Jasmonate signaling and regulation of anthocyanin biosynthesis in fruits: searching for key targets of MYC2 in strawberry

Fecha de publicación: 10/06/2022
Fuente: ISHS (International Society for Horticultural Science)
Post date: Friday 10 June 2022
Author:
ISHS Secretariat

Paz E. Zuñiga is a candidate for Dr.Sc. in Plant Biology and Biotechnology in the Laboratory of Plant Molecular Physiology (LFMV) of the Institute of Biological Sciences at the University of Talca, Chile, under the supervision of Prof. Dr. Carlos R. Figueroa. They are currently interested in studying the transcriptional regulation of anthocyanin biosynthesis on strawberry (Fragaria × ananassa) fruit. Strawberries are a great source of flavonoids, such as anthocyanins, which can protect plants against stress due to their antioxidant properties. However, little is known about upstream regulatory genes controlling anthocyanin biosynthesis. Paz’s research focused on the role of MYC2, a core transcription factor (TF) of most aspects of the jasmonate (JA) signaling pathway in plants, in the biosynthesis regulation of anthocyanins in strawberries. In this study, the strawberry MYC2 gene was cloned and overexpressed on degreening strawberry fruit through Agrobacterium-mediated transformation. This experiment aimed to evaluate the effect of MYC2 overexpression on anthocyanin content and its impact on the transcription of essential genes for anthocyanin biosynthesis in strawberries. She found that transformed fruit showed a higher anthocyanin content and an increase in redness after eight days. Also, genes related to JA signaling and biosynthesis of abscisic acid (ABA) and anthocyanins were upregulated. Among these genes, some new targets of MYC2 related to ABA biosynthesis were found. The new findings of this study suggest that MYC2 could be a relevant upstream positive regulator for anthocyanin biosynthesis in strawberry fruit. This work was possible thanks to the invaluable support of my laboratory colleagues. It is an honor to be awarded for this work.
Paz E. Zuñiga won the ISHS Young Minds Award for the best poster presentation at the XIV International Symposium on Plant Bioregulators in Fruit Production, which was held virtually in Italy in February 2022. Her work is financed through the National Research and Development Agency (ANID, Chile) – Doctoral Scholarship/2020-1201520, FONDECYT/Regular 1210941, and Millennium Science Initiative Program - NCN2021_010.
Paz E. Zuñiga, Laboratory of Plant Molecular Physiology (LFMV), Institute of Biological Sciences, University of Talca, Campus Talca, Talca 3465548, Chile, e-mail: paz.zuniga@utalca.cl, paz.e.zuniga@gmail.com
The article is available in Chronica Horticulturae
Tags: plant bioregulators in fruit productionCategories: Young Minds Award Winners