Indices for the Assessment of Glycoalkaloids in Potato Tubers Based on Surface Color and Chlorophyll Content

Abstract

Glycoalkaloids (GAs) are toxic to humans at higher concentrations. However, studies also suggest the health benefits of GAs depending on the dose and conditions of use. Methods that have been used to determine GA content in potato tubers are destructive and time-consuming and require skilled personnel and high-performance laboratory equipment. We conducted this study to develop indices for the prediction of the level of total GAs in potato tubers at different greening stages based on surface color readings and chlorophyll (Chl) development. Color values (Hunter L*, a*, b*, a*/b*), Chls (Chl a, Chl b, and total Chls) and GA (α-solanine, α-chaconine, and total GAs) content were measured from tubers of ‘Atlantic’ and ‘Trent’ potato cultivars at three-week intervals in up to six greening stages during the storage at room conditions (22 °C, 12-h shift of light-dark cycles). The results have revealed that greening, Chls, and GA content significantly increased for the two cultivars as the stage proceeded. The toxic level of GAs (>200 mg kg−1 FW) was accumulated at the late greening stages, accompanied by the highest Chl content. Finally, indices were developed based on surface color and Chl content for estimation of the safe GA levels for the consumption of the two commercially and commonly used potato cultivars. Moreover, the developed indices could be used as basic information to adapt to other potato cultivars.

Plant Triterpenoids Regulate Endophyte Community to Promote Medicinal Plant Schisandra sphenanthera Growth and Metabolites Accumulation

“…The whole plants of S. sphenanthera were dried in an oven at 55 • C for 24 h, and the dry weight of the plants was measured as biomass. To measure chlorophyll content, 200 mg of fresh leaf was extracted overnight in 8 mL of 80% (v/v) acetone, and absorbance at 645 and 663 nm was measured [42].…”

Effect of restricted grazing or feeding with total mix ration environments on the properties of milk quantity and quality from dairy cows of different genotypes

“…Changes in the Chl content (C) directly represent the photosynthetic capacity, growth and nutritional state of crops (Gonzalez-Dugo et al, 2015;Sonobe et al, 2021). Moreover, ChlC and growth conditions of potatoes are highly correlated, and Chl is an important index for measuring potato nutritional status (Tilahun et al, 2020). The rapid and accurate monitoring of ChlC is highly significant in the monitoring of the photosynthetic capacity and growth status of potatoes, and guides the improvement and optimization of potato yield and quality (Liu et al, 2020).…”

Nutritional and Antioxidant Value of Horticulturae Products

“…Tilahun et al [6] realized a study to develop indices to predict the level of total glycoalkaloids (GA) in potato tubers at different greening stages, because the toxicity and beneficial effects of glycoalkaloids depend on the dose and conditions of use. The indices were based on surface color and chlorophyll content for estimation of safe GA levels, which represents basic information that needs to be confirmed and thereafter adapted for use on all potato cultivars.…”