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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Vydané v:	The New phytologist Ročník 248; číslo 4; s. 1877 - 1891
Hlavní autori:	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.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	England Wiley Subscription Services, Inc 01.11.2025
Predmet:	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
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Shrnutí:	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.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	0028-646X 1469-8137 1469-8137
DOI:	10.1111/nph.70565