Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Enhancing microRNA 167A expression in seed decreases the α-linolenic acid content and increases seed size in Camelina sativa

Journal Article · · The Plant Journal
DOI:https://doi.org/10.1111/tpj.14223· OSTI ID:1616082
 [1];  [2];  [3];  [4];  [1]
  1. Montana State Univ., Bozeman, MT (United States)
  2. Montana State Univ., Bozeman, MT (United States); Shanxi Agricultural Univ., Taigu (China)
  3. HudsonAlpha Inst. of Biotechnology, Huntsville, AL (United States)
  4. HudsonAlpha Inst. of Biotechnology, Huntsville, AL (United States); USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)

Despite well established roles of microRNAs in plant development, few aspects have been addressed to understand their effects in seeds especially on lipid metabolism. In this study, we showed that overexpressing microRNA167A (miR167OE) in camelina (Camelina sativa) under a seed-specific promoter changed fatty acid composition and increased seed size. Specifically, the miR167OE seeds had a lower α-linolenic acid with a concomitantly higher linoleic acid content than the wild-type. This decreased level of fatty acid desaturation corresponded to a decreased transcriptional expression of the camelina fatty acid desaturase3 (CsFAD3) in developing seeds. MiR167 targeted the transcription factor auxin response factor (CsARF8) in camelina, as had been reported previously in Arabidopsis. Chromatin immunoprecipitation experiments combined with transcriptome analysis indicated that CsARF8 bound to promoters of camelina bZIP67 and ABI3 genes. These transcription factors directly or through the ABI3-bZIP12 pathway regulate CsFAD3 expression and affect α-linolenic acid accumulation. In addition, to decipher the miR167A-CsARF8 mediated transcriptional cascade for CsFAD3 suppression, transcriptome analysis was conducted to implicate mechanisms that regulate seed size in camelina. Expression levels of many genes were altered in miR167OE, including orthologs that have previously been identified to affect seed size in other plants. Most notably, genes for seed coat development such as suberin and lignin biosynthesis were down-regulated. Finally, this study provides valuable insights into the regulatory mechanism of fatty acid metabolism and seed size determination, and suggests possible approaches to improve these important traits in camelina.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Montana State Univ., Bozeman, MT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF); USDA
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1616082
Alternate ID(s):
OSTI ID: 1612534
OSTI ID: 1647217
OSTI ID: 1494844
Journal Information:
The Plant Journal, Journal Name: The Plant Journal Journal Issue: 2 Vol. 98; ISSN 0960-7412
Publisher:
Society for Experimental BiologyCopyright Statement
Country of Publication:
United States
Language:
English

References (110)

Camelina-derived jet fuel and diesel: Sustainable advanced biofuels journal June 2010
The Bicinchoninic Acid (BCA) Assay for Protein Quantitation book January 2009
Generation of transgenic plants of a potential oilseed crop Camelina sativa by Agrobacterium-mediated transformation journal September 2007
Leafy cotyledon genes are essential for induction of somatic embryogenesis of Arabidopsis journal July 2005
A fatty acid condensing enzyme from Physaria fendleri increases hydroxy fatty acid accumulation in transgenic oilseeds of Camelina sativa journal July 2014
Hormonal regulation of tissue-specific ectopic expression of an Arabidopsis endoplasmic reticulum-type ω-3 fatty acid desaturase (FAD3) gene journal October 2001
Networks controlling seed size in Arabidopsis journal February 2015
Identification and molecular characterization of miRNAs and their target genes associated with seed development through small RNA sequencing in chickpea journal February 2021
Dual DNA Binding Property of ABA insensitive 3 Like Factors Targeted to Promoters Responsive to ABA and Auxin journal November 2005
Abscisic acid or high osmoticum promote accumulation of long-chain fatty acids in developing embryos of Brassica napus journal January 1989
Auxin-regulated changes of fatty acid content and composition in soybean zygotic embryo cotyledons journal March 1995
Regulation and evolution of the interaction of the seed B3 transcription factors with NF-Y subunits journal October 2017
New frontiers in oilseed biotechnology: meeting the global demand for vegetable oils for food, feed, biofuel, and industrial applications journal April 2011
The Transcription Factor FUSCA3 Controls Developmental Timing in Arabidopsis through the Hormones Gibberellin and Abscisic Acid journal September 2004
Biodiesel from Camelina sativa: A comprehensive characterisation journal March 2013
Characterization of the morphological changes and fatty acid profile of developing Camelina sativa seeds journal October 2013
Signaling pathways of seed size control in plants journal October 2016
Increasing seed mass and oil content in transgenic Arabidopsis by the overexpression of wri1-like gene from Brassica napus journal January 2010
Identification of three genes encoding microsomal oleate desaturases (FAD2) from the oilseed crop Camelina sativa journal February 2011
Mutagenesis of the FAE1 genes significantly changes fatty acid composition in seeds of Camelina sativa journal February 2018
Physiological and developmental regulation of seed oil production journal July 2010
TTG1 complex MYBs, MYB5 and TT2, control outer seed coat differentiation journal January 2009
“Designer” Biodiesel: Optimizing Fatty Ester Composition to Improve Fuel Properties journal March 2008
Overexpression of microRNA OsmiR397 improves rice yield by increasing grain size and promoting panicle branching journal July 2013
The plasma membrane–bound phospholipase Dδ enhances freezing tolerance in Arabidopsis thaliana journal March 2004
The emerging biofuel crop Camelina sativa retains a highly undifferentiated hexaploid genome structure journal April 2014
Fast and sensitive protein alignment using DIAMOND journal November 2014
microRNA regulation of fruit growth journal March 2015
Arabidopsis mesophyll protoplasts: a versatile cell system for transient gene expression analysis journal June 2007
An efficient chromatin immunoprecipitation (ChIP) protocol for studying histone modifications in Arabidopsis plants journal May 2008
Epigenetic mechanisms governing seed development in plants journal December 2006
Manipulation of Auxin Response Factor 19 affects seed size in the woody perennial Jatropha curcas journal January 2017
Flavonoids and the regulation of seed size in Arabidopsis journal March 2014
Module-specific regulation of the β-phaseolin promoter during embryogenesis journal February 2003
The FUS3 transcription factor functions through the epidermal regulator TTG1 during embryogenesis in Arabidopsis journal January 2004
Gene regulation during late embryogenesis: the RY motif of maturation-specific gene promoters is a direct target of the FUS3 gene product journal March 2000
Seed Development and Differentiation: A Role for Metabolic Regulation journal July 2004
Genes directly regulated by LEAFY COTYLEDON2 provide insight into the control of embryo maturation and somatic embryogenesis journal February 2006
Identification of acyltransferases required for cutin biosynthesis and production of cutin with suberin-like monomers journal November 2007
Arabidopsis LEAFY COTYLEDON2 induces maturation traits and auxin activity: Implications for somatic embryogenesis journal February 2008
An enzyme regulating triacylglycerol composition is encoded by the ROD1 gene of Arabidopsis journal October 2009
Auxin controls seed dormancy through stimulation of abscisic acid signaling by inducing ARF-mediated ABI3 activation in Arabidopsis journal August 2013
Integration of epigenetic and genetic controls of seed size by cytokinin in Arabidopsis journal September 2013
Natural variation in ARF18 gene simultaneously affects seed weight and silique length in polyploid rapeseed journal August 2015
Activation and repression of transcription by auxin-response factors journal May 1999
Natural allelic variation at seed size loci in relation to other life history traits of Arabidopsis thaliana journal April 1999
edgeR: a Bioconductor package for differential expression analysis of digital gene expression data journal November 2009
Down-regulation of AUXIN RESPONSE FACTORS 6 and 8 by microRNA 167 leads to floral development defects and female sterility in tomato journal April 2014
The Arabidopsis Information Resource (TAIR): improved gene annotation and new tools journal December 2011
MicroRNAs prevent precocious gene expression and enable pattern formation during plant embryogenesis journal December 2010
The turnip Mutant of Arabidopsis Reveals That LEAFY COTYLEDON1 Expression Mediates the Effects of Auxin and Sugars to Promote Embryonic Cell Identity journal August 2006
CYP86B1 Is Required for Very Long Chain ω -Hydroxyacid and α , ω -Dicarboxylic Acid Synthesis in Root and Seed Suberin Polyester journal June 2009
The Protein Kinase SnRK2.6 Mediates the Regulation of Sucrose Metabolism and Plant Growth in Arabidopsis journal March 2010
Expression of ZmLEC1 and ZmWRI1 Increases Seed Oil Production in Maize journal May 2010
Three Arabidopsis Fatty Acyl-Coenzyme A Reductases, FAR1, FAR4, and FAR5, Generate Primary Fatty Alcohols Associated with Suberin Deposition journal June 2010
MicroRNAs Regulate the Timing of Embryo Maturation in Arabidopsis journal February 2011
Acyl Editing and Headgroup Exchange Are the Major Mechanisms That Direct Polyunsaturated Fatty Acid Flux into Triacylglycerols journal August 2012
Identification of Direct Targets of FUSCA3, a Key Regulator of Arabidopsis Seed Development journal January 2013
Brassinosteroid Regulates Seed Size and Shape in Arabidopsis journal June 2013
Overexpression of the FAD3 Desaturase Gene in a Mutant of Arabidopsis journal August 1997
The Nonspecific Lipid Transfer Protein AtLtpI-4 Is Involved in Suberin Formation of Arabidopsis thaliana Crown Galls journal September 2016
Two Acyltransferases Contribute Differently to Linolenic Acid Levels in Seed Oil journal February 2017
Three Classes of Abscisic Acid (ABA)-Insensitive Mutations of Arabidopsis Define Genes that Control Overlapping Subsets of ABA Responses journal November 1990
A New Dynamin-Like Protein, ADL6, Is Involved in Trafficking from the trans -Golgi Network to the Central Vacuole in Arabidopsis journal July 2001
The Acyl-CoA Synthetase Encoded by LACS2 Is Essential for Normal Cuticle Development in Arabidopsis journal February 2004
AUXIN RESPONSE FACTOR8 Is a Negative Regulator of Fruit Initiation in Arabidopsis journal July 2006
The Acyltransferase GPAT5 Is Required for the Synthesis of Suberin in Seed Coat and Root of Arabidopsis journal January 2007
MYB58 and MYB63 Are Transcriptional Activators of the Lignin Biosynthetic Pathway during Secondary Cell Wall Formation in Arabidopsis journal January 2009
ABI3 and PIL5 Collaboratively Activate the Expression of SOMNUS by Directly Binding to Its Promoter in Imbibed Arabidopsis Seeds journal April 2011
bZIP67 Regulates the Omega-3 Fatty Acid Content of Arabidopsis Seed Oil by Activating FATTY ACID DESATURASE3 journal August 2013
MYB118 Represses Endosperm Maturation in Seeds of Arabidopsis journal September 2014
MYB107 and MYB9 Homologs Regulate Suberin Deposition in Angiosperms journal September 2016
Leafy Cotyledon Mutants of Arabidopsis. journal August 1994
A mutant of Arabidopsis which is defective in seed development and storage protein accumulation is a new abi3 allele journal July 1992
WRINKLED1 encodes an AP2/EREB domain protein involved in the control of storage compound biosynthesis in Arabidopsis journal September 2004
A high-throughput screen for genes from castor that boost hydroxy fatty acid accumulation in seed oils of transgenic Arabidopsis journal March 2006
Differential regulation of closely related R2R3-MYB transcription factors controls flavonol accumulation in different parts of the Arabidopsis thaliana seedling: TFs of A. thaliana R2R3-MYB subgroup 7 journal April 2007
WRINKLED1 specifies the regulatory action of LEAFY COTYLEDON2 towards fatty acid metabolism during seed maturation in Arabidopsis: Oil synthesis regulatory network in seeds journal April 2007
Deposition and localization of lipid polyester in developing seeds of Brassica napus and Arabidopsis thaliana: Lipid polyesters in seed coats journal October 2007
Deciphering gene regulatory networks that control seed development and maturation in Arabidopsis journal May 2008
Two Arabidopsis 3-ketoacyl CoA synthase genes, KCS20 and KCS2 / DAISY , are functionally redundant in cuticular wax and root suberin biosynthesis, but differentially controlled by osmotic stress journal November 2009
Lipid biochemists salute the genome journal March 2010
Two high linolenic mutants of Arabidopsis thaliana contain megabase-scale genome duplications encompassing the FAD3 locus: High linolenic acid mutants of A. thaliana journal October 2011
Increasing seed oil content in oil-seed rape (Brassica napus L.) by over-expression of a yeast glycerol-3-phosphate dehydrogenase under the control of a seed-specific promoter journal May 2007
MYB 56 Encoding a R2R3 MYB Transcription Factor Regulates Seed Size in Arabidopsis thaliana : MYB56 and Seed Size journal September 2013
Complexity and robustness of the flavonoid transcriptional regulatory network revealed by comprehensive analyses of MYB-bHLH-WDR complexes and their targets in Arabidopsis seed journal December 2013
The transcription factor MYB115 contributes to the regulation of proanthocyanidin biosynthesis and enhances fungal resistance in poplar journal April 2017
Camelina seed transcriptome: a tool for meal and oil improvement and translational research journal April 2013
Extension of oil biosynthesis during the mid-phase of seed development enhances oil content in Arabidopsis seeds journal October 2015
Significant enhancement of fatty acid composition in seeds of the allohexaploid, Camelina sativa , using CRISPR/Cas9 gene editing journal January 2017
Selective gene dosage by CRISPR-Cas9 genome editing in hexaploid Camelina sativa journal April 2017
FUSCA3 activates triacylglycerol accumulation in Arabidopsis seedlings and tobacco BY2 cells journal August 2016
Histone acetyltransferase general control non-repressed protein 5 (GCN5) affects the fatty acid composition of Arabidopsis thaliana seeds by acetylating fatty acid desaturase3 ( FAD3 ) journal September 2016
Map-based cloning of a gene controlling omega-3 fatty acid desaturation in Arabidopsis journal November 1992
Seed-Development Programs: A Systems Biology–Based Comparison Between Dicots and Monocots journal April 2013
Protocol: a highly sensitive RT-PCR method for detection and quantification of microRNAs journal January 2007
Datura genome reveals duplications of psychoactive alkaloid biosynthetic genes and high mutation rate following tissue culture journal March 2021
Moderated estimation of fold change and dispersion for RNA-seq data with DESeq2 journal December 2014
A transgene design for enhancing oil content in Arabidopsis and Camelina seeds journal February 2018
Polinton-like viruses are abundant in aquatic ecosystems journal January 2021
Acyl-Lipid Metabolism journal January 2013
The AUXIN RESPONSE FACTOR 2 gene of Arabidopsis links auxin signalling, cell division, and the size of seeds and other organs journal December 2005
Arabidopsis microRNA167 controls patterns of ARF6 and ARF8 expression, and regulates both female and male reproduction journal October 2006
A Regulatory Network for Coordinated Flower Maturation journal February 2012
Identification of MicroRNAs and Transcript Targets in Camelina sativa by Deep Sequencing and Computational Methods journal March 2015
Down-regulation of AUXIN RESPONSE FACTORS 6 and 8 by microRNA 167 leads to floral development defects and female sterility in tomato text January 2014
Arabidopsis microRNA167 controls patterns of ARF6 and ARF8 expression, and regulates both female and male reproduction text January 2006
A Regulatory Network for Coordinated Flower Maturation text January 2012
Leafy Cotyledon Mutants of Arabidopsis journal August 1994
A New Dynamin-Like Protein, ADL6, Is Involved in Trafficking from the trans-Golgi Network to the Central Vacuole in Arabidopsis journal July 2001

Cited By (21)

Into the Seed: Auxin Controls Seed Development and Grain Yield journal February 2020
Additional file 10 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress image January 2020
Additional file 11 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 1 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 2 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 3 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 4 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 5 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 6 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 7 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress dataset January 2020
Additional file 8 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress image January 2020
Additional file 9 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress image January 2020
Additional file 10 of Small RNA profiling for identification of microRNAs involved in regulation of seed development and lipid biosynthesis in yellowhorn dataset January 2021
Additional file 3 of Small RNA profiling for identification of microRNAs involved in regulation of seed development and lipid biosynthesis in yellowhorn dataset January 2021
Additional file 5 of Small RNA profiling for identification of microRNAs involved in regulation of seed development and lipid biosynthesis in yellowhorn dataset January 2021
Additional file 6 of Small RNA profiling for identification of microRNAs involved in regulation of seed development and lipid biosynthesis in yellowhorn dataset January 2021
Additional file 7 of Small RNA profiling for identification of microRNAs involved in regulation of seed development and lipid biosynthesis in yellowhorn dataset January 2021
Additional file 8 of Small RNA profiling for identification of microRNAs involved in regulation of seed development and lipid biosynthesis in yellowhorn dataset January 2021
Additional file 2 of Multiomics comparative analysis of the maize large grain mutant tc19 identified pathways related to kernel development dataset January 2023
Additional file 3 of Multiomics comparative analysis of the maize large grain mutant tc19 identified pathways related to kernel development dataset January 2023
Mapping quantitative trait loci for seed traits in Camelina sativa journal June 2019

Figures / Tables (7)