Growth and bioactives content of Dendrobium friedericksianum Rchb.f. under artificial lights and development of edible coating from an extract

Abstract

    The purpose of this research was to study the growth and bioactive compounds of one-year-old Dendrobium friedericksianum Rchb.f. cultured under different LEDs light conditions. The pseudobulb of orchid extracts was used to study edible coatings. No significant differences of plant height and diameter were found when culturing under different LEDs light conditions for 6 months. The analysis of bioactive compounds from the pseudobulb of Dendrobium friedericksianum Rchb.f. incubated under different light conditions for 7 months  found that the IC₅₀ value of extract of orchid grown under purple light was statistically significantly lower than that of other light colors, corresponding to the total phenolic content of orchid extracts and the total flavonoid content from the orchids extracts from the purple light cultured. The results for culturing orchids under the LEDs to control the required amount of active ingredient were generally better compared to the natural planting. Edible coatings were studied from orchid extracts with the objective of finding ways to delay changes in quality and to extend the shelf life of Kluai Khai and lime. It was found that there were no significant differences for the application of coating agent to delay the color change of Kluai Khai and lime, and delay changes in firmness, sweetness, pH value and the acid content of Kluai Khai. This information provides guidelines for further development of Kluai Khai and lime of coating formulations in future.