Influence of light on DNA content of Helianthus annuus Linnaeus.

Among four species of Angiospermae with known nuclear DNA content (Cucurbita pepo - 2.6 pg, Helianthus annuus - 12.0 pg, Vicia faba — 38.0 pg, and Tulipa kaufmanniana - 93.7 pg) the cell growth in the intermitotic period of the cell cycle has been observed to be the fastest in Vicia faba, slower in Helianthus annuus and the slowest in Cucurbita pepo and Tulipa kaufmanniana.

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Environmentally induced nuclear 2C DNA content instability in Helianthus annuus (Asteraceae)

American Journal of Botany ◽

10.1002/j.1537-2197.1996.tb13891.x ◽

1996 ◽

Vol 83 (9) ◽

pp. 1113-1120 ◽

Cited By ~ 6

Author(s):

J. Spencer Johnston ◽

Andrea Jensen ◽

Don G. Czeschin ◽

H. James Price

Keyword(s):

Helianthus Annuus ◽

Dna Content ◽

2C Dna Content

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VARIATION OF NUCLEAR DNA CONTENT IN HELIANTHUS ANNUUS (ASTERACEAE)

American Journal of Botany ◽

10.1002/j.1537-2197.1991.tb11416.x ◽

1991 ◽

Vol 78 (9) ◽

pp. 1238-1243 ◽

Cited By ~ 17

Author(s):

Martin J. Michaelson ◽

H. James Price ◽

J. Spencer Johnston ◽

John R. Ellison

Keyword(s):

Helianthus Annuus ◽

Dna Content ◽

Nuclear Dna ◽

Nuclear Dna Content

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VARIATION IN CELL-CYCLE TIME AND NUCLEAR DNA CONTENT IN THE APICAL MERISTEM OF HELIANTHUS ANNUUS L. DURING THE TRANSITION TO FLOWERING

American Journal of Botany ◽

10.1002/j.1537-2197.1984.tb12544.x ◽

1984 ◽

Vol 71 (4) ◽

pp. 588-595 ◽

Cited By ~ 5

Author(s):

Jan Marc ◽

John H. Palmer

Keyword(s):

Cell Cycle ◽

Helianthus Annuus ◽

Dna Content ◽

Cycle Time ◽

Apical Meristem ◽

Nuclear Dna ◽

Nuclear Dna Content ◽

Cell Cycle Time ◽

Helianthus Annuus L ◽

Transition To Flowering

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DNA endoreplication level in endosperm and in cotyledons during seed development in three dicotyledonous species

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1991.020 ◽

2014 ◽

Vol 60 (3-4) ◽

pp. 273-284 ◽

Cited By ~ 4

Author(s):

Kazimierz Marciniak

Keyword(s):

Pisum Sativum ◽

Helianthus Annuus ◽

Vicia Faba ◽

Seed Development ◽

Dna Content ◽

Cellular Endosperm ◽

Dna Endoreplication ◽

Species Specific

The DNA content of nuclear and cellular endosperm and in cotyledons in the course of seed development in Helianthus annuus, Pisum sativum and Vicia faba was cytophotometrically measured after Faulgen's reaction. Helianthus annuus is characterized by the lowest endoreplication dynamics attaining a maximum DNA content of 48C in nuclear endosperm, which corresponds to four endoreplication rounds, and 16C DNA (three rounds) in cotyledons. In Pisum sativum cellular endosperm in the studied stages of seed development was absent and the highest DNA content in cotyledons was 512C DNA; this corresponds to eight endoreplication rounds. In Vicia faba, the maximum DNA endoreplication level was 1536C in nuclear endosperm, which corresponds to nine endoreplication rounds; in cotyledons the maximum DNA content was 64C (five rounds). In the course of seed development, differences in the dynamics of DNA endoreplication in throphic tissues of the examined species seem to be similar to differences in the endoreplication level in root and leaf parenchyma, but the DNA endoreplication level is much higher in throphic tissues. Therefore, the endoreplication pattern might be species-specific and genetically conditioned.

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Nuclear DNA content in differentiated tissues of sunflower (Helianthus annuus L.)

PROTOPLASMA ◽

10.1007/bf01276590 ◽

1986 ◽

Vol 130 (2-3) ◽

pp. 91-97 ◽

Cited By ~ 24

Author(s):

A. Cavallini ◽

P. G. Cionini

Keyword(s):

Helianthus Annuus ◽

Dna Content ◽

Nuclear Dna ◽

Nuclear Dna Content ◽

Helianthus Annuus L

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Head Size and DNA Content in Bacteriophage T4

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100094255 ◽

1972 ◽

Vol 30 ◽

pp. 200-201

Author(s):

Fred Eiserling ◽

A. H. Doermann ◽

Linde Boehner

Keyword(s):

Electron Microscopy ◽

Dna Content ◽

Bacteriophage T4 ◽

Head Size ◽

Virus Particles ◽

Altered Protein ◽

A Cell ◽

Bacterial Viruses ◽

A Site ◽

Protein Shell

The control of form or shape inheritance can be approached by studying the morphogenesis of bacterial viruses. Shape variants of bacteriophage T4 with altered protein shell (capsid) size and nucleic acid (DNA) content have been found by electron microscopy, and a mutant (E920g in gene 66) controlling head size has been described. This mutant produces short-headed particles which contain 2/3 the normal DNA content and which are non-viable when only one particle infects a cell (Fig. 1).We report here the isolation of a new mutant (191c) which also appears to be in gene 66 but at a site distinct from E920g. The most striking phenotype of the mutant is the production of about 10% of the phage yield as “giant” virus particles, from 3 to 8 times longer than normal phage (Fig. 2).

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