title: Indeterminate domain 10 regulates ammonium-mediated gene expression in rice roots.
abstract: Indeterminate domain (IDD) genes are a family of plant transcriptional regulators that function in the control of development and metabolism during growth. Here, the function of Oryza sativa indeterminate domain 10 (OsIDD10) has been explored in rice plants. Compared with wild-type roots, idd10 mutant roots are hypersensitive to exogenous ammonium. This work aims to define the action of IDD10 on gene expression involved in ammonium uptake and nitrogen (N) metabolism. The ammonium induction of key ammonium uptake and assimilation genes was examined in the roots of idd10 mutants and IDD10 overexpressors. Molecular studies and transcriptome analysis were performed to identify target genes and IDD10 binding cis-elements. IDD10 activates the transcription of AMT1;2 and GDH2 by binding to a cis-element motif present in the promoter region of AMT1;2 and in the fifth intron of GDH2. IDD10 contributes significantly to the induction of several genes involved in N-linked metabolic and cellular responses, including genes encoding glutamine synthetase 2, nitrite reductases and trehalose-6-phosphate synthase. Furthermore, the possibility that IDD10 might influence the N-mediated feedback regulation of target genes was examined. This study demonstrates that IDD10 is involved in regulatory circuits that determine N-mediated gene expression in plant roots.
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Yuan Hu
authors.initials: YH
authors.lastname: Xuan
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Ryza A
authors.initials: RA
authors.lastname: Priatama
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Jin
authors.initials: J
authors.lastname: Huang
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Byoung Il
authors.initials: BI
authors.lastname: Je
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Jing Miao
authors.initials: JM
authors.lastname: Liu
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Soon Ju
authors.initials: SJ
authors.lastname: Park
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Hai Long
authors.initials: HL
authors.lastname: Piao
authors.affiliation: Department of Applied Biology, Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Dae Young
authors.initials: DY
authors.lastname: Son
authors.affiliation: Department of Applied Biology, Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Jeung Joo
authors.initials: JJ
authors.lastname: Lee
authors.affiliation: National Academy of Agricultural Science, Rural Development Administration, Suwon, 441-857, South Korea.
authors.forename: Sung Han
authors.initials: SH
authors.lastname: Park
authors.affiliation: Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, South Korea.
authors.forename: Ki Hong
authors.initials: KH
authors.lastname: Jung
authors.affiliation: Genomics Division, Department of Agricultural Biotechnology, National Academy of Agricultural Science (NAAS), RDA, Suwon, 441-707, South Korea.
authors.forename: Tae Ho
authors.initials: TH
authors.lastname: Kim
authors.affiliation: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju, 660-701, South Korea.
authors.forename: Chang-Deok
authors.initials: CD
authors.lastname: Han
mesh_terms: D000595:Amino Acid Sequence; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D005973:Glutamine / Q000494:pharmacology; D008717:Methionine Sulfoximine / Q000494:pharmacology; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D009584:Nitrogen / Q000378:metabolism; D012275:Oryza / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism; D010641:Phenotype; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D018517:Plant Roots / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology*; D016415:Sequence Alignment; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism / Q000502:physiology*
chemical_list: D010940:Plant Proteins; D000644:Quaternary Ammonium Compounds; D014157:Transcription Factors; D005973:Glutamine; D008717:Methionine Sulfoximine; D009584:Nitrogen