Effect of hydroponic nutrient composition and the barley variety on saponarin production under white LED

초록

This study investigates the effect of nutrient composition and barley cultivars on saponarin production in young barley leaves (YBL) under low-intensity white LED light. Various treatments involving K2HPO4, NaCl, and salicylic acid (SA) were evaluated to be under 6500 K light with 210 PPFD. Among different nutrient combinations, 600 mg L-1 K2HPO4 with 0.1% NaCl significantly enhanced saponarin concentration (12.3 g kgdw -1) and total saponarin amount per plant (150 μg plant-1). In addition, the effects of light intensity on saponarin production were also examined across six barley cultivars, and the high light intensity (500 PPFD) notably increased total saponarin amount (212 μg plant-1) in Keunal-bori than Hyenuri cultivars. Otherwise, Hyenuri cultivar showed the highest total saponarin amount (114 μg plant-1) at low light intensity (100 PPFD), as well as the highest electricity efficiency (201 mg kWh-1). These findings provide valuable insights into optimizing cultivation conditions for each cultivar in plant factories to maximize saponarin production while balancing energy consumption and metabolic efficiency.

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