Table 1

Influence of reduced light levels by increasing copper sulfate concentration in the spectral filter on plant height, number of leaves, itnernode length and stem elongation rate of chrysanthemum plants. Control (water) filter grown plants were shaded by cheese cloth to match the light levels in both control and corresponding copper sulfate filter. 

CuSO4 conc. Shading (%)
Plant height (cm) Number of leaves Internode length (cm) Stem elongation rate (cm per week)
0 26 24.4 a 17 a 1.5 a 4.2 a
36 24.8 a 17 a 1.5 a 4.2 a
47 24.1 a 17 a 1.4 a 3.9 a
4 26 16.1 b 16 b 1.0 b 2.2 b
8 36 14.4 c 15 b 0.9 b 1.7 c
16 47 15.2 c 15 b 1.0 b 1.8 c
Means with same letter (within a column) are not significantly different.