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Title: Genome-wide analysis of the omega-3 fatty acid desaturase gene family in Gossypium

Journal Article · · BMC Plant Biology
 [1];  [2];  [3];  [1];  [1];  [4];  [4];  [5];  [6];  [4];  [3];  [1]
  1. US Arid-Land Agricultural Research Center, Maricopa, AZ (United States)
  2. US Arid-Land Agricultural Research Center, Maricopa, AZ (United States); Univ. of North Texas, Denton, TX (United States)
  3. Cornell Univ., Ithaca, NY (United States)
  4. Brigham Young Univ., Provo, UT (United States)
  5. West Virginia Univ., Morgantown, WV (United States)
  6. Univ. of North Texas, Denton, TX (United States)

The majority of commercial cotton varieties planted worldwide are derived from Gossypium hirsutum, which is a naturally occurring allotetraploid produced by interspecific hybridization of A- and D-genome diploid progenitor species. While most cotton species are adapted to warm, semi-arid tropical and subtropical regions, and thus perform well in these geographical areas, cotton seedlings are sensitive to cold temperature, which can significantly reduce crop yields. One of the common biochemical responses of plants to cold temperatures is an increase in omega-3 fatty acids, which protects cellular function by maintaining membrane integrity. The purpose of our study was to identify and characterize the omega-3 fatty acid desaturase (FAD) gene family in G. hirsutum, with an emphasis on identifying omega-3 FADs involved in cold temperature adaptation. Results: Eleven omega-3 FAD genes were identified in G. hirsutum, and characterization of the gene family in extant A and D diploid species (G. herbaceum and G. raimondii, respectively) allowed for unambiguous genome assignment of all homoeologs in tetraploid G. hirsutum. The omega-3 FAD family of cotton includes five distinct genes, two of which encode endoplasmic reticulum-type enzymes (FAD3-1 and FAD3-2) and three that encode chloroplast-type enzymes (FAD7/8-1, FAD7/8-2, and FAD7/8-3). The FAD3-2 gene was duplicated in the A genome progenitor species after the evolutionary split from the D progenitor, but before the interspecific hybridization event that gave rise to modern tetraploid cotton. RNA-seq analysis revealed conserved, gene-specific expression patterns in various organs and cell types and semi-quantitative RT-PCR further revealed that FAD7/8-1 was specifically induced during cold temperature treatment of G. hirsutum seedlings. Conclusions: The omega-3 FAD gene family in cotton was characterized at the genome-wide level in three species, showing relatively ancient establishment of the gene family prior to the split of A and D diploid progenitor species. The FAD genes are differentially expressed in various organs and cell types, including fiber, and expression of the FAD7/8-1 gene was induced by cold temperature. These data define the genetic and functional genomic properties of this important gene family in cotton and provide a foundation for future efforts to improve cotton abiotic stress tolerance through molecular breeding approaches.

Research Organization:
Univ. of North Texas, Denton, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0000797
OSTI ID:
1221918
Journal Information:
BMC Plant Biology, Vol. 14, Issue 1; ISSN 1471-2229
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Omega-3 fatty acid desaturase gene family from two ω-3 sources, Salvia hispanica and Perilla frutescens: Cloning, characterization and expression journal January 2018
Comparative identification and evolutionary relationship of fatty acid desaturase ( FAD ) genes in some oil crops: the sunflower model for evaluation of gene expression pattern under drought stress journal May 2018
Mining and identification of polyunsaturated fatty acid synthesis genes active during camelina seed development using 454 pyrosequencing journal June 2015
Reef-Specific Patterns of Gene Expression Plasticity in Eastern Oysters ( Crassostrea virginica ) journal August 2015
Genome-Scale Transcriptome Analysis of the Desert Shrub Artemisia sphaerocephala journal April 2016
The Family of Peanut Fatty Acid Desaturase Genes and a Functional Analysis of Four ω-3 AhFAD3 Members journal January 2020
Comparative Transcriptome Analysis Reveals an Efficient Mechanism of α-Linolenic Acid in Tree Peony Seeds journal December 2018
Cloning, Characterization, and Expression Analysis of Three FAD8 Genes Encoding a Fatty Acid Desaturase from Seeds of Paeonia ostii journal April 2018
Research Progress in Membrane Lipid Metabolism and Molecular Mechanism in Peanut Cold Tolerance journal June 2019
Genome-wide identification of membrane-bound fatty acid desaturase genes in Gossypium hirsutum and their expressions during abiotic stress journal April 2017
Characterization of 19 Genes Encoding Membrane-Bound Fatty Acid Desaturases and their Expression Profiles in Gossypium raimondii Under Low Temperature journal April 2015
Transcriptome analysis and identification of genes associated with ω-3 fatty acid biosynthesis in Perilla frutescens (L.) var. frutescens journal June 2016