. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. Fig. 41. Protomyus macrosporus, Unger. a mature resting-spore in the dormant state (see section LIIl) with the remains of the hypha on which it was formed, b further development when cultivated in water; the protoplasm enclosed in an inner layer of the membrane (inner cell) swells up and escapes from the ruptured outer layers of the membrane, c—e development of the spores in the inner cell (sporangium) which has escaped frvm the outer cell. In ^ the protoplasm is pari
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. Fig. 41. Protomyus macrosporus, Unger. a mature resting-spore in the dormant state (see section LIIl) with the remains of the hypha on which it was formed, b further development when cultivated in water; the protoplasm enclosed in an inner layer of the membrane (inner cell) swells up and escapes from the ruptured outer layers of the membrane, c—e development of the spores in the inner cell (sporangium) which has escaped frvm the outer cell. In ^ the protoplasm is parietal In </the protoplasm is dividedinto spores. In e the spores form a cluster and are separated from the layer of protoplasm which still lines the walL Magn. 390 times. and presently assume the form of small cylindrical rods about 2. 2 /t in length. The differentiation in the protoplasm described in my work quoted in section LIII as preceding the partition requires fresh examination. A granular parietal layer of protoplasm which permanently clothes the membrane and a small portion of hyaline substance between the spores, possibly of the nature of protoplasm, is not employed in the formation of the spores. The latter substance becomes visible, when the spores have taken the form of rods and have collected into a ball (i) on one side of the wall of the sporangium, as a series of radiating threads running from the ball of spores to the wall-utricle; but by degrees it disappears entirely and a watery fluid takes its place. Section XX. The spores which are produced endogenously are usually set free from their mother-cells in some determinate manner as soon as they are ripe and fiilly grown. In a few cases, as in Elaphomyces, Eurotium and perhaps in Penicillium, they escape from the mother-cell before they have acquired the size and structure which usually precede germination, and they subsequently attain to these at the expense of dissimilar cells which had surrounded the spor
Size: 1407px × 1777px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisheroxfor, bookyear1887
