ArticleBMC plant biology2012
Expression conservation within the circadian clock of a monocot: natural variation at barley Ppd-H1 affects circadian expression of flowering time genes, but not clock orthologs.
Article in BMC plant biology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.
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69 citing papers in PubMed, 139 citations in OpenAlex.
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- Phenotyping the hidden half: combining UAV phenotyping and machine learning to predict barley root traits in the field.Journal of experimental botany · 2025Article
- Pangenome insights into structural variation and functional diversification of barley CCT motif genes.The plant genome · 2025Article
- Ambient temperature influenced co-expression network of major developmental, circadian, and photoreceptor genes in bread wheat.Scientific reports · 2025Article
- PHOTOPERIOD 1 enhances stress resistance and energy metabolism to promote spike fertility in barley under high ambient temperatures.Plant physiology · 2025Article
- Molecular genetic regulation of the vegetative-generative transition in wheat from an environmental perspective.Annals of botany · 2025Review
- Molecular characterization of PSEUDO RESPONSE REGULATOR family in Rosaceae and function of PbPRR59a and PbPRR59b in flowering regulation.BMC genomics · 2024Article
- Investigating the genetic control of plant development in spring barley under speed breeding conditions.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2024Article
- early maturity 7 promotes early flowering by controlling the light input into the circadian clock in barley.Plant physiology · 2024Article
- Novel exotic alleles of EARLY FLOWERING 3 determine plant development in barley.Journal of experimental botany · 2023Article
- New Horizons in Plant Photoperiodism.Annual review of plant biology · 2023Review
- PHYTOCHROME C regulation of photoperiodic flowering via PHOTOPERIOD1 is mediated by EARLY FLOWERING 3 in Brachypodium distachyon.PLoS genetics · 2023Article
- EARLY FLOWERING 3 interactions with PHYTOCHROME B and PHOTOPERIOD1 are critical for the photoperiodic regulation of wheat heading time.PLoS genetics · 2023Article
- Genome-wide association study of agronomical and root-related traits in spring barley collection grown under field conditions.Frontiers in plant science · 2023Article
- Far-Red Light Coordinates the Diurnal Changes in the Transcripts Related to Nitrate Reduction, Glutathione Metabolism and Antioxidant Enzymes in Barley.International journal of molecular sciences · 2022Article
- The evening complex integrates photoperiod signals to control flowering in rice.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- MiR172-APETALA2-like genes integrate vernalization and plant age to control flowering time in wheat.PLoS genetics · 2022Article
- The evolution and function of the PSEUDO RESPONSE REGULATOR gene family in the plant circadian clock.Genetics and molecular biology · 2022Article
- Hybrids Provide More Options for Fine-Tuning Flowering Time Responses of Winter Barley.Frontiers in plant science · 2022Article
9 more citing papers are in PubMed but not listed here.
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4 authors at 2 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundThe circadian clock is an endogenous mechanism that coordinates biological processes with daily changes in the environment. In plants, circadian rhythms contribute to both agricultural productivity and evolutionary fitness. In barley, the photoperiod response regulator and flowering-time gene Ppd-H1 is orthologous to the Arabidopsis core-clock gene PRR7. However, relatively little is known about the role of Ppd-H1 and other components of the circadian clock in temperate crop species. In this study, we identified barley clock orthologs and tested the effects of natural genetic variation at Ppd-H1 on diurnal and circadian expression of clock and output genes from the photoperiod-response pathway.
resultsBarley clock orthologs HvCCA1, HvGI, HvPRR1, HvPRR37 (Ppd-H1), HvPRR73, HvPRR59 and HvPRR95 showed a high level of sequence similarity and conservation of diurnal and circadian expression patterns, when compared to Arabidopsis. The natural mutation at Ppd-H1 did not affect diurnal or circadian cycling of barley clock genes. However, the Ppd-H1 mutant was found to be arrhythmic under free-running conditions for the photoperiod-response genes HvCO1, HvCO2, and the MADS-box transcription factor and vernalization responsive gene Vrn-H1.
conclusionWe suggest that the described eudicot clock is largely conserved in the monocot barley. However, genetic differentiation within gene families and differences in the function of Ppd-H1 suggest evolutionary modification in the angiosperm clock. Our data indicates that natural variation at Ppd-H1 does not affect the expression level of clock genes, but controls photoperiodic output genes. Circadian control of Vrn-H1 in barley suggests that this vernalization responsive gene is also controlled by the photoperiod-response pathway. Structural and functional characterization of the barley circadian clock will set the basis for future studies of the adaptive significance of the circadian clock in Triticeae species.
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