title: RPL1, a gene involved in epigenetic processes regulates phenotypic plasticity in rice.
abstract: Organisms can adjust their phenotype in response to changing environmental conditions. This phenomenon is termed phenotypic plasticity. Despite its ubiquitous occurrence, there has been very little study on the molecular mechanism of phenotypic plasticity. In this study, we isolated a rice (Oryza sativa L.) mutant, rice plasticity 1 (rpl1), that displayed increased environment-dependent phenotypic variations. RPL1 was expressed in all tissues examined. The protein was localized in the nucleus and its distribution in the nucleus overlapped with heterochromatin. The rpl1 mutation led to an increase in DNA methylation on repetitive sequences and a decrease in overall histone acetylation. In addition, the mutation affected responses of the rice plant to phytohormones such as brassinosteroid, gibberellin, and cytokinin. Analysis of the putative rice brassinosteroid receptor OsBRI1, a key hormone signaling gene, indicated that RPL1 may be involved in the regulation of epigenomic modification of the gene. These data suggest that RPL1 regulated phenotypic plasticity likely through its involvement in epigenetic processes affecting responses of the plant to phytohormones.
authors: National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China.
authors: Cui-Cui
authors: CC
authors: Zhang
authors: Wen-Ya
authors: WY
authors: Yuan
authors: Qi-Fa
authors: QF
authors: Zhang
mesh_terms: D015139:Blotting, Southern; D015153:Blotting, Western; D060406:Brassinosteroids / Q000494:pharmacology; D002467:Cell Nucleus / Q000187:drug effects / Q000378:metabolism; D002681:China; D003583:Cytokinins / Q000235:genetics; D019175:DNA Methylation / Q000187:drug effects; D044127:Epigenesis, Genetic / Q000187:drug effects; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D017343:Genes, Plant / Q000235:genetics*; D005875:Gibberellins / Q000378:metabolism; D006657:Histones / Q000378:metabolism; D009154:Mutation / Q000235:genetics; D012275:Oryza / Q000033:anatomy & histology* / Q000187:drug effects / Q000235:genetics*; D010641:Phenotype; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D011499:Protein Processing, Post-Translational / Q000187:drug effects; D021381:Protein Transport / Q000187:drug effects; D019655:Quantitative Trait, Heritable; D012621:Seasons; D015398:Signal Transduction / Q000235:genetics; D013260:Steroids, Heterocyclic / Q000494:pharmacology
chemical_list: D060406:Brassinosteroids; D003583:Cytokinins; D005875:Gibberellins; D006657:Histones; D010940:Plant Proteins; D013260:Steroids, Heterocyclic; C023623:brassinolide