. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 546 THE PATHOGENIC ALGAE. but several inhabit Hepaticae, chiefly species of Anthoceros, Blasia, Pellia, Aneura, Diplolaena, Sauteria, and Biccia. Nostoc lichenoides Vauch.^ is a common endophyte in the mucilage-cavities of Anthoceros laevis. The motile algal filaments sain admission through the stomata or mucilage-fissures on the lower side of the thallus. Only one filament is admitted into each cavity, then the ope
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 546 THE PATHOGENIC ALGAE. but several inhabit Hepaticae, chiefly species of Anthoceros, Blasia, Pellia, Aneura, Diplolaena, Sauteria, and Biccia. Nostoc lichenoides Vauch.^ is a common endophyte in the mucilage-cavities of Anthoceros laevis. The motile algal filaments sain admission through the stomata or mucilage-fissures on the lower side of the thallus. Only one filament is admitted into each cavity, then the opening is closed by an increased turgescence and growth of the guard-ceUs; the imprisoned Nostoc multiplies to form a colony. Leitgeb states that after infection has successfully taken place, and frequently before the stoma has quite closed, the guard-. Fio. 323.—Aiuibaena azoiloi. Longitudinal section through the posterior lobe of a floating leaf of Azoila carolini&VAu The cavity is filled with ifo^Coc-filaments and septate hairs. 1, A septate hair, and a filament of Aiiahacna. (t. Tubeuf del.) cells divide and ultimately form a three-layered covering of cells over the intercellular space. Simultaneously all the thallus- cells round the infected cavity undergo radial division and grow into the cavity, first as papillae, then as much-branched and septate tubes of various lengths; the space left between them becomes meanwhile filled with the Nostoc. In the ease of Anthoceros laevis the tubes form a kind of pseudoparenchyma ^ Bibliography: Janczewski, Botan. Zeitung, 1872, and Annales d. sci. nalur., Ser. 5, xvi. Milde, Botan. Zeitung, 1851. Leitgeb, Akademied. Wissen- schaften in Wien, 1878; also Unternuchungen iiber Lebermoose, i. Goebel, "Die Musoineen," in Schenk's Handbuch d. Botanik, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustration
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