. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. o s^^n 80, ^ ,1,1,, o to a o ^ Fig. 77. — Fucus vesiculosus. Fusiform and rod-shaped plastids (pi) with mito- chondria im) and fucosan granules () in Fucus vesiculosus. 1, apical cell; 2, two celled embryo. N, nucleus. Regaud's method. (After Mangenot) . mosing to form a network, together with small chondriosomes. In those portions of the thallus containing little chlorophyll (Fig. 78, Ii and lower portion of A), these elements grow thinner and appear somewhat like chondrioconts. In the rhizoids (F
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. o s^^n 80, ^ ,1,1,, o to a o ^ Fig. 77. — Fucus vesiculosus. Fusiform and rod-shaped plastids (pi) with mito- chondria im) and fucosan granules () in Fucus vesiculosus. 1, apical cell; 2, two celled embryo. N, nucleus. Regaud's method. (After Mangenot) . mosing to form a network, together with small chondriosomes. In those portions of the thallus containing little chlorophyll (Fig. 78, Ii and lower portion of A), these elements grow thinner and appear somewhat like chondrioconts. In the rhizoids (Fig. 78, I2), in which neither chlorophyll nor phycoerythrin exists, the plastids become very small and look so like the inactive chondriosomes that it becomes impossible to tell them apart. The trichogyne and other cells of the carpogonial branch (Fig. 78, A) develop from an ordinary cell of the thallus containing large rhodoplasts. A regres- sion of chlorophyll and of phycoerythrin may be observed in these cells. The plastids lose their color and are transformed into small rods becoming like the chondriosomes which are present with them in the cell. Then the carpogonium shows a chondriome in which all distinction between plastids and chondriosomes is impossible. This chondriome persists in the first cells of the gominoblast fila-. 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 Guilliermond, Alexandre, 1876-; Atkinson, Lenette May Rogers, 1899-. Waltham, Mass. , Chronica Botanica Company
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Keywords: ., bookcentury1900, bookcollection, booksubjectplantcellsandtissues
