Abstract
Rice plants (cv. Nipponbare) were grown under 100% red light (R100) or under mixed light of 80% red and 20% blue (R80B20) of 460 µmol m-2 s-1 PPFD, and blue light mixing effects on growth and nitrogen allocation to each organ were examined.
There were no significant differences in plant dry weight and leaf area between the two light treatments. Plant reduced-N content was greater in R80B20 than that in R100. There was no significant difference in the ratio of reduced-N allocated to each organ to plant reduced-N between the two light treatments. Leaf reduced-N content per unit area was higher in R80B20 than that in R100. Plant reduced-N content and leaf reduced-N content per unit area in the plants grown with a lower N concentration were also greater in R80B20 than those in R100.
These results suggested that blue light mixing promoted the uptake of nitrogen in rice plants.
