Figure 5
Relative growth response of basil, petunia, and tomato. Relative growth of basil (green symbols and regression lines), petunia (purple symbols and regression lines), and tomato (red symbols and regression lines) under various glazing materials with different spectral characteristics. The transmission spectra for the different glazing materials are given in Fig. 2. Each growth parameter is relative to the average value of the control treatment according to species and represents the average of ten samples. (a) Relative yield refers to basil and petunia shoot dry mass (leaves and stems) and tomato fresh fruit mass. (b) Specific leaf area (SLA) was calculated by dividing leaf area (cm2) by leaf mass. (c) SPAD reflects the relative chlorophyll concentration of leaves. (d) Stem length was measured from the substrate surface to the apical meristem. (e) Stem diameter was measured at the substrate surface. (f) Compactness was calculated by dividing the total above-ground dry mass (g) by stem length (cm).
