On the influence of ray of different wave-length upon the assimilation of Hydrilla verticillata and on the growth as well as the chemical composition of Pisum satrvum

The conclusion may be summarised as follows. 1) Assuming the assimilative action of carbon is proportional to the amount of the evolved gas, the activity under different rays makes following ratio; red (λ=640-715μ.μ.) 100, green (λ=520-595μ.μ.) 16.8, blue (λ=340-515μ.μ.) 27.3. This ratio corresponds very well to the absorbed amount of ray by the chloroyhyll. 2) Inhibitory effect of the different rays upon the growth of the length of stem is also proportional to the absorbed amount of ray by chlorophyll i.e. red>blue>green. 3) These rays have no influence upon the growth of root, which contains no chlorophyll. 4) The formation of chlorophyll is proportional to the absorbed amount of ray i.e. ren>blue>green. 5) The amount of water of plant under different rays is reversed proportional to the absorbed amount of ray i. e. red