Genetic studies in heavy metal tolerant plants

Gartside, Denis W.; McNeilly, T.

doi:10.1038/hdy.1974.38

Cited by 40 publications

(5 citation statements)

References 25 publications

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“…Dactylis glomerata and Holcus lanatus are both known to produce edaphic ecotypes (Gartside & McNeilly 1974, Coughtrey & Martin 1978. However, in this study neither species exhibited ultramafic-tolerant ecotypes.…”

Section: Discussioncontrasting

confidence: 48%

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Ecotypic differentiation in the ultramafic flora of the South Island, New Zealand

Lee

Mark

Wilson

1983

New Zealand Journal of Botany

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Fifteen species were investigated for ultramafic tolerance. Seven showed evidence of ecotypes including 4 indigenous species (Luzula crinita var. petriana, Poa colensoi, Neopaxia australasica, and Cotula pyrethrifolia) and 3 widely naturalised grasses (Agrostis tenuis, Anthoxanthum odoratum, and Lolium perenne). Plants from ultramafic populations achieved higher shoot calcium concentrations on ultramafic soil and John Innes Potting Compost, and maintained lower shoot/root ratios on ultramafic soil than plants from non-ultramafic populations. High residual nickel concentrations in shoots of ultramafic clones grown for up to 15 months on non-ultramafic soil suggest that for some species, a preconditioning period longer than the normal 6--8 weeks is required. No evidence of edaphic ecotypes was found in the woody species Nothofagus solandri var. cliffor-(ioides, Griselinia littoralis, or Leprospermum scoparium.

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Section: Discussioncontrasting

confidence: 48%

“…However, ultramafic tolerance in these experiments was measured only during the postgermination phase of the species life-cycle. Intraspecific differences may be exhibited at the germination stage as occurs in species on Cu contaminated soils (Gartside & McNeilly 1974).…”

Section: Discussionmentioning

confidence: 99%

Ecotypic differentiation in the ultramafic flora of the South Island, New Zealand

Lee

Mark

Wilson

1983

New Zealand Journal of Botany

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“…In particular, it is not clear whether this adaptation is generally produced by the combined action of several or many genes, individually of small effect (polygenic control) or whether there is normally one or a small number of major genes responsible for the bulk of the tolerance manifested in any individual. Genetic studies on Festuca ovina (Wilkins, 1960;Urquhart, 1971), Agrostis tenuis (Gartside and McNeilly, 1974c), Anthoxanthum odoratum (Gartside and McNeilly, 1974a) and Silene inflata (Broker, 1963) have all been interpreted as indicating polygenic control, or at least that a simple major gene system is not involved. Macnair (1977), on the other hand, suggested that in the yellow monkey flower, Mimulus guttatus, copper tolerance appeared to be governed by two major genes.…”

Section: Introductionmentioning

confidence: 99%

The genetic control of copper tolerance in the yellow monkey flower, Mimulus guttatus

1983

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SUMMARYEvidence is presented that copper tolerance in the yellow monkey flower, Mimulus guttatus is determined primarily by a single major gene. Selfed progenies of segregating Tx T families produce families which are all T, segregating or all NT in a 1: 2: 1 ratio. Segregating TX NT crosses produce approximately 1: 1 ratios. Significant heterogeneity between families within classes suggests that there are genetic modifiers also segregating, though some of the heterogeneity may be due to environmental factors. These results indicate that copper tolerance in this organism has evolved in a manner analogous to other adaptations such as mimicry, industrial melanism and pesticide resistance. The results also suggest that physiological models of metal tolerance involving many biochemical and physiological changes may need revision.

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“…Heavy-metal tolerance in A. capillaris is not genetically simple. It is under polygenic control (Gartside and McNeilly, 1974) and may be of polyphyletic origin (Nicholls and McNeilly, 1982). Early work on heavymetal tolerance suggested that the tolerance of minewaste populations was metal-specific (Gregory and Bradshaw, 1965;Turner, 1969;Walley et al, 1974).…”

Section: Discussionmentioning

confidence: 99%