A novel role for histone methyltransferase KYP/SUVH4 in the control of Arabidopsis primary seed dormancy
Copyright policy )A novel role for histone methyltransferase KYP/SUVH4 in the control of Arabidopsis primary seed dormancy
• Seed dormancy controls germination and plays a crucial role in the life cycle of plants. Chromatin modifications are involved in the regulation of seed dormancy; however, little is known about the underlying mechanism. • KYP/SUVH4 is required for histone H3 lysine 9 dimethylation. Mutations in this gene cause increased seed dormancy. KYP/SUVH4-overexpressing Arabidopsis plants show decreased dormancy. KYP/SUVH4 expression is regulated by abscisic acid (ABA) and gibberellins (GA). The sensitivity of seed germination to ABA and paclobutrazol (PAC) is enhanced slightly in kryptonite-2 (kyp-2) and suvh4-2/suvh5 mutants, but weakened in KYP/SUVH4-overexpressing plants. • In the kyp-2 mutant, several dormancy-related genes, including DOG1 and ABI3, show increased expression levels, in agreement with a negative role for KYP/SUVH4 in gene transcription. • Genetic analysis showed that DOG1 and HUB1 are epistatic to KYP/SUVH4, suggesting that these genes regulate seed dormancy in the same genetic pathway.
- Chinese Academy of Sciences China (People's Republic of)
- Max Planck Institute for Plant Breeding Research Germany
- Beijing University of Agriculture China (People's Republic of)
- Institute of Botany China (People's Republic of)
- Max Planck Society Germany
Genotype, Arabidopsis Proteins, Arabidopsis, Histone-Lysine N-Methyltransferase, Triazoles, Genes, Plant, Plant Dormancy, Plants, Genetically Modified, Gene Expression Regulation, Enzymologic, Gibberellins, Gene Knockout Techniques, Mutagenesis, Insertional, Phenotype, Gene Expression Regulation, Plant, Mutation, RNA, Messenger, Abscisic Acid
Genotype, Arabidopsis Proteins, Arabidopsis, Histone-Lysine N-Methyltransferase, Triazoles, Genes, Plant, Plant Dormancy, Plants, Genetically Modified, Gene Expression Regulation, Enzymologic, Gibberellins, Gene Knockout Techniques, Mutagenesis, Insertional, Phenotype, Gene Expression Regulation, Plant, Mutation, RNA, Messenger, Abscisic Acid
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