Ultraviolet-B radiation suppressed the growth and anthocyanin production of Perilla plants grown under controlled environments with artificial light.

摘要

Perilla (Perilla frutescens Britt.) plants with red colored leaves were grown under ultraviolet-B radiation (UV-B) of 0, 0.21, and 0.88 W m-2 at a constant photosynthetic photon flux of 200 micro mol m-2 s-1 provided by UV-B and fluorescent lamps, and an irradiation period of 16 h d-1. The leaf dry weight and leaf area of the plants were 19-23% and 14-19% smaller, and the concentration of anthocyanin (mg g-1 leaf DW) was 17-18% lower with UV-B than without, respectively. The concentrations of perillaldehyde and limonene (mg g-1 leaf DW), and the number of true leaves were not affected by the UV-B. The UV-B suppressed the growth and anthocyanin production, but had no effect on the concentrations of essential oil components in leaves of the plants.