Evidence map›Paper›PMID 27467757›Full record

ArticlePLoS genetics2016

Temporal Shift of Circadian-Mediated Gene Expression and Carbon Fixation Contributes to Biomass Heterosis in Maize Hybrids.

Dae Kwan Ko, Dominica Rohozinski, Qingxin Song, Samuel H Taylor, Thomas E Juenger, Frank G Harmon, Z Jeffrey Chen

Open access · goldAbstract read
In one paragraph

Article in PLoS genetics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed
8.7field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

70 citing papers in PubMed, 117 citations in OpenAlex.

  1. Diurnal dynamics of maize gene expression is associated with phyllosphere microbiome composition.International microbiology : the official journal of the Spanish Society for Microbiology · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Machine learning-based prediction of dynamic heterosis for plant height with pathway biomarkers in rice.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2026
    Article
  6. Article
  7. Review
  8. Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article

10 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 1 country.

Dae Kwan KoDepartment of Molecular Biosciences, The University of Texas at Austin, Austin, Texas, United States of America.
Dominica RohozinskiPlant Gene Expression Center, USDA-ARS, Albany, California, United States of America.
Qingxin SongDepartment of Molecular Biosciences, The University of Texas at Austin, Austin, Texas, United States of America.
Samuel H TaylorDepartment of Integrative Biology, Center for Computational Biology and Bioinformatics, and Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, Texas, United States of America.ORCID 0000-0001-9714-0656
Thomas E JuengerDepartment of Integrative Biology, Center for Computational Biology and Bioinformatics, and Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, Texas, United States of America.
Frank G HarmonPlant Gene Expression Center, USDA-ARS, Albany, California, United States of America.ORCID 0000-0001-7017-5373
Z Jeffrey ChenDepartment of Molecular Biosciences, The University of Texas at Austin, Austin, Texas, United States of America.ORCID 0000-0001-5006-8036
The University of Texas at Austin · USPlant Gene Expression Center · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Heterosis has been widely used in agriculture, but the molecular mechanism for this remains largely elusive. In Arabidopsis hybrids and allopolyploids, increased photosynthetic and metabolic activities are linked to altered expression of circadian clock regulators, including CIRCADIAN CLOCK ASSOCIATED1 (CCA1). It is unknown whether a similar mechanism mediates heterosis in maize hybrids. Here we report that higher levels of carbon fixation and starch accumulation in the maize hybrids are associated with altered temporal gene expression. Two maize CCA1 homologs, ZmCCA1a and ZmCCA1b, are diurnally up-regulated in the hybrids. Expressing ZmCCA1 complements the cca1 mutant phenotype in Arabidopsis, and overexpressing ZmCCA1b disrupts circadian rhythms and biomass heterosis. Furthermore, overexpressing ZmCCA1b in maize reduced chlorophyll content and plant height. Reduced height stems from reduced node elongation but not total node number in both greenhouse and field conditions. Phenotypes are less severe in the field than in the greenhouse, suggesting that enhanced light and/or metabolic activities in the field can compensate for altered circadian regulation in growth vigor. Chromatin immunoprecipitation-sequencing (ChIP-seq) analysis reveals a temporal shift of ZmCCA1-binding targets to the early morning in the hybrids, suggesting that activation of morning-phased genes in the hybrids promotes photosynthesis and growth vigor. This temporal shift of ZmCCA1-binding targets correlated with nonadditive and additive gene expression in early and late stages of seedling development. These results could guide breeding better hybrid crops to meet the growing demand in food and bioenergy.

Indexed as

ArabidopsisArabidopsis ProteinsBiomassCarbon CycleCircadian ClocksCircadian RhythmGene Expression Regulation, PlantHybridization, GeneticHybrid VigorPhotosynthesisSeedlingsStarchTranscription FactorsZea maysArabidopsis ProteinsCCA1 protein, ArabidopsisStarchTranscription Factors

Identifiers

PMID27467757
PMCPMC4965137
OpenAlexW2481924638

What OpenQuestion holds

Textmetadata
LicenceCC0
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.