Publications by authors named "Teresa Harp"
We evaluated the variability of metabolites in various maize hybrids due to the effect of environment, genotype, phenotype as well as the interaction of the first two factors. We analyzed 480 forage and the same number of grain samples from 21 genetically diverse non-GM Pioneer brand maize hybrids, including some with drought tolerance and viral resistance phenotypes, grown at eight North American locations. As complementary platforms, both GC/MS and LC/MS were utilized to detect a wide diversity of metabolites.
View Article and Find Full Text PDFThis study was designed to elucidate the biological variation in expression of many metabolites due to environment, genotype, or both, and to investigate the potential utility of metabolomics to supplement compositional analysis for substantial equivalence assessments of genetically modified (GM) crops. A total of 654 grain and 695 forage samples from 50 genetically diverse non-GM DuPont Pioneer maize hybrids grown at six locations in the U.S.
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- Phytic acid (Ins P6) is the most common myo-inositol phosphate in plants, but how it’s made is not well understood, especially concerning myo-inositol's role in its production.
- A low-phytic acid mutant in maize, labeled lpa3, was found to have reduced phytic acid levels, increased myo-inositol, and minimal myo-inositol phosphate intermediates in its seeds, linked to a mutation in the myo-inositol kinase gene.
- The maize MIK protein, crucial for phytic acid biosynthesis in developing seeds, phosphorylates myo-inositol to create various monophosphates, suggesting multiple pathways to phytic acid exist and hinting at