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Regulation of FATTY ACID ELONGATION1 expression and production in Brassica oleracea and Capsella rubella.
Li, Dinghong; Lei, Zhao; Xue, Jiayu; Zhou, Guangcan; Hang, Yueyu; Sun, Xiaoqin.
Afiliación
  • Li D; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, No. 1 Qianhu Houcun, Nanjing, 210014, Jiangsu, China.
  • Lei Z; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, No. 1 Qianhu Houcun, Nanjing, 210014, Jiangsu, China.
  • Xue J; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, No. 1 Qianhu Houcun, Nanjing, 210014, Jiangsu, China.
  • Zhou G; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, No. 1 Qianhu Houcun, Nanjing, 210014, Jiangsu, China.
  • Hang Y; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, No. 1 Qianhu Houcun, Nanjing, 210014, Jiangsu, China.
  • Sun X; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, No. 1 Qianhu Houcun, Nanjing, 210014, Jiangsu, China. xiaoqinsun@cnbg.net.
Planta ; 246(4): 763-778, 2017 Oct.
Article en En | MEDLINE | ID: mdl-28674753
MAIN CONCLUSION: The contribution of variations in coding regions or promoters to the changes in FAE1 expression levels have be quantified and compared in parallel by specifically designed swapping constructs. FATTY ACID ELONGATION1 (FAE1) is a key gene in control of erucic acid synthesis in plant seeds. The expression of FAE1 genes in Brassica oleracea and Capsella rubella, representatives of high and low erucic acid species, respectively, was characterized to provide insight into the regulation of very long-chain fatty-acid biosynthesis in seeds. Virtually, no methylation was detected either in B. oleracea or in C. rubella, suggesting that modification of promoter methylation might not be a predominant mechanism. Swapping constructs were specifically designed to quantify and compare the contribution of variations in coding regions or promoters to the changes in FAE1 expression levels in parallel. A significantly higher fold change in erucic acid content was observed when swapping coding regions rather than when swapping promoters, indicating that the coding region is a major determinant of the catalytic power of ß-ketoacyl-CoA synthase proteins. Common motifs have been proposed as essential for the preservation of basic gene expression patterns, such as seed-specific expression. However, the occurrence of variation in common cis-elements or the presence of species-specific cis-elements might be plausible mechanisms for changes in the expression levels in different organisms. In addition, conflicting observations in previous reports associated with FAE1 expression are discussed, and we suggest that caution should be taken when selecting a plant transformation vector and in interpreting the results obtained from vectors carrying the CaMV 35S promoter.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Acetiltransferasas / Brassica / Ácidos Erucicos / Regulación de la Expresión Génica de las Plantas / Capsella Idioma: En Revista: Planta Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Acetiltransferasas / Brassica / Ácidos Erucicos / Regulación de la Expresión Génica de las Plantas / Capsella Idioma: En Revista: Planta Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania