. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER III.—SPORES OF FUNGI. 69 A- also the rest of the hymenial tissue, becomes entirely dissolved by processes of decom- position not accurately known, and the spores are thus set at liberty. They lie at first in the place where they were formed; their subsequent fortunes are described in Division II. The history of the basidia, which make their appearance as branches of the simple sporophores and form gonidia in Peziza Fuckeliana ('Botrytis cinerea'), is essential
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER III.—SPORES OF FUNGI. 69 A- also the rest of the hymenial tissue, becomes entirely dissolved by processes of decom- position not accurately known, and the spores are thus set at liberty. They lie at first in the place where they were formed; their subsequent fortunes are described in Division II. The history of the basidia, which make their appearance as branches of the simple sporophores and form gonidia in Peziza Fuckeliana ('Botrytis cinerea'), is essentially the same. They disappear entirely after the gonidia are ripe, and the latter cling in loose heaps to the place of their formation. The process of abscision is the most common of the three and appears with the greatest variety of forms. Generally a transverse zone between the adjacent cells disappears or grows soft, and their separation is thus effected or made easy. The transverse zone which disappears is either a middle lamella of the cross septum a between the two cells or it is a small stalk-cell, which is cut off from the young spore by a cross septum and then dis- appears, as in the uredo-chains of Coleo- sporium and Chrysomyxa and all the Aecidieae. The changes observed in the zone of separation are in one series of cases simply that it becomes gradually smaller and especially narrower and at length entirely disappears ; in other cases it swells up^ into a jelly and becomes disorganised. The product of the swelling may in the latter case be persistent, and is then usually increased to a considerable extent by the gelalinisation of the lateral walls of the spores, which are therefore ultimately glued together by a gelatinous mucilaginous gummy substance; in other cases the products of disorganisation at length entirely disappear, and complete isolation of the spore is effected. It is natural to suppose that this process de- scribed as disappearance consists in a trans
Size: 822px × 3041px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisheroxfor, bookyear1887
