. Practical text-book of plant physiology. Plant physiology. MYCORHIZAS 247 Note the degeneration of the shoot of Monotropa as a result of its altered nutritive relations (Fig. 125).1 Secure clumps of any species of Corcdlorhiza and wash away the soil. The coralloid underground organs are found to show inter- 0^-'-'- ^ ' lb™ Fig. 124. Longitudinal section of apical portion of mycorhiza of Corallorrhiza Ari- zonica. a, a, epidermis, m, m, mycelial layer of fungus, b, b, cortical region of- branch in which organs of interchange of the fungus are formed, c, stele, d, d, d, secondary branches, e,
. Practical text-book of plant physiology. Plant physiology. MYCORHIZAS 247 Note the degeneration of the shoot of Monotropa as a result of its altered nutritive relations (Fig. 125).1 Secure clumps of any species of Corcdlorhiza and wash away the soil. The coralloid underground organs are found to show inter- 0^-'-'- ^ ' lb™ Fig. 124. Longitudinal section of apical portion of mycorhiza of Corallorrhiza Ari- zonica. a, a, epidermis, m, m, mycelial layer of fungus, b, b, cortical region of- branch in which organs of interchange of the fungus are formed, c, stele, d, d, d, secondary branches, e, scale-leaf at apex of branch. nodes, and hence are stems, the roots having been lost as a result of the mycorhizal adaptation. Cut cross and longitudinal sections of some of the smaller branches. Note the tubular extensions of. A B C Fig. 125. Monotropa uniflora. A, longitudinal section of stele of root showing vessels and contiguous phloem cells. B, transverse sections through mature and young roots showing vessels. C, mass of roots from which arises a flowering shoot. 1 MacDougal and Lloyd. The roots and mycorhizas of some of the Monotropaceae. Bull. N. Y. Bot. Garden. 1 : No. 5. 419. 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 MacDougal, Daniel Trembly, 1865-1958. New York [etc. ] Longmans, Green, and Co.
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