. Comparative morphology of Fungi. Fungi. Fig. 121.—1. Uncinula Salicis on Salix discolor. Haustoria which have penetrated the hypodermal cell layers. 2. Phyllactinia corylea on Cornuss tolonifera. Hyphal branch penetrating the mesophyll. 3. Erysiphe graminis on Poa pratensis. Haustoria. (1, 2 X 600; 3 X 1,200; after G. Smith, 1900.) the cuticle and the cell wall into the interior of the epidermal cell (Fig. 120, 2 to 4) and expands there into a saccate haustorium (Fig. 120, 5 and 6). This simple tuberiform or saccate knot is the usual type of haustorium in this group. Only in Erysiphe gramini
. Comparative morphology of Fungi. Fungi. Fig. 121.—1. Uncinula Salicis on Salix discolor. Haustoria which have penetrated the hypodermal cell layers. 2. Phyllactinia corylea on Cornuss tolonifera. Hyphal branch penetrating the mesophyll. 3. Erysiphe graminis on Poa pratensis. Haustoria. (1, 2 X 600; 3 X 1,200; after G. Smith, 1900.) the cuticle and the cell wall into the interior of the epidermal cell (Fig. 120, 2 to 4) and expands there into a saccate haustorium (Fig. 120, 5 and 6). This simple tuberiform or saccate knot is the usual type of haustorium in this group. Only in Erysiphe graminis, the haustoria grow laterally to long filiform lobes (Fig. 121, 3). Generally the haus- toria remain limited to the epidermal cells; only in Uncinula Salicis they may penetrate to the subepidermal cells but never further (Fig. 121, 1). In spite of this extreme ectophytism which only differs from pure epiphytism in the formation of haustoria, and in spite of their hyaline walls, the Erysiphaceae are very resistent to external influences; , they can thrive on parts of plants which are in full sunlight the whole day. They are found from the polar regions to the tropics but. 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 Gäumann, Ernst Albert, 1893-1963; Dodge, Carroll William, 1895-. New York [etc. ] McGraw-Hill Book Company, Inc.
Size: 904px × 2764px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublishern, booksubjectfungi
