SENSITIVITY OF ROOTING AND TOLERANCE TO COPPER IN <i>AGROSTIS TENUIS</i> SIBTH.

Nicholls, M. K.; McNeilly, T.

doi:10.1111/j.1469-8137.1979.tb02297.x

Cited by 33 publications

(13 citation statements)

References 22 publications

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“…1). It is important that, for single-concentration tolerance tests, a wide range of concentrations be tried initially, to find a concentration which effectively separates tolerant from nontolerant plants; however, for a complete understanding of the nature of variation in tolerance and its possible ecological implications, a multiple-concentration approach is preferable (Wilkins, 1978;Nicholls and McNeilly, 1979). The traditional method of quantifying tolerance as the ratio of root growth in metal solution to control growth in uncontaminated conditions (Wilkins, 1957;Jowett, 195 8) has the disadvantage of being statistically unwieldy in parallel-control experiments (Wilkins, 1978) where each plant is tested in only one concentration rather than sequentially in two or more concentrations.…”

Section: Discussionmentioning

confidence: 99%

DIVERSITY OF METAL TOLERANCES IN PLANT AGO LANCEOLATA L. FROM THE SOUTHEASTERN UNITED STATES

Pollard

1980

New Phytologist

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SUMMARYPopulations of Plantago lanceolata L, from a variety of habitats in the southeastern United States contaminated with zinc, copper or arsenic (from mining), or lead (from motor vehicle exhaust fumes) were found to be more tolerant to the metals present at the collection site than was a control population from uncontaminated soil. This is the first record of copper or arsenic tolerance in this species. Testing was based on root growth of young seedlings in aqueous solutions of metal salts. In the case of arsenic, there was extremely high tolerance in seedlings from plants in contaminated soils, but the seedlings from plants growing on uncontaminated soil, although severely inhibited on average, contained a few individuals of high tolerance, suggesting a potential for rapid evolution of tolerance to this contaminant.

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Section: Discussionmentioning

confidence: 99%

DIVERSITY OF METAL TOLERANCES IN PLANT AGO LANCEOLATA L. FROM THE SOUTHEASTERN UNITED STATES

Pollard

1980

New Phytologist

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“…Phenotypic plasticity represents a fundamental strategy for perennial plants to survive environmental change and respond to favourable conditions. For several species it has been found that variation in response to environmental change may reflect differences in the genetic control of phenotypic plasticity (Bradshaw 1965 ;Khan, Antonovicw & Bradshaw, 1976;Jain, 1978;Nicholls & McNeilly, 1979;Marshall, Levin & Fowler, 1986;Shaw, 1986;Shaw & Antonovics, 1986). Such variation in plasticity may be related to the habitat from which particular plants are collected, as reported for Plantago major (Lotz & Blom, 1986), Ammophila arenaria (Gray, 1985), and Collomia linearis (Wilken, 1977).…”

Section: Between Population Variation In Plasticitymentioning

confidence: 91%

Population variation in Spartina anglica C. E. Hubbard

Thompson

McNeilly

Gray³

1991

New Phytologist

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SUMMARYThe response of clonal replicates of nine populations of Spartina anglica C. E. Hubbard to environmental variation was examined in three pot environments, designed to test for differences between the populations in their response to environmental variation. ANOVA showed that the effect of environment was highly significant for all morphological and yield characters, and that the populations were also significantly different for several characters. For above and below ground vegetative biomass, there was a significant population x environment interaction, indicative of differences in plasticity between the populations. Linear regression of the population mean value in each environment on the mean value of all populations in each environment was performed for these two traits. This showed that the response to environmental change was not significantly due to a linear relationship in some populations, hence, the method could not be used to compare the response of each population. Nevertheless, norms of reaction plots for each population showed that the three populations collected from successionally mature sites showed less response to more favourable conditions. The three mature populations also had significantly lower tiller numbers per plant in all environments. These results substantiate previous results which suggest a decline in vigour and plasticity in successionally mature populations. Morphological characters, except third leaf width and culm diameter, all proved to be significantly correlated in pairwise comparisons. This is further evidence for the occurrence in S. anglica of ' graceful' and ' stocky' variants which contrast with the highly plastic 'anglica' growth form.

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“…An alternative assessment of tolerance has been proposed by Nicholls & McNeilly (1979) based upon the correlation between root length and a range of metal concentrations, following a similar approach to problems of genotype x environment interaction by Finlay & Wilkinson (1963). The data for the correlations between logj^ root length and concentrations of the five metals used in the present experiment (Table 2) would seem to provide more critical estimates of tolerance to those metals than tolerance indices, since the bias of control root lengths is minimised, and patterns of overall response to heavy metals are not adequately reflected in their response to a single test level of a metal.…”

Section: Discussionmentioning

confidence: 99%

DIFFERENTIAL TOLERANCE OF THREE CULTIVARS OF AGROSTIS CAPILLARIS L. TO CADMIUM, COPPER, LEAD, NICKEL AND ZINC

1985

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SUMMARYRoot growth of seedlings of the Agrostis capillaris L. cultvars Parys (copper tolerant), Goginan (lead/zinc tolerant), and Highland (non tolerant) was measured after 14 d growth in solution cultures with increasing concentrations of Cd, Cu, Pb, Ni and Zn.Increasing inhibition of root growth of all three cultivars occurred with increasing concentrations of all five metals. Highland being most affected. In Cu, Parys was least affected; in Pb and Zn Goginan was least affected. Parys and Goginan thus display specific resistence to these metals. They are also similar in having greater root lengths at higher metal concentrations of all five metals than Highland. They thus exhibit non-specific low level tolerance to metals other than those present at toxic levels in the soils from which they were derived.

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SENSITIVITY OF ROOTING AND TOLERANCE TO COPPER IN AGROSTIS TENUIS SIBTH.

Cited by 33 publications

References 22 publications

DIVERSITY OF METAL TOLERANCES IN PLANT AGO LANCEOLATA L. FROM THE SOUTHEASTERN UNITED STATES

DIVERSITY OF METAL TOLERANCES IN PLANT AGO LANCEOLATA L. FROM THE SOUTHEASTERN UNITED STATES

Population variation in Spartina anglica C. E. Hubbard

DIFFERENTIAL TOLERANCE OF THREE CULTIVARS OF AGROSTIS CAPILLARIS L. TO CADMIUM, COPPER, LEAD, NICKEL AND ZINC

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