NSIS Volume 40 - Part 1
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Item Open Access Table of contents (v. 40, p. 1)(1993) Nova Scotian Institute of ScienceItem Open Access Treasurer’s report, 1992-1993(1993) Nova Scotian Institute of ScienceItem Open Access President's report 1992-93(1993) Nova Scotian Institute of ScienceItem Open Access Turning topics(1993) Nova Scotian Institute of ScienceItem Open Access Obituary: K.A. Harrison(1993) Nova Scotian Institute of ScienceItem Open Access Adiantum pedatun in Nova Scotia(1993) Porter, S.L.Item Open Access Item Open Access Studies of trichoderma isolates from mytilus edulis collected on the shores of Cape Breton and Prince Edward islands(1993) Brewer, D.; Greenwell, M.; Taylor, A.Samples of Mytilis edulis (mussel) were collected from coastal sites randomly selected on the south·eastern shores of Prince Edward Island and from similar locations on the southern shore of Cape Breton Island. Cultivation of aliquots of tissue from these animals revealed a diverse fungal flora from which 49 cultures of the genus Trichoderma were isolated. The number of propagules from which these cultures were derived was multiplied by a factor to reflect the dry weight of mussel tissue used in the isolation. A random sample of 29 isolates from this theoretical collection was then selected and it was found possible to cultivate 28 of these in the laboratory. All nine isolates of Trichoderma hamatum, produced isocyanide metabolites. Improvements in the assay of these compounds are reported.Item Open Access Undescribed mammoth (mammuthus) teeth from Georges Bank and Nova Scotia(1993) Cooke, H.B.STen molar teeth of mammoths are described, nine of them dredged by fishermen from the northeastern corner of Georges Bank while the tenth was in gravel from near James River, Nova Scotia, although found at St. Francis Xavier University. Measurements and morphological features are discussed and the molars are referred to woolly mammoth (Mammulhus primigenius) although a few specimens are lower crowned than is usual and may represent a local variant.Item Open Access First record of the potential nuisance alga codium fragile ssp. tomentosoides (chlorophyta, caulerpales) in Atlantic Canada(1993) Bird, C. JThe green macroalga Codium fragile ssp tomentosoides was collected for the first time in Atlantic Canada at Graves Shoal, Mahone Bay, Lunenburg County, Nova Scotia, in December 1991. Casual observations in this area during the late 1980s suggest that it was present in 1989, possibly earlier. By late 1992, it had been found widely throughout Mahone Bay and eastward as far as Prospect Bay in Halifax County. The evidently rapid dispersal, large size of plants and abundant production of gametangia indicate that the semiconfined environment of bays on the Atlantic coast of Nova Scotia is favorable to the alga, which in consequence may be a serious foulant and competitor with the indigenous flora. It is probable that C. fragile ssp. tomentosoides was transported from New England to Nova Scotia either by recreational yacht traffic or in a mass of warmer water driven westward from the Gulf Stream.Item Open Access Effects of pisolithus arhizus and other ectomycorrhizal fungi on in vitro rooting of pinus monticoia adventitious shoot.(1993) McAfee B.J; Pedras, M. S. C; Lapp, M. SMicropropagation of conifers permits the production of large numbers of selected genotypes but in Pinus monticola as well as several other systems, this process is limited by the difficulty of obtaining roots. The potential of ectomycorrhizal fungi to induce and improve adventitious root formation on in vitro micropropagated shoots was investigated. Preliminary trials on de·rooted seedlings showed 100% rooting with Laccaria bicolorr, Rhizopogon rubescensand Pisolilhus arhizus while rooting on controls was at 79 %; however only P. arhizus had a significant effect on the rooting of micropropagated shoots. Co-cultivation with P. arhizus in a medium amended with 0.3 µM 1-naphthaleneacetic acid (NAA) gave the best rooting percentages (57%). Thin layer chromatography, high-performance liquid chromatography, and gas chromatography/mass spectrometric analysis of the broth from a P. arhizus culture in NAA amended media indicated the presence of hydroxylated NAA metabolites.