. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. MISCELLAirmVS CROPS. 147 group of which the " smnts " are important members. Fig. 49 represents a transverse section of a root with nodule. In very thin sections under , the nodules are seen to be filled with hyphse and spores. The spores of this fungus are more or less v-shaped, and are formed by division of the protoplasmic contents of the hyphal filaments which ramify in the root-tissues of the host-plant. Unlike most of the members of the Ustila- ginece,
. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. MISCELLAirmVS CROPS. 147 group of which the " smnts " are important members. Fig. 49 represents a transverse section of a root with nodule. In very thin sections under , the nodules are seen to be filled with hyphse and spores. The spores of this fungus are more or less v-shaped, and are formed by division of the protoplasmic contents of the hyphal filaments which ramify in the root-tissues of the host-plant. Unlike most of the members of the Ustila- ginece, the hyphge of Ustilago cucumeris i are not divided 'Xyleni, Pfdoern Cortical PoJ' Epidermis Fig. 49.—Tbansveese Section op a Boot with Nodule. (Under low power.) by transverse septa. The hyphse (which are many times :hicker than the cell-walls of the adjacent tissues) pass, jeU by cell, through the cortex of the rootlet, and some- imes across the intercellular spaces (Pig. 50). Branching )f the hyphse is well marked in the tissues of the nodules, md sometimes they send out lateral branches which end ibraptly in the cells. The protoplasm of the nodular cells ifter a time becomes vacuolated (Fig.' 50) and filled with ipores. The spores of the cucumber-root fungus are bund in the soils (where Cucwmis sativa has been grow- ng) in the autumn and early winter, having been Hber- 1 Originally described as Ustilago 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 Griffiths, A. B. (Arthur Bower), 1859-. London : G. Bell
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Keywords: ., bookauthorgriffith, bookcentury1800, bookdecade1890, bookyear1890
