. Botany for high schools and colleges. Botany. OBLOBOPHTLL. 51 68.âWith few exceptions chlorophyll is not found in cells which are not exposed to the action of light.* When ordi- nary green plants are removed for some time from the light, the chlorophyll disappears from the chlorophyll-bodies, and leaves them colorless. The same decoloration also takee place when a plant is deprived of iron as one of the constituents of its food. The disappearance of chlorophyll takes place normally in higher, plants when the cells lose their activity. In the case of leaf- cells, upon the approach of autumn t
. Botany for high schools and colleges. Botany. OBLOBOPHTLL. 51 68.âWith few exceptions chlorophyll is not found in cells which are not exposed to the action of light.* When ordi- nary green plants are removed for some time from the light, the chlorophyll disappears from the chlorophyll-bodies, and leaves them colorless. The same decoloration also takee place when a plant is deprived of iron as one of the constituents of its food. The disappearance of chlorophyll takes place normally in higher, plants when the cells lose their activity. In the case of leaf- cells, upon the approach of autumn the chlorophyll appears to be re- moved to other portions of the plant. (a) The cells of many Palmellacem, and manv zoosporesâp,.p., of (Bdogo- nium and Vaucheriaâfurnish good ex- amples of the coloration of nearly the whole body of protoplasm. In Zygnemaths chlorophyll-bodies are stellate, and in Spirogyni, spiral. In Yaueheria there are multitudes of roundish or slightly angular chlorophyll- bodies, which line the interior of the large cells. The chlorophyll in the leaves of many mosses may he easily studied, even without making sections ; in them the chlorophyll-bodies are round- ish in outline. In the higher plants thin cross-sections of the leaves afford the best means for the examination of their chlorophyll-bodies, which are uniformly rogfm longata: the chloroplfyH .'^ â 1 1 i,. "^ IS lu spiral bands ; m the centre of a Simple rounded outline. of each cell is a nucleus, with (J)'Chlorophyll is'soluble in alcohol, '^'^gl'o'.^-Afterslchf P''°'°P'*â¢- ether, chloroform, benzine, essential and fatty oils, hydrochloric and sulphuric acids, and these may be used. Fig 43.âTwo filaments of Spi- * The cotyledons, of many Coniferae acquire a green color even in total darkness. The embryo of PTioradendron is green in the unopened seed,,and in certain seeds with thick coats, which are impervious to light {, in some GucurbttcicecE), a chlorophyll-bearing layer of
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