Narrow-Band Light-Emitting Diodes (LEDs) Effects on Sunflower (<i>Helianthus annuus</i>) Sprouts with Remote Monitoring and Recording by Internet of Things Device

Abstract

Previous studies have demonstrated that light quality critically affects plant development and growth; however, the response depends upon the plant species. This research aims to examine the effects of different light wavelengths on sunflower (Helianthus annuus) sprouts that were stimulated during the night. Natural light and narrow-band light-emitting diodes (LEDs) were used for an analysis of sunflower sprouts grown under full light and specific light wavelengths. Sunflower seeds were germinated under different light spectra including red, blue, white, and natural light. Luminosity, temperature, and humidity sensors were installed in the plant nursery and remotely monitored and recorded by an Internet of Things (IoT) device. The experiment examined seed germination for seven days. The results showed that the red light had the most influence on sunflower seed germination, while the natural light had the most influence on the increase in the root and hypocotyl lengths.

Keywords

• narrow-band light-emitting diodes (LEDs)
• sunflower (<i>Helianthus annuus</i>) sprouts
• Internet of Things (IoTs) device
• germination
• sigmoidal growth curves