Results 241 to 250 of about 46,886 (268)

Ecotypic differentiation inTrifolium repens

Plant and Soil, 1963
The indigenous white clover (Trifolium repens) ofFestuca-Agrostis pastures in S. Scotland is shown to be characteristically small leaved, prostrate and of small diameter in comparison with the cultivar S184. Within the indigenous type, leaflet size was found to be differentiated in relation to soil base status.
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Control of Johnsongrass Ecotypes

Weed Science, 1971
Field experiments were conducted to study the effectiveness of 2,2-dichloropropionic acid (dalapon) for the control of 55 morphologically distinct ecotypes of johnsongrass (Sorghum halepense(L.) Pers.) collected throughout the United States and from several foreign countries.
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Ecotypes and Community Function

The American Naturalist, 1960
The result of natural selection is commonly a pattern of ecotypic variation within a species. This has proven to be of rather general occurrence among trees, shrubs, grasses, and herbs, annual and perennial. Among animal species, the demonstration is less general, but includes examples among insects, fishes, amphibians, and rodents.
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Ecotypic Differentiation in Prosopis (Mesquite)

Ecology, 1965
Laboratory—germinated seedlings of 26 populations, representing three species of Prosopis and obtained from a wide geographic expanse bounded by the Oklahoma—Kansas border to the north and inclusive of continental Mexico to the South, were utilized in experimental ecology during 1961 and 1962.
J. Talmer Peacock, Calvin McMillan
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Ecotypes and Ecosystem Function

BioScience, 1969
ecotype in ecosystem function is primarily one of allowing a community of organisms to adjust to its habitat." The second: "The simultaneous selection of ecotypic variants within different kinds of organisms occupying a given area results in harmonious functions of a particular ecosystem." The third: "The selection of eco-genetic gradients results in ...
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Ecotype differentiation in Capsella

Vegetatio, 1990
Seed samples were collected from wild populations of Capsella bursa-pastoris growing along a cline from low elevations to the high mountain region in Switzerland and from different latitudes in Scandinavia. Progeny were grown in open-field random block experiments, in transplantation experiments and in growth chambers.
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Ecotypic Differentiation in Diamorpha cymosa

Botanical Gazette, 1964
In the winter of 1959 population samples of Diamorpha cymosa Nutt. were transplanted from numerous granite and sandstone outcrops to a simulated outcrop in an experimental garden on the Emory University campus. Population samples from a centrally located outcrop were reciprocally transplanted to each outcrop visited.
J. Frank McCormick, Robert B. Platt
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Brain metastasis: From etiology to ecotypes

Cancer Cell
Despite recent advances in anti-cancer therapies, metastasis, especially to the brain, represents a major clinical challenge with rising incidences. In this issue of Cancer Cell, Xing et al. present a comprehensive transcriptomic map of the metastatic brain tumor environment at single-cell resolution.
Michael, Schulz, Marco, Prinz
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PHOTOPERIODIC ECOTYPES OF TREES

Canadian Journal of Botany, 1954
Seedlings of Pinus sylvestris L. and Alnus incana (L.) Moench. from two widely different latitudes were grown under two different photoperiods, but otherwise under optimum conditions. Under continuous light the seedlings from a far northern latitude grew better than those from a more southern latitude.
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Adaptation and ecotypic components

Proceedings of the Royal Society of London. Series B - Biological Sciences, 1956
At the present time botanical ecotypic investigations are still concerned mainly with amplifying the records of ecotypically differentiated populations and defining their patterns, and only incidentally with the processes of ecotypic fractionation. That ‘strictly specialized ecotypes are frequently very uniform populations and practically homozygous in
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