycles, source of nutritious compounds or simple cultivation methods to enhance the nutritional and functional quality of cereals, pseudo cereals, cruciferous vegetables and legumes[1]. Single density planting is adopted, which does not effectively yield perilla sprouts of with high quality. Studies show that germinating seeds produce high phenolic content and antioxidants[5]. Few studies have explored the effect of planting density on nutritional quality and antioxidant level of perilla sprouts. We explored the influence of planting density on growth, photosynthetic parameters, antioxidant capacity, main secondary metabolites, soluble sugar and soluble protein contents of ready-to-eat sprouts. The aim of this experimentation was to test the hypothesis that planting density would affect yield and expression of quality traits in perilla sprouts
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