Pontificia Universidad Catolica de ValparaÃso, Chile
Nathalie Kuhn is PhD in Molecular Genetics and Microbiology program of the Pontificia Universidad Católica de Chile. She has her expertise on crop science and she is currently Associate Professor in the Agronomy School of Pontificia Universidad Católica de Valparaíso. From a molecular perspective she explores physiological processes using fruit tree models like grapevine and sweet cherry. She is passionate for understanding the explanation of plant responses. She also aims to integrate plant science discoveries with applied crops science, to make a contribution in this area
Gibberellins (GAs) are extensively used in agriculture. GA3 treatment is known to affect fruit ripening in non-climacteric fruit crops, causing a delay in fruit color development and anthocyanin accumulation. It additionally increases fruit size and firmness and may affect sugar and acidity. However, there is few information about the molecular interactions of exogenously applied GA3 reported in non-climacteric fruits, such as sweet cherry. In sweet cherry fruits GA4 and GA3 accumulate prior to ripening initiation, but then they reduce their content as the fruit colors. GA4 is negatively correlated with anthocyanin and sugar content.
Here we found that anthocyanin content and several ripening related parameters were affected by GA3 when applied prior to ripening initiation in sweet cherry fruits. Differential transcriptomic profile was found between GA3- and control-treated fruits. Auxin response, photosynthesis and cell division GO categories were found to be overrepresented. The results suggest that GAs negatively affect ripening possibly by controlling pathways related to the ripening process, but on the other hand, there is a fruit sizing effect, that possibly depends on the activation of cell proliferation.
- Plant Genome Science
- Agricultural Science
- Molecular Plant Breeding
- Stress Signalling in Plants
- Plant Proteomics and Plant Science
- Plant Morphology and Plant Metabolism
- Crop Improvement and Plant Virology
- Plant Nutritional Genomics
- Plant Biotechnology
- Medicinal and Aromatic Plant Sciences
- Plants and Climate Change- Overcoming Measures