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NORTH AMERICAN SLIME-MOULDS THE MYXOMYCETES (Link) DeBary
Chlorophyl-Iess organisms whose vegetative phase consists of a
naked mass of multinuclear protoplasm, the plaimodium; reproduced
by spores which are either free or more commonly enclosed in
sporangia, and which on germinating produce ciliated or amoeboid
zoospores, whose coalescence gives rise to the plasmodium. The
Myxomycetes are,? A. Parasites, in the cells of living plants . . .
Phytomyxin.k B. Saprophytes, developed in connection with decaying
vegetable matter: a. With free spores Exosporeje b. With spores in
receptacles or sporangia . . Myxogastres Sub-Class PHYTOMYXIN/E
Schroeter 1889. Phytomyxinae Schroeter, Engl. a. Prantl., I., i.,
pp. 1 and 5. The parasitic Myxomycetes affecting plants include but
few (four or five) species, distributed among four genera. All are
parasites in the cells of particular hosts; their vegetative phase
is plasmodial and their spores are formed by the simultaneous
breaking up of the plasmodium into an indefinite number of
independent cells. But a single genus need here concern us,?
Plasmodiophora Woronin 1879. Plasmodiophora Woronin, Pringsh.
Jahrb., XI., p. 548. Parasitic in the parenchymatous cells of the
roots of living plants, causing noticeable enlargement of the
affected organ, producing at length galls, knots, and various
deformities and distortions. Spores spherical, smooth, colorless,
16 /t. I. Plasmodiophora Brassic Woronin. 1879. Plasmodiophora
bratsicae Woronin, op. rit. This species, typical of forms so far
reported in this country, infests the roots of cabbages,1 and
produces a very serious disease of that vegetable. In England the
malady has long been known under the names "clubbing," "fingers and
toes," etc. The roots affected swel...
|Country of origin:
Thomas Huston Macbride
||246 x 189 x 6mm (L x W x T)
||Paperback - Trade
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