Sensory quality and mineral and glycoalkaloid concentrations in organically and conventionally grown redskin potatoes (Solanum tuberosum)

Summary

This study examined whether sensory panellists could distinguish organically from conventionally grown redskin potatoes and investigated associated differences in mineral and glycoalkaloid composition. Panellists detected significant sensory differences between organic and conventional potatoes when skin was present, but not when peeled or between organic treatments differing in compost application. Organic potatoes exhibited higher concentrations of potassium, magnesium, phosphorus, sulphur, and copper, whilst conventional potatoes showed elevated iron and manganese in skin; glycoalkaloid levels were also higher in organic samples.

Regional applicability

The study origin is not explicitly stated in the abstract, though it appears to be North American research. The findings on mineral composition differences between production systems are likely transferable to United Kingdom potato cultivation, though UK growing conditions, soil types, and certified organic standards may produce somewhat different results. Direct sensory panel results would require replication in UK contexts.

Key measures

Triangle test discrimination; potassium, magnesium, phosphorus, sulphur, copper, iron, and manganese concentrations in tuber skin and flesh; glycoalkaloid levels

Outcomes reported

The study compared sensory perception (via triangle taste tests) and mineral and glycoalkaloid concentrations in potato tubers grown using organic (with and without compost) versus conventional production methods. Panellists' ability to discriminate between treatments and chemical composition of skin and flesh were measured.

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