. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 550 THE PATHOGENIC ALGAE. The zoospores (gametes) copulate in the gelatinous mass which escapes, and break out from it as free swarming zygozoospores. When the Zemna falls to the bottom in autumn, or when it dries up, the cells of the alga become resting-cells capable of sustaining drought. Plants of Lemna seem to be little disturbed by attacks of the endophyte, and develop their flowers normally. Chi. Knyanuin Kirc
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 550 THE PATHOGENIC ALGAE. The zoospores (gametes) copulate in the gelatinous mass which escapes, and break out from it as free swarming zygozoospores. When the Zemna falls to the bottom in autumn, or when it dries up, the cells of the alga become resting-cells capable of sustaining drought. Plants of Lemna seem to be little disturbed by attacks of the endophyte, and develop their flowers normally. Chi. Knyanuin Kirch n. Frequents Lemna minor and L. gibba, Ceratophyllum demersum, Elodea canadensis, but not Lemna trisulca. It forms zoospores only, and these on penetrating into a host do not produce a cellulose button like the species just described. They appear to be able to enter the host only by the stomata. ChL pallidum Klebs. Grows in the intercellular spaces of Lemna trisulca. Chi. viride Schroet. Found in the respiratory cavity of Rumex obticsifoUus. Other species occur in dead Phanerogams or in Algae. Stomatochytrium lininan- themam Cunningh. Inhabits the respiratory cavity of leaves of Limnanthemum indicum in India. Chlorocystis Cohnii Eeinh. Occurs as a " shelter-parasite " Fig. 326.—£7ido^j>ftacra biennis in Potamogeton jjj marine al^^aC. luce-Hi. Cell of the Alga, which has penetrated ^ through the epidermis a few weeks previously. SCOtillOSphaera paradOXa Klebs. Found between the cells of dying leaves of Hypnum and Lemna triscida. Endosphaera biennis Klebs. The zygozoospores have four cilia, and swarm in water till they reach a living leaf of Potamogeton lucens. They generally come to rest on the under- side of a leaf at the boundary wall between two cells, and become invested in a membrane. A process is next sent in between the epidermal cells, and all the cell-contents pass over into it, the outer portion dying away. The young alga now makes its way into the in
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
