Genetics and Development of an Unstable Chlorophyll Deficiency in Lycopersicon esculentum

Rick, Charles M.; Thompson, A. E.; Brauer, Oscar

doi:10.2307/2439284

Cited by 14 publications

(9 citation statements)

References 4 publications

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“…We and others (Wetzel et al, 1994;Bartley and Scolnik, 1995) reported that there are phenotypic similarities between im and the well-known ghost (gh) variegation mutant of tomato (Rick et al, 1959) (Figure 4). Like im, variegation arises in gh due to the action of a nuclear recessive gene (Rick et al, 1959); the white gh sectors accumulate phytoene (Rick et al, 1959;Mackinney et al, 1956;Scolnik et al, 1987); and white sector formation in gh is promoted by elevated light intensities (Rick et al, 1959;Scolnik et al, 1987).…”

Section: Im and Gh Are Orthologous Genesmentioning

confidence: 83%

“…Like im, variegation arises in gh due to the action of a nuclear recessive gene (Rick et al, 1959); the white gh sectors accumulate phytoene (Rick et al, 1959;Mackinney et al, 1956;Scolnik et al, 1987); and white sector formation in gh is promoted by elevated light intensities (Rick et al, 1959;Scolnik et al, 1987). The im and gh mutants appear to arise from mutations in orthologous genes ; R. Bae, C. Wetzel, and S. Rodermel, unpublished observations).…”

Section: Im and Gh Are Orthologous Genesmentioning

confidence: 95%

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Arabidopsis Variegation Mutants

Rodermel¹

2002

The Arabidopsis Book

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Section: Im and Gh Are Orthologous Genesmentioning

confidence: 83%

Section: Im and Gh Are Orthologous Genesmentioning

confidence: 95%

Arabidopsis Variegation Mutants

Rodermel¹

2002

The Arabidopsis Book

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“…The effects of the dag mutation suggest that the light stimulation of leaf expansion in dicots works through events occurring in the early stages of chloroplast differentiation. The ghost mutant of tomato (Rick et al, 1959) is phenotypically very similar to dag. It is unstable but does not revert germinally, so the basis of its somatic instability may be epigenetic.…”

Section: Discussionmentioning

confidence: 99%

DAG, a gene required for chloroplast differentiation and palisade development in Antirrhinum majus.

et al. 1996

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We have identified a mutation at the DAG locus of Antirrhinum majus which blocks the development of chloroplasts to give white leaves with green revertant sectors. The green areas contain normal chloroplasts whereas the white areas have small plastids that resemble proplastids. The cotyledons of dark‐grown dag mutant seedlings have plastids which also resemble proplastids. The palisade cells in the white areas of dag mutant leaves also lack their characteristic columnar shape. The DAG locus was cloned by transposon tagging: DAG encodes a novel protein with a predicted Mr of 26k, which is targeted to the plastids. Cleavage of its predicted transit peptide gives a mature protein of Mr 20k. Screening of databases and analysis of Southern blots gave evidence that DAG belongs to a protein family with homology to several proteins of unknown function from plants. Expression of DAG is required for expression of nuclear genes affecting the chloroplasts, such as CAB and RBCS, and also for expression of the plastidial gene RPOB encoding the plastidial RNA polymerase beta subunit, indicating that it functions very early in chloroplast development.

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“…The intra-plant variation observed in narrow substantiates this view. A phenotypic variation indicating the presence of a gene which is sensitive to environmental factors was observed by Rick, Thompson, and Brauer (1959) in the tomato mutant ghost and also by Rana (1964) in a mutant in Chrysanthemum. Similarly, environmental differences such as varying levels of chemical factors in the young fruit, particularly at early, critical stages of embryogenesis, might account for the distinct morphological differences which are evident in the homozygous mutant seedlings.…”

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confidence: 99%

Morphogenetic Aspects of a Leafless Mutant in Tomato I. General Patterns in Development

Caruso

1968

American J of Botany

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The embryo of the reduced form of the lanceolaie mutant in tomato fails to undergo the heartshaped stage of development. Cells in the shoot apical region of this leafless mutant lose their meristematic character and develop into mature parenchyma during embryogenesis. This early loss of meristem tissue leads to the determinate growth which is evident in the seedling. In contrast to normal, starch grains are visible with the light microscope in cells of the shoot tip of the mutant hypocotyl from early embryogeny up to and including the seedling stage, and protein bodies are abundant in the same tissue of fully developed mutant embryos. The shoot apical region in homozygous mutant embryos with cotyledons or cotyledon-like structures exhibits some cytochemical and morphological similarity with the normal shoot apex. Morphological variation in these forms appears to be in a continuous pattern. The extent of their development and consequent longevity is related to possible differences in rates of cell expansion and variation in environmental factors during the early stages of embryogenesis.

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Genetics and Development of an Unstable Chlorophyll Deficiency in Lycopersicon esculentum

Cited by 14 publications

References 4 publications

Arabidopsis Variegation Mutants

Arabidopsis Variegation Mutants

DAG, a gene required for chloroplast differentiation and palisade development in Antirrhinum majus.

Morphogenetic Aspects of a Leafless Mutant in Tomato I. General Patterns in Development

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