. The elements of structural botany [microform] : with special reference to the study of Canadian plants : to which is added a selection of examination papers. Plant anatomy; Botany; Botanique; Botanique. 'i TIIK CKLL. 1 59 \mg a. granular appearance, and in tlie centre of each a rounded denser portion may be made out, each of these again enclosing one or more smaller bodies. Tliis licjuid which thus fills the newly-formed cells is csi\\ed2^rotoplatS7}i; the large rounded central mass is the nucleus^ consist- ing of denser protoplasm, and the smaller enclosed masses are the nucleoli. * Now let
. The elements of structural botany [microform] : with special reference to the study of Canadian plants : to which is added a selection of examination papers. Plant anatomy; Botany; Botanique; Botanique. 'i TIIK CKLL. 1 59 \mg a. granular appearance, and in tlie centre of each a rounded denser portion may be made out, each of these again enclosing one or more smaller bodies. Tliis licjuid which thus fills the newly-formed cells is csi\\ed2^rotoplatS7}i; the large rounded central mass is the nucleus^ consist- ing of denser protoplasm, and the smaller enclosed masses are the nucleoli. * Now let us consider Fig. 219. This is a representation of a section of the same rootlet, taken a little farther back from the point, so that the cells now in view are a little older than the first ones. They are manifestly larger ; that is to say, they have grown. The nucleus and the nucleoli can still be made out in some of them, but the protoplasm no longer entirely fills the cell. There are now transparent spaces (vacuoles) which are filled with water, and between these the piotoplasni is seen in the form of strings or bands, as well as lining the cell. The water has been absorbed through the cell-wall, and after saturating the protoplasm the excess has formed the \ acuoles. Fig. 218.—Yoiinj,' cells filled with protoplasm (i>); b, coll wall ; h, nucleus ; IcJc, nucleolus. (Sachs.) Fig. 219.—Cells a little older, exhibitingf vacuoles («). (Sachs.). 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 Spotton, H. B. (Henry Byron), 1844-1933. Toronto : W. J. Gage
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Keywords: ., book, bookcentury1800, booksubjectbotany, booksubjectplantanatomy
