| ultrastructure of the alnus crispa var. mollis fern. root nodule endophyte. | nitrogen-fixing, field-obtained root nodules of the silky green alder were studied by transmission electron microscopy. the nodule endophyte exhibited a prokaryotic cytology and was present in two forms: the hypha(0.3-1.0mum), which was branched and septate, and the vesicle (3-5mum), which was also septate and developed at the parental hypha tip. bacteria-like cells, previously observed in light microscopy studies, were not seen in the present work. the actinomycete-like endophyte penetrated ... | 1975 | 167930 |
| ultrastructural and immunological demonstration of the nodulation of the european alnus glutinosa (l.) gaertn. host plant by the north-american alnus crispa var. mollis fern. root nodule endophyte. | the inoculation of the european alnus glutinosa (l.) gaertn. host plant by a crushed-nodule inoculum, prepared with the north-american alnus crispa var. mollis fern. root nodule, was successful. fluorescein- and ferritin-labelled antibodies, specific against the a. crispa var. mollis root nodule endophyte (lalonde et al. 1975), demonstrated the idenity of this endophyte in the resulting nodules. the nodulation process of this abnormal host-endophyte system was studied by light and electron micro ... | 1977 | 922604 |
| demonstration of the isolation of non-infective alnus crispa var. mollis fern, nodule endophyte by morphological immunolabelling and whole cell composition studies. | two filamentous, branched, and septate actinomycetes were isolated from field-collected and from axenic in vitro produced root nodules of alnus crispa var. mollis fern. host plant. after their transfer to a chemically defined medium, these nodule isolates could not be distinguished from each other on the basis of morphology, cultural reactions, and whole cell composition and were considered to be the same species. they were morphologically similar to the root nodule endophyte, but were incapable ... | 1975 | 1220859 |
| [light microscopy of axenic root nodules of alnus crispa var. mollis]. | | 1973 | 4585303 |
| characterization of an effective actinorhizal microsymbiont, frankia sp. avci1 (actinomycetales). | the actinomycete, frankia sp. avci1, isolated from root nodules of alnus viridis ssp. crispa was grown in axenic culture and used to inoculate host seedlings. this bacterium has been shown to be an infective and effective nitrogen-fixing microsymbiont which can be distinguished from other frankiae, in vitro, on the basis of size, distinctive morphology, and growth characteristics. cross-inoculation studies indicated that the host range of this symbiont encompasses all of the members of the gener ... | 1980 | 7459721 |
| identification of frankia strains by two-dimensional polyacrylamide gel electrophoresis. | fifteen frankia strains from five different plant species were analyzed by two-dimensional polyacryl-amide gel electrophoresis to determine their relatedness by comparing the polypeptide patterns obtained. three major subgroups (a, c, and d) were found in the alnus-comptonia-myrica cross-inoculation group. an isolate from purshia tridentata had a unique protein pattern and represents a distinct group of frankiae. members of group a were isolated from root nodules of alnus incana subsp. rugosa an ... | 1984 | 16346488 |
| aryl hydrocarbon bioaccessibility to small mammals from arctic plants using in vitro techniques. | through their diet, herbivores inhabiting contaminated sites may be chronically exposed to a variety of aryl hydrocarbons (e.g., dioxins and polycyclic aromatic hydrocarbons [pahs]). however, little is known about how differences in morphology and physiology among plant species alter the environmental accumulation of aryl hydrocarbons or their release and subsequent activity in the gastrointestinal tract of herbivores after ingestion. in the present study, the activity of aryl hydrocarbons durin ... | 2007 | 17373513 |
| root-associated ectomycorrhizal fungi shared by various boreal forest seedlings naturally regenerating after a fire in interior alaska and correlation of different fungi with host growth responses. | the role of common mycorrhizal networks (cmns) in postfire boreal forest successional trajectories is unknown. we investigated this issue by sampling a 50-m by 40-m area of naturally regenerating black spruce (picea mariana), trembling aspen (populus tremuloides), and paper birch (betula papyrifera) seedlings at various distances from alder (alnus viridis subsp. crispa), a nitrogen-fixing shrub, 5 years after wildfire in an alaskan interior boreal forest. shoot biomasses and stem diameters of 4- ... | 2011 | 21441343 |