Abstract
Chen, H., Seguin, P., Jabaji, S. and Liu, W. 2011. Spatial distribution of isoflavones and isoflavone-related gene expression in high and low isoflavone soybean cultivars. Can. J. Plant Sci. 91: 697-705. Soybean contains high concentrations of isoflavones that have putative health-beneficial effects. A study was conducted to document the spatial distribution of isoflavones and the expression of 14 key genes and gene homologs encoding enzymes involved in isoflavone synthesis using quantitative reverse transcription (QRT)-PCR. Genes studied included phenylalanine ammonia lyase (PAL), chalcone synthase (CHS), chalcone isomerase (CHI), chalcone reductase (CHR), and isoflavone synthase (IFS). Two cultivars were used, AC Proteina and AC Orford, high- and low-isoflavone cultivars, respectively. Plants were harvested at the seed filling stage (R5) and were separated into leaf, stem, root, flower, pod, and seed parts. The present study revealed that at the R5 stage the expression of 14 key genes and gene homologs ...
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