Journal
PLANT MOLECULAR BIOLOGY REPORTER
Volume 29, Issue 4, Pages 769-783Publisher
SPRINGER
DOI: 10.1007/s11105-010-0284-z
Keywords
Glycine max; Genome; Fatty acid desaturase; Phylogenetic analysis
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Funding
- Modern Agro-industry Technology Research System [nycytx-19]
- National High-Tech Research and Development Plan of China [2006AA10A114, 2007AA10Z189]
- National Project of Scientific and Technical Supporting Program [2008BAD97B04]
- National Natural Science Foundation of China [31000728]
- Natural Science Fund of Shangdong Province [ZR2009DQ004]
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Fatty acid desaturases can introduce double bonds into the hydrocarbon chains of fatty acids to produce unsaturated fatty acids. In the present study, 29 full-length desaturase genes were identified from soybean genome by a thorough annotation exercise. A comprehensive analysis was performed to characterize phylogeny, chromosomal locations, structures, conserved motifs, and expression patterns of those genes. The soybean genes were phylogenetically clustered into nine subfamilies with the Arabidopsis counterparts, FAB2, FAD2, FAD3, FAD5, FAD6, FAD7, FAD8, SLD1, and DES1. Twenty-nine desaturase genes were found to be distributed on at least 15 of the 20 soybean chromosomes. The gene structures and motif compositions were considerably conserved among the subfamilies. The majority of desaturase genes showed specific temporal and spatial expression patterns across different tissues and developmental stages based on microarray data analyses. The study may provide new insights into the origin and evolution of fatty acid biosynthesis pathways in higher plants. Additionally, the characterization of desaturases from soybean will lead to the identification of additional genes for genetic modification of plants to produce nutritionally important fatty acids.
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