. A monograph of the British Uredineae and Ustilagineae, with an account of their biology including the methods of observing the germination of their spores and of their experimental culture. Smut fungi; Rust fungi; Smut diseases; Fungi. 90 British UredinecB and UstilaginecB. branches of the mycelium which are given off into t] air. Upon these numerous short, lateral branches are giv( off, which swell up at the ends and become crescent spores (Fig. 15). No conjugation takes place betwe( these bodies. The branches of the mycelium which a given off in the fluid do not produce spores, but gro out
. A monograph of the British Uredineae and Ustilagineae, with an account of their biology including the methods of observing the germination of their spores and of their experimental culture. Smut fungi; Rust fungi; Smut diseases; Fungi. 90 British UredinecB and UstilaginecB. branches of the mycelium which are given off into t] air. Upon these numerous short, lateral branches are giv( off, which swell up at the ends and become crescent spores (Fig. 15). No conjugation takes place betwe( these bodies. The branches of the mycelium which a given off in the fluid do not produce spores, but gro outwards until at length they reach the air, when tht produce terminal spores or they remain sterile. In tl latter case the hyphse are empty and septate. Brefe has further observed that by long-continued culture tl: hyphae, under certain circun stances, become nodose, and aj parently develop certain globo! bodies which closely resemble tl: original teleutospore.* Entyloma.—The germinatio of Entyloma, though sitnilar t that of Tilletia, is far less con: plex. E. microsporum.—De Bary found that if the spores wei wholly immersed in water, the} in the course of twenty-four hour would give out a germ-tube fror four to ten times the length c the spore. At its rounded sum mit this promycelium gave o six or seven branches, each c which was dilated upwards ; ani when they attained a lengt measuring 30 or 40/x, each became cut off by a basc septum. They conjugate in pairs, by a transverse bridge * Brefeld, loc. cit., t. xiii. figs. 46-52. t De Bary, Bot. Zeitung (1874), PP- 81-92, 97-108, t. Fig. 8.—Entylojna microsporum. a, Teleutospore germinating (the pramycelial spores have conjugated at their upper ends) ; b, two secondary spores produced from the conjugated pairs of primary promycelial spores; c, teleutospore of £. calendula^ which has produced five promycelial spores, four of which have conjugated below. (De Bary.). Please note that these images are extracted from scanned
Size: 1185px × 2108px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectfungi, booksubjectsmu
