. Elements of plant biology. Plant physiology. STRUCTURE 291 into the elongating region, increase actively in length by the formation and enlargement of the vacuole, and ler; & end. Fig. 47.—Diagrams illustrating the structure of the root, a, in longitudinal section. A, apical region; E, elongating region ; R, root-hair region; root cap ;, primary meristem; , vascular cylinder; ^;t;.,protoxylem; c, cortex; ^.?.,piliferouslayer; ,Toot hairs, b, part of vascular cylinder (the conjunctive tissue ot the cylinder is supposed to be transparent, the endodermis opaque), C, the same
. Elements of plant biology. Plant physiology. STRUCTURE 291 into the elongating region, increase actively in length by the formation and enlargement of the vacuole, and ler; & end. Fig. 47.—Diagrams illustrating the structure of the root, a, in longitudinal section. A, apical region; E, elongating region ; R, root-hair region; root cap ;, primary meristem; , vascular cylinder; ^;t;.,protoxylem; c, cortex; ^.?.,piliferouslayer; ,Toot hairs, b, part of vascular cylinder (the conjunctive tissue ot the cylinder is supposed to be transparent, the endodermis opaque), C, the same with endodermis removed; end., endodermis; per., pericycle; ph., phloem; px., protoxylem; mx., metaxylem. d, Dia- gram of cross-section of cylinder through origin of branch root; cori, endi, Xt, ,, , cortex, endodermis, xylem, primary meristem and root cap of branch root. On the left the primary meristem of the opposite branch is just formed in the pericycle. The root in b—d is tetrarch, with 4 xylem and 4 phloem strands. gradually become differentiated into the various tissues. The force of elongation of the cells in this region exerts. 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 Tansley, Arthur George, 1871-. London, George Allen & Unwin Ltd. ; New York, Dodd, Mead & Co
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplantph, bookyear1922
