Beitrag
Observations on Blastocladiella britannica
Karling, John S.
Nova Hedwigia Band 29 Heft 3-4 (1978), p. 569 - 575
9 Literaturangaben
veröffentlicht: Nov 24, 1978
DOI: 10.1127/nova.hedwigia/29/1978/569
ArtNo. ESP050002903010, Preis: 29.00 €
Abstract
An isolate of what is identified as B. britannica was isolated from scree and soil at the base of Mt. Hood, Oregon, U. S. A. at more than 2000 meters and grown on various substrata. It exhibited several developmental and morphological variations from the previous isolations in England, New Zealand, and Canada. It produced comparatively few zoosporangia (Z.) and a preponderance of resting sporangia (R. S.). A few stages of germination of R. S. occurred, and this process was basically similar to that of other species of Blastocladiella. No evidence of sexuality was observed, and B. britannica appears to be short-cycled. Blastocladiella britannica Hornstein and Cantino was discovered in England by Willoughby (1959) and named by Hornstein and Cantino (1961) who subsequently (1962) made intensive morphogenetic and physiological studies on cultures of Willoughby’s isolate. Later Cantino (1970) found one germinating resting sporangium and studied the progeny derived from it. Also, he and Truesdell (1971) made ultrastructural studies of its zoospores. Previously, Karling (1967) reported this species from New Zealand, and subsequently Booth (1971a, b, c) found it in several places in Canada. But like Willoughby neither of these workers succeeded in germinating the resting sporangia. Nevertheless, these are the only reports of B. brittanica in nature outside of England.
Schlagworte
isolate • scree • substrata • zoosporangia • germination • progeny • Mt. Hood • Oregon • U. S. A.