. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. FIG. 18. a andr Claviceps purpurea, b C. a and* scle- rotia with mature sporophorcs. c transverse section through a sclerotium with the young sporophores emerging from the interior. After Tulasne. ,i and * nat. size, c slightly magnified. Fig. 19. Sclerotitiia Fuckeliana, a very small specimen, s transverse section through a sclerotium, from which a sporophore cut through lengthwise has proceeded. The dark spots in the sclerotium are the dead cells of the vine
. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. FIG. 18. a andr Claviceps purpurea, b C. a and* scle- rotia with mature sporophorcs. c transverse section through a sclerotium with the young sporophores emerging from the interior. After Tulasne. ,i and * nat. size, c slightly magnified. Fig. 19. Sclerotitiia Fuckeliana, a very small specimen, s transverse section through a sclerotium, from which a sporophore cut through lengthwise has proceeded. The dark spots in the sclerotium are the dead cells of the vine-leaf which it has occupied ; the spots and dots at / are calcium oxalate aggregations. Magn. 20 times. of these primordia (Anlagen) of sporophores on their sclerotia, others cannot do this. Vigorous specimens of Coprinus stercorarius, according to Brefeld, may produce hundreds of primordia, of which however few are ever perfected, and if those already formed are intentionally and repeatedly destroyed hundreds of fresh primordia as repeatedly make their appearance. Oth<r species are less productive; Sclerotinia Sclerotiorum seldom has two dozen sporophorcs even on strong plants; species with small sclerotia have usually one only or very few. The size of the individual sclerotia on one and the same species, other conditions being the same, generally causes a difference in the number of the sporophores which commence and complete their development, and in the vigour of growth of the latter. Larger sclerotia are on the whole more productive than the smaller. Claviceps purpurea produ< i s 20-30 sporophorcs from such large sclerotia as are formed upon the ears of Secale cereale, but only one or a i'cw weakly ones from the small sclerotia upon the spikelets of Bromus, Lolium, and Anthoxanthum. Similar differences arising from the size of the sclerotia are observed also in Sclerotinia Sclerotiorum and in Coprinus. The relation between size and productiveness is the. Please note
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