Effects of light emitting diode (LED) on the mycelial biomass and antioxidant activity of Lentinus tigrinus and Lentinus sajor-caju [manuscript]
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Date
2018
Authors
Joyce Ann F. Salazar
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Abstract
Light is one of the most important environmental factors influencing mushroom quality including nutrient content as well as the effects on growth and development. In this study, the effect of three different colors of light emitting diode (LED) such as red, green, and blue light and other illumination conditions on the mycelial biomass of L. tigrinus and L. sajor-caju were evaluated. The highest yield of mycelial biomass and highest antioxidant activity were the basis of determining the best illumination condition. In addition, the effects of different incubation periods under the best LED on the mycelial biomass and antioxidant activities of these mushrooms were also investigated.
Flourescent light is the best illumination condition for L. tigrinus mycelial biomass prouduction (0.32g). Moreover, this is comparable with red and blue LED. In terms of volume loss, flourescent light recorded the highest volume loss spent (16.40 ml/50ml). The alternating light and dark condition recorded the highest percentage (86.64%) while blue LED had the highest scavenging activity among the three color of LEDs (84.52%). Blue LED was considered as the best LED and was used in the mycelia incubated for 19 days produced the highest mycelial dry weight of L. tigrinus (0.26 g). The mycelia grown for 16 days showed the highest DPPH radical scavenging activity (84.91%).
Moreover, red LED is the best illumination condition for L. sajor-caju mycelial biomass production (0.30g) and produced the highest volume loss (13.20ml/50ml). on the other hand, blue LED recorded the highest percentage of radical scavenging activity (78.08%) and considered as the best LED used in the mycelia incubated for 19 days that produced the highest mycelial dry weight of L. sajor-caju as well as the highest DPPH radical scavenging activities.