Über Bau, Entwicklung, Keimung und Bedeutung der Parasporen der Ceramiaceen

Studies on Marine Algae of the British Isles: the genusCeramium

“…117 D, 1956Oltmanns, 1904Oltmanns, , fig. 425.4, 1922Schiller, 1913, fig. I), the galls being described variously as 'polysporangia' or 'parasporangia'.…”

“…The first report of the occurrence of these structures was made by Kiitzing (1863, p. I, pI. I) in his account of Hormoceras acrocarpum, whilst Schiller (1913) has given a detailed account of their structure and development in Ceramium strictum. According to Schiller, the specimens occurred in an area of the Adriatic Sea where there was heavy pollution by sewage.…”

“…Nothing is known of the early stages of development, but the origin of the spore-masses by the modification of a tetrasporangium would appear to be very improbable. Schiller (1913, fig. 18) has given a figure of a young stage of germination of a spore from one of these spore-masses but the subsequent development of the germlings is unknown.…”

“…The chromatophores are more conspicuous in those species where the axial cell is exposed because of the incomplete cortical investment, but even so degeneration occurs with age. The presence of a central strand of cytoplasmic material in the axial cells of Ceramium has been discussed or figured by various authors (Moore, 1885;Petersen, 1908;Schiller, 1913;Phillips, 1926;Dammann, 1930Dammann, , 1932Celan, 1939a, b;Feldmann-Mazoyer, 1940;Feldmann & Feldmann, 1946;Funk, 1955). Phillips (1926, P.277) has rightly commented that Moore (1886) mis-interpreted the observations of Hick (1884) on C. acanthonotum ( = C.…”

“…The differences between carpospore and tetraspore germination are insignificant. Little or nothing is known of the germination of the so-called 'polys pores' or 'paraspores '; the only information available is the figure given by Schiller (1913) which is indistinguishable from a similar stage of germination of a carpospore or tetraspore.…”