Phenotypic Plasticity of Cunninghamialanceolata (Lamb.) Hook. Seedlings in Response to Varied Light Quality Treatments

Effects of light quality on phenotypic plasticity in Cunninghamialanceolata (Lamb.) Hook. seedlings during growth and development, the underlying mechanisms, were investigated. The showed distinct morphological adjustments when exposed to an equal photosynthetic photon flux density (400 μmol·m−2·s−1) different qualities: monochromatic blue (BL), red (RL), far-red (FrL), mixed RL FrL at 1:1 (RFr1:1L), 1:2 (RFr1:2L), multi-wavelength white (WL, control). Compared with WL, BL significantly promoted height increment. However, was unfavorable for root growth. seedling biomass lower root-to-shoot ratio smaller under BL. leaf area enlargement, growth, axillary bud number, increased ratio, but inhibited stem elongation. Low R/Fr ratios or proportion RFr1:1L treatment poorer than that other treatments; however, number buds highest. morphology traits treatments, crucial adaptation C. lanceolata quality. Precise management wavelength controlled environments may maximize economic efficiency forest production enhance its