Variegation mutants and mechanisms of chloroplast biogenesis
10.1111/j.1365-3040.2006.01630.x
Crossref journal-article
Wiley
Plant, Cell & Environment (311)
Abstract

ABSTRACTVariegated plants typically have green‐ and white‐sectored leaves. Cells in the green sectors contain normal‐appearing chloroplasts, whereas cells in the white sectors lack pigments and appear to be blocked at various stages of chloroplast biogenesis. Variegations can be caused by mutations in nuclear, chloroplast or mitochondrial genes. In some plants, the green and white sectors have different genotypes, but in others they have the same (mutant) genotype. One advantage of variegations is that they provide a means of studying genes for proteins that are important for chloroplast development, but for which mutant analysis is difficult, either because mutations in a gene of interest are lethal or because they do not show a readily distinguishable phenotype. This paper focuses on Arabidopsis variegations, for which the most information is available at the molecular level. Perhaps the most interesting of these are variegations caused by defective nuclear gene products in which the cells of the mutant have a uniform genotype. Two questions are of paramount interest: (1) What is the gene product and how does it function in chloroplast biogenesis? (2) What is the mechanism of variegation and why do green sectors arise in plants with a uniform (mutant) genotype? Two paradigms of variegation mechanism are described: immutans (im) and variegated2 (var2). Both mechanisms emphasize compensating activities and the notion of plastid autonomy, but redundant gene products are proposed to play a role in var2, but not in im. It is hypothesized that threshold levels of certain activities are necessary for normal chloroplast development.

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YU, F., FU, A., ALURU, M., PARK, S., XU, Y., LIU, H., LIU, X., FOUDREE, A., NAMBOGGA, M., & RODERMEL, S. (2007). Variegation mutants and mechanisms of chloroplast biogenesis. Plant, Cell & Environment, 30(3), 350–365. Portico.

Authors 10
  1. FEI YU (first)
  2. AIGEN FU (additional)
  3. MANEESHA ALURU (additional)
  4. SUNGSOON PARK (additional)
  5. YANG XU (additional)
  6. HUIYING LIU (additional)
  7. XIAYAN LIU (additional)
  8. ANDREW FOUDREE (additional)
  9. MILLY NAMBOGGA (additional)
  10. STEVEN RODERMEL (additional)
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Dates
Type When
Created 18 years, 7 months ago (Jan. 11, 2007, 7:48 a.m.)
Deposited 1 year, 11 months ago (Sept. 26, 2023, 4:17 a.m.)
Indexed 4 days, 2 hours ago (Aug. 27, 2025, 12:09 p.m.)
Issued 18 years, 7 months ago (Jan. 11, 2007)
Published 18 years, 7 months ago (Jan. 11, 2007)
Published Online 18 years, 7 months ago (Jan. 11, 2007)
Published Print 18 years, 5 months ago (March 1, 2007)
Funders 0

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@article{YU_2007, title={Variegation mutants and mechanisms of chloroplast biogenesis}, volume={30}, ISSN={1365-3040}, url={http://dx.doi.org/10.1111/j.1365-3040.2006.01630.x}, DOI={10.1111/j.1365-3040.2006.01630.x}, number={3}, journal={Plant, Cell & Environment}, publisher={Wiley}, author={YU, FEI and FU, AIGEN and ALURU, MANEESHA and PARK, SUNGSOON and XU, YANG and LIU, HUIYING and LIU, XIAYAN and FOUDREE, ANDREW and NAMBOGGA, MILLY and RODERMEL, STEVEN}, year={2007}, month=jan, pages={350–365} }