. Elements of plant biology. Plant physiology. 292 THE ROOT a push up and down the root. The region behind the elongating region is held fast in the soil by the roqt hairs, but the root apex, covered by the root cap, is. Fig. 48.—Cross-section of a small root taken in the root-hair region : , root hairs; , piliferous layer; cor., cortex; e, endodermis; per.,-peticyci^; px., protoxylem; »;tr., metaxylem; ^A,.phloem (;., sieve tube; , companion cell). This root is diarch, with 2 xylem strands, joined to form a plate, and 2 phloem strands. pushed between the particles of soil
. Elements of plant biology. Plant physiology. 292 THE ROOT a push up and down the root. The region behind the elongating region is held fast in the soil by the roqt hairs, but the root apex, covered by the root cap, is. Fig. 48.—Cross-section of a small root taken in the root-hair region : , root hairs; , piliferous layer; cor., cortex; e, endodermis; per.,-peticyci^; px., protoxylem; »;tr., metaxylem; ^A,.phloem (;., sieve tube; , companion cell). This root is diarch, with 2 xylem strands, joined to form a plate, and 2 phloem strands. pushed between the particles of soil, its passage being lubricated by the mucilaginous surface of the cap. Internal Structure.^-A cross - section of the root taken in the naiddle of the root-hair region gives the best idea of the primary plan of construction of the root. On the surface is the piliferous layer (Fig. 48,^.Z.),. 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
