title: A High Temperature-Dependent Mitochondrial Lipase EXTRA GLUME1 Promotes Floral Phenotypic Robustness against Temperature Fluctuation in Rice (Oryza sativa L.).
abstract: The sessile plants have evolved diverse intrinsic mechanisms to control their proper development under variable environments. In contrast to plastic vegetative development, reproductive traits like floral identity often show phenotypic robustness against environmental variations. However, it remains obscure about the molecular basis of this phenotypic robustness. In this study, we found that eg1 (extra glume1) mutants of rice (Oryza savita L.) showed floral phenotypic variations in different growth locations resulting in a breakdown of floral identity robustness. Physiological and biochemical analyses showed that EG1 encodes a predominantly mitochondria-localized functional lipase and functions in a high temperature-dependent manner. Furthermore, we found that numerous environmentally responsive genes including many floral identity genes are transcriptionally repressed in eg1 mutants and OsMADS1, OsMADS6 and OsG1 genetically act downstream of EG1 to maintain floral robustness. Collectively, our results demonstrate that EG1 promotes floral robustness against temperature fluctuation by safeguarding the expression of floral identify genes through a high temperature-dependent mitochondrial lipid pathway and uncovers a novel mechanistic insight into floral developmental control.
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.|University of Chinese Academy of Sciences, Beijing, the People's Republic of China.
authors.forename: Biyao
authors.initials: B
authors.lastname: Zhang
authors.affiliation: University of Chinese Academy of Sciences, Beijing, the People's Republic of China.|State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, the People's Republic of China.
authors.forename: Shaohuan
authors.identifier: 0000-0001-6340-1862
authors.initials: S
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.
authors.forename: Yu'e
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.
authors.forename: Ting
authors.initials: T
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.|University of Chinese Academy of Sciences, Beijing, the People's Republic of China.
authors.forename: Feifei
authors.initials: F
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.|University of Chinese Academy of Sciences, Beijing, the People's Republic of China.
authors.forename: Huashan
authors.initials: H
authors.lastname: Tang
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.|University of Chinese Academy of Sciences, Beijing, the People's Republic of China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.|University of Chinese Academy of Sciences, Beijing, the People's Republic of China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, the People's Republic of China.
authors.forename: Wenfeng
authors.initials: W
authors.lastname: Qian
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing, the People's Republic of China.|Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, the People's Republic of China.|Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai, the People's Republic of China.
authors.forename: Yongbiao
authors.initials: Y
authors.lastname: Xue
mesh_terms: D000483:Alleles; D004777:Environment; D035264:Flowers / Q000502:physiology*; D018506:Gene Expression Regulation, Plant; D005838:Genotype; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D006358:Hot Temperature; D006801:Humans; D008049:Lipase / Q000235:genetics* / Q000378:metabolism; D008055:Lipids / Q000737:chemistry; D008928:Mitochondria / Q000201:enzymology*; D009154:Mutation; D012275:Oryza / Q000201:enzymology / Q000235:genetics*; D010641:Phenotype; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D000072417:Protein Domains; D014158:Transcription, Genetic; D059467:Transcriptome
chemical_list: D008055:Lipids; D010940:Plant Proteins; D049452:Green Fluorescent Proteins; D008049:Lipase