. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 642 THE PATHOGENIC naked eye by bluish-green spots on sections of stems and rhizomes of the host-(Fig. 319). These originate as follows: the species of Gunnera possess charac- teristic mucilage-secreting organs, in the form of fissures of the leaf-tip, collaters on the leaves, and glands on the stems. Merker^ found that these glands originated endogenously in the growing point between each pair of leaves. Th
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 642 THE PATHOGENIC naked eye by bluish-green spots on sections of stems and rhizomes of the host-(Fig. 319). These originate as follows: the species of Gunnera possess charac- teristic mucilage-secreting organs, in the form of fissures of the leaf-tip, collaters on the leaves, and glands on the stems. Merker^ found that these glands originated endogenously in the growing point between each pair of leaves. The mature glands are covered only by the epidermis, and when activity commences the uppermost cells of the gland-tip, after swelling, become detached and converted into slime (Fig. 320). Ultimately the epidermis is ruptured by the pressure of the slime, and the remaining glandular cells are in turn rapidly transformed into the same substance. Fig. 319.—Nostoc gunnerae. Longi- tudinal section through the apex of a stem of Gunnera vuxnicata. The punc- tated spots indicate the position of Nostoc-colonies. (v. Tubeuf deL). 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
