Showing papers by "Lindsay S. Olive published in 1964"
TL;DR: Spore discharge in basidiomycetes is effected primarily by the explosion of a small gas bubble in the area of the apiculus of the spore and by pressure of residual gas that has accumulated between the inner wall and outer membrane of theSpore apparatus.
Abstract: Spore discharge in basidiomycetes is effected primarily by the explosion of a small gas bubble in the area of the apiculus of the spore and by pressure of residual gas (probably carbon dioxide) that has accumulated between the inner wall and outer membrane of the spore apparatus. A somewhat similar mechanism of discharge has been discovered in an undescribed mycetozoan.
26 citations
TL;DR: This unusual organism was first encountered in the West Indies in December of 1960, during a search for cellular slime molds, and a new genus and family are hereby described to accommodate it.
Abstract: This unusual organism was first encountered in the West Indies in December of 1960, during a search for cellular slime molds. Since then, it has appeared in many isolation plates of collections from around the world in tropical and subtropical areas. While it was first thought to be a new species of Protostelium (Olive, 1962), a primitive relative of the cellular slime molds, such an alliance proved incompatible with the discovery that the amoeboid cells develop flagella when placed in water. The fructifications, like those of Protostelium, are quite simple and typically consist of one or two spores on a short stalk. The organism does not fit well into any known group of mycetozoans, and a new genus and family are hereby described to accommodate it.
18 citations
TL;DR: It is concluded that no regular sexuality occurs in the usual life cycle of the Acrasiales.
Abstract: Evidence for engulfment and anastomosis of the myxamoebae of several members of the Acrasiales is presented. Photomicrographic evidence for engulfment and anastomosis indicates that these processes are unrelated to any regular sexual mechanism. A'acuolar activity was found to be associated with plasma membrane properties in both anastomosis and engulfment. Frequent multiple engulfment, progressive destruction and digestion of the ingested cells, and ultimate egestion of both intact and partially digested engulfed cells are interpreted as evidence favoring the view that engulfment is a cannibalistic activity. Binucleate and multinucleate amoebae were produced by cell fusion; however, no supporting evidence for nuclear fusion was obtained from observations of either anastomosis or engulfment. It is concluded that no regular sexuality occurs in the usual life cycle of the Acrasiales. THE PROBLEM of sexuality in the cellular sliimie molds has intrigued nearly every investigator who has worked with the group. Skupienski (1918, 1920) was the first to suggest that preaggregation amoebae are involved in sexual "fusions." Wilson (1952, 1953), Wilson and Ross (1957), and Ross (1960) have presented cytological evidence which
18 citations