A circadian transcriptional subnetwork and EARLY FLOWERING 3 control timing of senescence and grain nutrition in bread wheat

Summary Circadian clocks control daily and seasonal timing of physiology and development. Because of their influence on photoperiodic flowering, variants in circadian clock genes have been selected for phenology during domestication of cereal crops. To explore the potential impact of this genetic va...

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Bibliographic Details
Published in:The New phytologist Vol. 248; no. 4; pp. 1877 - 1891
Main Authors: Buckley, Christopher R., Boyte, Joshua M., Liu, Yalin, Albiston, Robert L., Hyles, Jessica, Beasley, Jesse T., Johnson, Alexander A.T., Trevaskis, Ben, Fournier‐Level, Alexandre, Haydon, Michael J.
Format: Journal Article
Language:English
Published: England Wiley Subscription Services, Inc 01.11.2025
Subjects:
Biological clocks
Bread
Cereal crops
circadian clock
Circadian Clocks - genetics
Circadian rhythm
Circadian Rhythm - genetics
Circadian rhythms
Cultivars
Deletion
Domestication
Edible Grain - genetics
Edible Grain - physiology
Flowering
Flowers - genetics
Flowers - physiology
Gene deletion
Gene Expression Regulation, Plant
Gene Regulatory Networks
Gene sequencing
Genes
Genes, Plant
Genetic diversity
Genetic variation
Genotype
Genotypes
GPC
Grain
grain nutrition
leaf senescence
Leaves
multilocus genotype
Nutrient content
Nutrition
OzWheat
Phenology
Phenotype
Plant Leaves - genetics
Plant Leaves - physiology
Plant Proteins - genetics
Plant Proteins - metabolism
Plant Senescence - genetics
RNA sequencing
Senescence
Time Factors
Transcription, Genetic
Transcriptome
Transcriptome - genetics
Transcriptomes
Triticum - genetics
Triticum - physiology
Triticum aestivum
Wheat
multilocus genotype
grain nutrition
OzWheat
GPC
circadian clock
Triticum aestivum
leaf senescence
ISSN:0028-646X, 1469-8137, 1469-8137
Online Access:Get full text
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Summary:Summary Circadian clocks control daily and seasonal timing of physiology and development. Because of their influence on photoperiodic flowering, variants in circadian clock genes have been selected for phenology during domestication of cereal crops. To explore the potential impact of this genetic variation on circadian‐regulated traits, we investigated the relationship between the circadian clock and leaf senescence in hexaploid bread wheat. We phenotyped a collection of elite wheat cultivars for circadian rhythms, senescence and grain nutrition and used genotypes of multiple circadian clock genes to assign cultivars to circadian multilocus genotypes (MLGs). We compared the circadian‐regulated transcriptomes in mature and senescent leaves by RNA sequencing and used near‐isogenic lines (NILs) of a deletion in EARLY FLOWERING 3‐D1 (ELF3‐D1), a known phenology locus, to test for a functional contribution to the timing of senescence and grain protein content (GPC). We detected variation in circadian rhythms between wheat cultivars, which was significantly associated with the timing of senescence. We revealed substantial reorganisation of the circadian‐regulated transcriptome during senescence and identified a transcriptional subnetwork representing a link between the circadian oscillator and regulators of leaf senescence. NILs of an ELF3‐D1 deletion confirmed a significant effect on the timing of senescence and GPC. Our results demonstrate an important role for the circadian clock in controlling the timing of senescence in wheat, which highlights potential consequences of circadian clock genes selected for phenology on other valuable crop traits.
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ISSN:0028-646X
1469-8137
1469-8137
DOI:10.1111/nph.70565