. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. T2r. Fig. 6i. Formation of oospores and processes of fertilisation in the Peronosporeae. I~VI. Pythium facile. Suc- cessive states of an oogonium. / nuiturc oogonium; to tlie right of it is an antheridial branch formed but not yet delimited? // antheridium delimited by a transverse wall. /// the oospherc has rounded itself off in the oogonium, and a thin zone of periplasm lies between the oosphere and the wall of the oogonium. IV the antheridium has put out the fertil
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. T2r. Fig. 6i. Formation of oospores and processes of fertilisation in the Peronosporeae. I~VI. Pythium facile. Suc- cessive states of an oogonium. / nuiturc oogonium; to tlie right of it is an antheridial branch formed but not yet delimited? // antheridium delimited by a transverse wall. /// the oospherc has rounded itself off in the oogonium, and a thin zone of periplasm lies between the oosphere and the wall of the oogonium. IV the antheridium has put out the fertilisation-tube, and a dear receptive spot is visible on the oosphere. ^passage of the gonoplasm from the antheridium into the oosphere. VJ ripe oospore surrounded by a thick membrane and almost entirely filling the cavity of the oogonium. VII. Peronospora arhorescens; an oogonium with antheridium attached which has put out a fertilisa- tion-tube. The oosphere is already invested with a thick membrane; outside it is a comparatively broad zone of peri- plasm, which is contracting to form the exosporium round the oospore. I~VI raagn. about 800. VII600 times. organs, oogonia, in each of which one oosphere is formed, and male organs, antheridia, by which fertilisation is effected in the oosphere which developes into the oospore. The behaviour of these organs in the process of fertilisation varies con- siderably in the diflferent genera. It shall be described first in the genus Pythium. The oogonia of this genus (Fig. 6i) are terminal or intercalary spherical b c. 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 Bary, A. de (Anton), 1831-1888; Garnsey, Henry E. F. (Henry Edward Fowler), 1826-1903; Balfour, Isaac Bayley, 1853-1922. Oxford : Clarendon Press
Size: 1912px × 1306px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisheroxfor, bookyear1887
