Quantitative cytophotometric studies on isolated liver cell nuclei of the bullfrog, Rana catesbeiana

cBachmann, Konrad; Cowden, Ronald R.

doi:10.1007/bf00285154

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Results (I) Chromosome Volume1

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1966

1975

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Cited by 12 publications

(2 citation statements)

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“…cit. ; Leuchtenberger and Schrader, 1952;Bachman and Cowden, 1965). Extracted nuclei were stained in dinitrofluorobenzene and the total protein, in seven B chromosome classes (0-6B), was estimated by microspectrophotometry.…”

Section: Results (I) Chromosome Volumementioning

confidence: 99%

The effects of B chromosomes on the nuclear phenotype in root meristems of maize

Ayonoadu

Rees

1971

Heredity

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Section: Results (I) Chromosome Volumementioning

confidence: 99%

The effects of B chromosomes on the nuclear phenotype in root meristems of maize

Ayonoadu

Rees

1971

Heredity

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“…This concept, first proposed by Boivin et al (1948), is supported by studies using both plant (Swift, 1950) and animal (Bachmann and Cowden, 1965) species and is widely accepted as a valid generalisation (Vendrely, 1955;Kraemer et al 1972), although a few exceptions to the rule have been found, for instance, in the genotrophs of Linum (for a review see Durrant, 1971) and between tissues within certain insect species (Fox, 1969(Fox, , 1970.…”

Section: Introductionmentioning

confidence: 93%

DNA content of colchicine-induced endopolyploid nuclei in vicia faba L.

Bennett

Jellings

1975

Heredity

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SUMMARYThe relationship between ploidy level and nuclear DNA content was investigated by Feulgen microdensitometry in coichicine induced polyploid root-tip meristem cells of three Vicia species. Nuclear DNA content is expected to increase proportionately with the increase in ploidy, assuming DNA constancy. Our results showed that:(i) Absorption readings were significantly lower than expected for cells of higher ploidy levels. (ii) The deviation of the absorption readings obtained below those expected increased progressively with ploidy level.(iii) These trends occurred in absorption estimates of single metacentric chromosomes at metaphase in V. faba, metaphase nuclei in V. faba, and prophase nuclei in all three Vicia species.(iv) Loss of chromosomal DNA, as evidenced by a large and progressive increase in the frequency of occurrence of micronuclei in cells at higher ploidy level, was partly responsible for cell absorption estimates below expectation. (v) Variation in the density and in the absorbance of nuclear DNA may also have been a cause of absorption estimates below expectation.In our opinion, apart from the loss of chromosomal DNA to form micronuclei, it is unlikely that any real decrease in DNA content per genome occurred in cells at higher ploidy levels.

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On the interspecific comparison of nuclear DNA amounts using the Feulgen and Gallocyanin Chromalum methods

Bachmann

1969

Histochemie

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Quantitative cytophotometric studies on isolated liver cell nuclei of the bullfrog, Rana catesbeiana

Cited by 12 publications

References 17 publications

The effects of B chromosomes on the nuclear phenotype in root meristems of maize

The effects of B chromosomes on the nuclear phenotype in root meristems of maize

DNA content of colchicine-induced endopolyploid nuclei in vicia faba L.

On the interspecific comparison of nuclear DNA amounts using the Feulgen and Gallocyanin Chromalum methods

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