title: Nitrogen deficiency system is helpful in characterizing regulation mechanisms of ectopic triacylglycerol accumulation in Arabidopsis seedlings.
abstract: Triacylglycerol (TAG) is the major storage component accumulated in seed. However the regulatory mechanism of TAG synthesis and accumulation in non-seed tissues remains unknown. Recently, we found that nitrogen (N) deficiency (0.1mM N) caused an inducement of TAG biosynthesis in Arabidopsis seedlings. ABSCISIC ACID INSENSITIVE 4 (ABI4) was essential for the activation of Acyl-CoA:diacylglycerol acyltransferase1(DGAT1) expression during N deficiency in Arabidopsis seedlings. In this addendum, we further discussed the approaches to provide a net increase in total oil production in higher plants by using the low N platform. First, the N-deficient seedlings can be used to determine the key factors that regulate the ectopic expression of key genes in TAG metabolism. Second, the research on the relationship between TAG homeostasis and cell division will be helpful to find the key factors that specifically regulate TAG accumulation under the nutrient-limited condition.
authors: State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, China.
authors: Yang
authors: Y
authors: Yang
authors: Xiangchun
authors: X
authors: Yu
authors: Lianfen
authors: L
authors: Song
authors: Chengcai
authors: C
authors: An
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000378:metabolism; D051048:Diacylglycerol O-Acyltransferase / Q000235:genetics / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D009584:Nitrogen / Q000172:deficiency* / Q000378:metabolism; D010938:Plant Oils / Q000378:metabolism; D036226:Seedlings / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism; D014280:Triglycerides / Q000096:biosynthesis*
chemical_list: C470421:ABI4 protein, Arabidopsis; D029681:Arabidopsis Proteins; D010938:Plant Oils; D014157:Transcription Factors; D014280:Triglycerides; D051048:Diacylglycerol O-Acyltransferase; D009584:Nitrogen