. A textbook of botany for colleges and universities ... Botany. Figs. 1106, 1107. â Endotrophic mycorhiza of orchid roots: 1106, a cross section through a part of a root of Aplectrum hyemale, showing dense clumps of fungal hyphae (/) in some of the larger cortical cells, several rows inside of the epidermis (e); f, root hairs; v, vas- cular tract; 1107, a single cortical cell from the root of Spiranthes cernua, showing fungal strands (/), cyto- plasm (c), and the nucleus («); 1106 considerably, and 1107 highly magnified. for example, hyphae from the fungal sheath invade and modify the epider
. A textbook of botany for colleges and universities ... Botany. Figs. 1106, 1107. â Endotrophic mycorhiza of orchid roots: 1106, a cross section through a part of a root of Aplectrum hyemale, showing dense clumps of fungal hyphae (/) in some of the larger cortical cells, several rows inside of the epidermis (e); f, root hairs; v, vas- cular tract; 1107, a single cortical cell from the root of Spiranthes cernua, showing fungal strands (/), cyto- plasm (c), and the nucleus («); 1106 considerably, and 1107 highly magnified. for example, hyphae from the fungal sheath invade and modify the epidermal layer (fig. 1105). Even ecto- trophic fungi may penetrate into the root, though in that event they commonly are intercellular rather than intra- cellular, as in most endotrophic forms. In some pines there are both ectotrophic and endotrophic mycorhizas, the relative develop- ment of the two kinds varying with the habitat. In some climb- ing plants (as Vanilla) the fungus is both ectotrophic and endo- trophic and is said to penetrate _ â A .â ii. u I . even the tissues of the supporting Fig. 1108. â A section through the gameto- r phyte of Botrychium, showing endotrophic plant as well as those of the liana, mycorhiza, the fungi inhabiting the ventral There is little doubt that the region; considerably magnified. â After coralloid aspect of roots associated Jeffrey. with ectotrophic fungi and the tu-. ^ In Corallorhiza, which has no roots, fungi occur in the rhizome and in its "root hairs," and in Aplectrum, which has ordinary endophytic root fungi, the removal of the corm is followed by the development of coralloid rhizomes that bear "root hairs " and contain fungi, precisely as in Corallorhiza,. 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 Coulter, John Merle, 1851-1928; Bar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
