Responses of Favorita Potato Plantlets Cultured in Vitro under Fluorescent and Light-Emitting Diode (LED) Light Sources

Abstract

The effects of different light-emitting diodes on the growth, morphogenesis, and tuberization of ‘Favorita’ potato (Solanum tuberosum L.) plantlets were determined. Shoot cuttings were cultured in vitro for 21 days under six different light types: fluorescent lamp, 100% red LED, 100% blue LED, and three blue and red LED combinations (80R/20B, 70R/30B, 50R/50B). Plant height was the greatest under 100R LED, whereas root length and fresh weight were the greatest under 80R/20B LED. Chlorophyll content and total soluble carbohydrate content were greatest when R LED was combined with at least 30% B LED. Carotenoid content and average weight of tubers were the greatest when both R and B LED were present. The diameter of the biggest tuber was the greatest under 70R/30B LED. Under 100% R, single tubers had the least average weight, while other treatments showed no significant difference. In conclusion, 70R/30B LED is best for growing Favorita potato plantlets in vitro.