Publications by authors named "Joel Talbotec"
Glutamine synthetase and asparagine synthetase are two master enzymes involved in ammonium assimilation in plants. Their roles in nitrogen remobilization and nitrogen use efficiency have been proposed. In this report, the genes coding for the cytosolic glutamine synthetases (HvGS1) and asparagine synthetases (HvASN) in barley were identified.
View Article and Find Full Text PDFImproving plant nitrogen (N) use efficiency or controlling soil N requires a better knowledge of the regulation of plant N metabolism. This could be achieved using Arabidopsis as a model genetic system, taking advantage of the natural variation available among ecotypes. Here, we describe an extensive study of N metabolism variation in the Bay-0 x Shahdara recombinant inbred line population, using quantitative trait locus (QTL) mapping.
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- Pectins are complex polysaccharides found in cell walls, making their biosynthesis and functionality challenging to study due to the lack of specific mutants.
- Two allelic mutants, quasimodo1 (qua1-1 and qua1-2), exhibit stunted growth and reduced cell adhesion, with a significant decrease in galacturonic acid levels (a key component of pectin) compared to the wild type.
- Both mutants have a T-DNA insertion in the QUAS1 gene, which encodes a glycosyltransferase, suggesting that this protein plays a crucial role in pectin synthesis and that similar genes in Arabidopsis might be important for pectin biosynthesis and cell adhesion.