Integrated Metabolomic and Transcriptomic Analysis Reveals Bioactive Compound Diversity in Organs of Saffron Flower

Area of Science:

• Plant metabolomics and transcriptomics
• Phytochemistry of Crocus sativus L.

Background:

• Saffron stigma is traditionally valued, but other floral parts are chemically underexplored.
• Limited knowledge exists on the molecular diversity and therapeutic potential of non-stigma saffron components.

Purpose of the Study:

• To conduct a comprehensive metabolomic analysis of saffron floral organs.
• To integrate metabolomic data with transcriptomic data for a holistic understanding.
• To identify bioactive compounds and their biosynthetic pathways in different saffron parts.

Main Methods:

• Utilized Gas Chromatography-Mass Spectrometry (GC-MS) and Ultra-Performance Liquid Chromatography-Tandem Mass Spectrometry (UPLC-MS/MS) for metabolite profiling.
• Employed Principal Component Analysis (PCA) and Partial Least Squares Discriminant Analysis (PLS-DA) for data interpretation.
• Integrated metabolomic data with existing transcriptomic data.

Main Results:

• Identified 248 diverse metabolites across saffron floral organs, including amino acids, flavonoids, and secondary metabolites.
• Revealed distinct metabolomic signatures for each organ (stamen, leaf, tepal, stigma, corm).
• Discovered bioactive compounds like crocin, safranal, quercetin, and prenylnaringenin, with potential therapeutic applications.

Conclusions:

• This study provides a comprehensive molecular and metabolic landscape of saffron floral organs.
• It enhances understanding of the biosynthesis of key compound classes (apocarotenoids, cannabinoids, flavonoids).
• Offers valuable insights for future research into saffron's therapeutic potential and agricultural applications.