. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. STRUCTURE OF THE PLAXT-CELL 7 chloroplasts, essentially similar in form to those just studied. In the simple tj'pes of plant-life [ among the Alga:-), however, the cells are often provided with but a single chloroplast or a Umited number of them, and these are frequently of a much more elaborate pattern. Spirogyra, which is exceedingly common in stagnant water, furnishes an extreme instance. The plant. Fig. 4.—Single cell of a Spirogyra fdameat showing the spiral chloroplast (ch.), the pyrenoids {p.) surr
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. STRUCTURE OF THE PLAXT-CELL 7 chloroplasts, essentially similar in form to those just studied. In the simple tj'pes of plant-life [ among the Alga:-), however, the cells are often provided with but a single chloroplast or a Umited number of them, and these are frequently of a much more elaborate pattern. Spirogyra, which is exceedingly common in stagnant water, furnishes an extreme instance. The plant. Fig. 4.—Single cell of a Spirogyra fdameat showing the spiral chloroplast (ch.), the pyrenoids {p.) surrounded by starch, and the nucleus (».) supported by cytoplasmic strands [si.). S, separating wall between adjacent cells. here consists of a single thread or filament composed of cylin- drical cells joined end to end. According to the species, each cell contains, apart from the cytoplasm and nucleus, one or more chloroplasts in the shape of green spiral bands, usually with a jagged edge (Fig. 4, ch.). These spiral chloroplasts are here, again, situated in the lining la3-er of cj'toplasm. At inter^-als bright bodies, consisting of protein ancl known as pyrenoids, are. 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 Fritsch, Felix Eugene, 1879-; Salisbury, E. J. (Edward James), Sir, b. 1886. London, G. Bell and sons ltd.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpl, booksubjectplants
