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Cited by 219

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The AtCAO gene, encoding chlorophyll a oxygenase, is required for chlorophyll b synthesis in Arabidopsis thaliana

Open access
Espineda, Cromwell E., Linford, Alicia S., Devine, Domenica, Brusslan, Judy A.·1999·Proceedings of the National Academy of Sciences

Abstract

Chlorophyll b is synthesized from chlorophyll a and is found in the light-harvesting complexes of prochlorophytes, green algae, and both nonvascular and vascular plants. We have used conserved motifs from the chlorophyll a oxygenase ( CAO ) gene from Chlamydomonas reinhardtii to isolate a homologue from Arabidopsis thaliana . This gene, AtCAO , is mutated in both leaky and null chlorina1 alleles, and DNA sequence changes cosegregate with the mutant phenotype. AtCAO mRNA levels are higher in three different mutants that have reduced levels of chlorophyll b , suggesting that plants that do not have sufficient chlorophyll b up-regulate AtCAO gene expression. Additionally, AtCAO mRNA levels decrease in plants that are grown under dim-light conditions. We have also found that the six major Lhcb proteins do not accumulate in the null ch1 - 3 allele.

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Metadata

Authors
Espineda, C. E., Linford, A. S., Devine, D., & Brusslan, J. A.
Venue
Proceedings of the National Academy of Sciences
Published
1999-08-31
Volume
96
Issue
18
Pages
10507-10511
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2093688162
Cited by
219
References
1
FWCI
1.30
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The AtCAO gene, encoding chlorophyll a oxygenase, is required for chlorophyll b synthesis in Arabidopsis thaliana. https://app.cochat.ai/papers/10.1073/pnas.96.18.10507
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Espineda, C. E., Linford, A. S., Devine, D., & Brusslan, J. A. (1999). The AtCAO gene, encoding chlorophyll a oxygenase, is required for chlorophyll b synthesis in Arabidopsis thaliana. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.96.18.10507

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