. An introduction to vegetable physiology. Plant physiology. 0 ii -to ixa 30 I rib 50i ttu 70 so j 00 J/00 ' I ii 1 I I !i II i I! i I I I i. i a m Pig. 130 TV V M -Absoeption Spectra of Chlorophyll and Xanthophyll. (After Kraus.) energy actually absorbed during bright sunshine is at once devoted to this purpose. When we speak of radiant energy we must remember that the rays of the visible spectrum do not supply all the energy which the plant obtains. It has been suggested by several botanists with considerable plausibility that the ultra-violet or chemical rays can be absorbed and utilised by
. An introduction to vegetable physiology. Plant physiology. 0 ii -to ixa 30 I rib 50i ttu 70 so j 00 J/00 ' I ii 1 I I !i II i I! i I I I i. i a m Pig. 130 TV V M -Absoeption Spectra of Chlorophyll and Xanthophyll. (After Kraus.) energy actually absorbed during bright sunshine is at once devoted to this purpose. When we speak of radiant energy we must remember that the rays of the visible spectrum do not supply all the energy which the plant obtains. It has been suggested by several botanists with considerable plausibility that the ultra-violet or chemical rays can be absorbed and utilised by the protoplasm without the intervention of any pigment such as chlorophyll. There is some evidence pointing to this power in the cells of the higher plants. Certain bacteria also construct organic material from simple com- pounds of nitrogen and carbon dioxide, though it is not probable that they utilise radiant energy Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Green, J. Reynolds (Joseph Reynolds), 1848-1914. Philadelphia, P. Blakiston
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