Effect of Wavelength and Light Intensity from Ultraviolet and Violet LEDs for Optimizing Vinblastine Production in the Leaves of Madagascar periwinkle

Taro Fukuyama, Tatsuki Hanyu, Rio Saito, Yasuo Fujikawa, Tomohiro Tsurumoto, Keiko Ohashi-Kaneko

Vinblastine accumulation in Madagascar periwinkle leaves is rapidly induced by ultraviolet A (UVA) irradiation. This study aimed to elucidate the effects of light quality and intensity (wavelengths between 280 and 405 nm) on vinblastine accumulation. In the first experiment, leaves were incubated for 5 d under light-emitting diodes (LEDs) with five distinct peak wavelengths: 280, 310, 365, 385, and 405 nm. Vinblastine accumulation was observed only in leaves treated with 365 and 385 nm LEDs. The leaves were irradiated for 5 d in the second experiment with eight light intensities between 1 and 150 W m-² from 365 and 385 nm LEDs. The vinblastine concentration was maximized at 25 or 50 W m⁻² using 385 nm LEDs. These findings suggest that the optimal light conditions for vinblastine production in periwinkle leaves using LEDs are irradiation with 385 nm LEDs at an intensity of 25 W m-² for 5 d.

HortTechnology

American Society for Horticultural Science

35

6

896

902

1943-7714

1943-7714

10.21273/HORTTECH05577-24