. Botany of the living plant. Botany; Plants. Fig. 336. Sporidia, or basidiospores, of Puccinia, germinating on the epidermis of a Barberry leaf, and putting out germ-tubes, which penetrate the cell-walls. Very highly magnified. (After Marshall Ward.) peculiarity is that they do not cause infection of the Wheat, but can penetrate the epidermis of the Barberry. Acting on suspicions already aroused, De Bary succeeded in carrying out an experimental infection in 1864. He found that the basidiospores, easily shed from. Fig. 337. Vertical section through a patch of aecidia (<?) and spermogonia (
. Botany of the living plant. Botany; Plants. Fig. 336. Sporidia, or basidiospores, of Puccinia, germinating on the epidermis of a Barberry leaf, and putting out germ-tubes, which penetrate the cell-walls. Very highly magnified. (After Marshall Ward.) peculiarity is that they do not cause infection of the Wheat, but can penetrate the epidermis of the Barberry. Acting on suspicions already aroused, De Bary succeeded in carrying out an experimental infection in 1864. He found that the basidiospores, easily shed from. Fig. 337. Vertical section through a patch of aecidia (<?) and spermogonia (s) on the Barberry leaf, showing the swelling of the diseased part. The small aecidium to the right has not yet burst. Highly magnified. (After Marshall Ward.) the sterigmata, germinate to form a germ-tube, which can directly penetrate the epidermal wall of the Barberry (Fig. 336). This initiates the second phase : and as the basidiospore itself is haploid, so is the stage produced from it on the Barberry. Each cell has only a single nucleus, which may be held to indicate a haploid condition, as in the 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 Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Macmillan and Co. , ltd.
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