Environmental Control in Biology
Online ISSN : 1883-0986
Print ISSN : 1880-554X
ISSN-L : 1880-554X
Original Paper
Effect of Monochromatic Red Light of Different Intensities during Growth on Production Efficiency of Vinblastine in Catharanthus roseus with Ultraviolet A Light Irradiation
Taro FUKUYAMATakatoki OKUSUHiroyuki WATANABEKeiko OHASHI-KANEKO
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2023 Volume 61 Issue 2 Pages 29-36

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Abstract

 This study aimed to evaluate that the effect of the biomass and the vinblastine precursor concentrations in Catharanthus roseus before ultraviolet A (UV-A) light irradiation on vinblastine accumulation in the leaves for commercial vinblastine production in a plant factory with artificial light (PFAL). C. roseus seedlings were cultivated under monochromatic red lights with different photosynthetic photon flux densities of 150 (low) and 300 (high) μmol m-2 s-1 for 28 d and then were irradiated 5 W m-2 UV-A light with monochromatic red lights with their different intensities for 5 d. The leaves dry weight was higher in high intensity treatments compared to low intensity treatments. After UV-A irradiation, the vinblastine concentration were approximately two times higher in the low intensity treatment than in the high intensity treatment. However, the vinblastine yield, a product of leaves dry weight and vinblastine concentration, did not have the great difference between the low and high intensity treatments. This study suggested that a suitable method to produce vinblastine using the PFAL was to apply the low intensity of monochromatic red light before UV-A light irradiation because the light use efficiency of vinblastine production was higher in the low intensity treatment than in high intensity treatment.

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© 2023 Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists
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