. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fio. 14. Fig. 13.—Tracheid of Pinus sytvestris destroyed by Travutes pini. The primary cell-WHll is completely dissolved from below upwards to a^ a; 6, secondary and tertiary layers of the walls consisting in the under portion of cellulose only, in which gi'anules of chalk are recognizable ; c, fungus-hyphae boring through the walls, leaving holes d and e. (After R. Hartig.) Fic. 14.—Tracheid of Pinus destroyed by P
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fio. 14. Fig. 13.—Tracheid of Pinus sytvestris destroyed by Travutes pini. The primary cell-WHll is completely dissolved from below upwards to a^ a; 6, secondary and tertiary layers of the walls consisting in the under portion of cellulose only, in which gi'anules of chalk are recognizable ; c, fungus-hyphae boring through the walls, leaving holes d and e. (After R. Hartig.) Fic. 14.—Tracheid of Pinus destroyed by Poiyp&nis Schweinitzii. The cellulose has been extracted, and the wall consists only of wood-gum. The fissures are a result of drying-up, but they do not extend into the primary wall a, h. Crossing of the fissures takes place at the bordered pits c, and at the bore-holes d and e ; /, simple fissures. (After R. Hartig.) kind, the primary wall, containing but little cellulose, is hardly affected, and the secondary membranes shrink together, so that numerous fissures are produced running in a spiral direction, corresponding with that of the stratification (Figs. 13 and 14.) The tertiary membrane varies in its nature; it may consist of pure cellulose or be more or less lignified, or even cuticularized. In the wood-fibres of some plants {Gytisus, ffumulus,) this. 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 Tubeuf, Karl, freiherr von, 1862-1941; Smith, William G. London ; New York [etc. ] : Longmans, Green & co.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
