Estimation of Glucosinolates and Anthocyanins in Kale Leaves Grown in a Plant Factory Using Spectral Reflectance

The spectral reflectance technique for the quantification of functional components was applied in different studies crops, but related research on kale leaves is limited. This study conducted to estimate glucosinolate and anthocyanin cultivated a plant factory based diffuse spectroscopy through regression methods. Kale grown under treatments. After specific periods transplantation, leaf samples were collected, spectra measured immediately from nine points each leaf. same freeze-dried stored analysis components. Regression procedures, such as principal component (PCR), partial least squares (PLSR), stepwise multiple linear (SMLR), relate with data. In laboratory analysis, progoitrin glucobrassicin, well cyanidin malvidin, found be dominating glucosinolates anthocyanins, respectively. From overall SMLR model showed better performance, identified wavelengths estimating anthocyanins early near-infrared (NIR) region. Specifically, at 742, 761, 787, 796, 805, 833, 855, 932, 947, 1000 nm strong correlation.