Estimation of biological value of some species of mint (Mentha L.)



In 2006–2007 the studies aimed to compare the biological value of fresh herb of wrinkledleaf mint (Mentha crispa L.), water mint (Mentha aquatica L.) and three varieties of peppermint: bergamot mint (Mentha x piperita L. var. citrata Ehrh.), white peppermint (Mentha x piperita L. var. officinalis Sole f. pallescens Camus) and black peppermint (Mentha x piperita L. var. officinalis Sole f. rubescens Camus) were carried out. Content of dry matter, chlorophyll a, total carotenoids, total polyphenols and antioxidant activity (herb and oil) differed significantly in the species and varieties of mint tested in the experiment. Significantly higher content of dry matter was noted for bergamot mint (24.24%), chlorophyll a – for black peppermint (1574.83 mg∙kg-1 f.m.), total carotenoids – for wrinkled-leaf mint (431.98 mg∙kg-1 f.m.), total polyphenols – for water mint (450.25 mg∙100g-1 f.m.) and antioxidant activity – for black peppermint, water mint and wrinkled-leaf mint (on average 84.43%). Among species tested in the experiment the highest antioxidant activity of the essential oil was assessed for wrinkled-leaf mint (29.78%). Key words: Mentha crispa, Mentha aquatica, Mentha x piperita, biological value, antioxidant activity
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