Chromosome Numbers of Goldenrods, Euthamia and Solidago (Compositae: Astereae). II. Additional Counts with Comments on Cytogeography

Semple, John C.; Ringius, Gordon S.; Leeder, Colleen; Morton, Gary H.

doi:10.2307/2806528

Cited by 49 publications

(25 citation statements)

References 14 publications

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“…Therefore, the tetraploid cytotype appears to be better adapted in this respect because it can maintain increases in pericarp weight without decreasing embryo weight. This may partially explain (other consequences of polyploidization cannot be dismissed) why the tetraploid cytotype is more widely distributed than the diploid cytotype (see Semple et al 1984 for discussion of cytogeography throughout the range of the species).…”

Section: Discussionmentioning

confidence: 97%

Comparison of achene characteristics within and among diploid and tetraploid clones of Solidago flexicaulis and their significance in germination and resource allocation studies

Chmielewski¹,

Semple²,

Burr³

et al. 1989

Can. J. Bot.

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Achene characteristics were examined within clones, among clones of a cytotype, and between the diploid and tetraploid cytotypes of Solidago flexicaulis. The pattern of intraclonal variation was similar in each of the three diploid and five tetraploid clones. In each of the clones, embryo weight increased with increasing achene weight and the number of days taken to germinate increased with increasing pericarp weight. Other significant correlations were not consistent among all clones. Generally, clones of the same cytotype were more similar to each other than to clones of the other cytotype. Additionally, the characteristics were generally larger among the tetraploid than diploid clones. However, a trend in decreasing size from southwestern to southeastern Ontario was observed. With respect to most measured characteristics, tetraploid clones occurring just west of the Frontenac Axis were intermediate between tetraploid clones occurring farther southwest in Ontario and diploid clones occurring just east of the Frontenac Axis. In this study, knowledge of ploidy level was important not only with respect to the analyses performed but also with respect to the interpretation of results and the correct assessment of causal factors of observed patterns of variation. Thus, knowledge of ploidy level is especially important in comparative ecological studies involving patterns of resource allocation and germination rates.

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Section: Discussionmentioning

confidence: 97%

Comparison of achene characteristics within and among diploid and tetraploid clones of Solidago flexicaulis and their significance in germination and resource allocation studies

Chmielewski¹,

Semple²,

Burr³

et al. 1989

Can. J. Bot.

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“…The above classification is adopted by Werner et al (1980) and Gleason & Cronquist (1991). Variety scabra has also been treated as a distinct species, S. altissima L. (Fernald, 1950;Beaudry & Chabot, 1957;Melville, 1979;Melville & Morton, 1982;Semple et al, 1984), because it is hexaploid (2n = 54) and can morphologically be distinguished from S. canadensis, e.g. by its nodding shoot tip during growth (Croat, 1972).…”

Section: Taxonomymentioning

confidence: 98%

“…Within this section, plants with pubescent stems and inflorescences with ascending to recurved lower branches belong to the canadensis complex. The complex has not been monographed yet and its taxonomy is incomplete (Werner, Bradbury & Gross, 1980;Semple et al,, 1984 These varieties differ mainly in the length of the involucre and disk corollas, and the degree of pubescence on stems and leaves. The above classification is adopted by Werner et al (1980) and Gleason & Cronquist (1991).…”

Section: Taxonomymentioning

confidence: 99%

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Morphological variation of the introduced perennial Solidago canadensis L. sensu lato (Asteraceae) in Europe

Weber

1997

Botanical Journal of the Linnean Society

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Morphological and life-history variation within and between 23 European populations of the introduced and widespread perennial Soldago canadensis L. sensu lato (Asteraceae) was investigated. The populations differed significantly in all 19 characters measured. Coefficients of variation and intraclass-correlations were high for characters related to growth. Floral characters (involucral height, number of disk florets, number of ray florets), and pubescence of stems and leaves varied considerably among sampled shoots, but their frequency distributions were unimodal and the coefficients of variation low. The first three principal components explained 48% of the variation and formed no clusters among the shoots. Several character means correlated with latitude, indicating clinal variation among the populations. Comparison of variation in floral and leaf characters with data from the native range suggests that S. canadmw s.

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“…In America, this species is referred to as Euthamia graminifolia (L.) Nutt. on the basis of anatomy and DNA studies (Semple et al 1981;Semple et al 1984;Abrahamson et al 2005). The remaining taxa are morphologically similar to each other.…”

Section: Study Speciesmentioning

confidence: 94%

Do Landscape Structure and Socio-Economic Variables Explain the Solidago Invasion?

Szymura

Świerszcz

2016

Folia Geobot

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Biological invasions are considered a major threat to biodiversity on a global scale. In this study, we examined the effect of landscape structure and socioeconomic variables on the invasion pattern of alien Solidago species. Field data were collected in a set of 309 sampling plots, regularly placed on the intersecting lines of a 10 × 10-km grid, in south-western Poland (Silesia, Central Europe). Landscape characteristics and average values of socio-economic variables, such as human population density and total income per capita, were calculated. To examine the effect of landscape structure across different spatial extents, the landscape characteristics were analysed for three different buffers (radius: 500 m, 2 km and 5 km). A model explaining the pattern of the invasion was developed using a univariate, binary classification (decision) tree. The results show that both landscape structure and density of human population explain the spatial pattern of the invasion by alien Solidago species. The pattern was mostly shaped by the presence of unsuitable (forests) and suitable (roadsides) habitats for Solidago. The influence of percentage forest cover and road length was the strongest at the small spatial extent (radius = 500 m). The sum of linear elements length, percentage of urban areas and human population density calculated at the large extent (radius = 5 km) significantly improved the model. However, the predictive ability of these variables was less accurate. The model can be used by local authorities and land managers for modelling/predicting the hazards of invasion and elaborating a landscapelevel system of Solidago control.

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Chromosome Numbers of Goldenrods, Euthamia and Solidago (Compositae: Astereae). II. Additional Counts with Comments on Cytogeography

Cited by 49 publications

References 14 publications

Comparison of achene characteristics within and among diploid and tetraploid clones of Solidago flexicaulis and their significance in germination and resource allocation studies

Comparison of achene characteristics within and among diploid and tetraploid clones of Solidago flexicaulis and their significance in germination and resource allocation studies

Morphological variation of the introduced perennial Solidago canadensis L. sensu lato (Asteraceae) in Europe

Do Landscape Structure and Socio-Economic Variables Explain the Solidago Invasion?

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