AUTHOR=Cheng Xi , Feng Yan , Chen Dongliang , Luo Chang , Yu Xiaofang , Huang Conglin 

TITLE=Evaluation of Rosa germplasm resources and analysis of floral fragrance components in R. rugosa

JOURNAL=Frontiers in Plant Science

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.1026763

DOI=10.3389/fpls.2022.1026763

ISSN=1664-462X

ABSTRACT=<p><italic>Rosa rugosa</italic> (Rosaceae) is an important functional plant used in food products, tea, and aromatherapy. Characteristics of <italic>R. rugosa</italic> varieties based on the biological traits and floral fragrant components were studied by applying an analytic hierarchy process, headspace solid-phase microextraction gas chromatography–mass spectrometry, and metabolomic analysis. The 77 <italic>Rosa</italic> accessions (comprising 27 <italic>R. rugosa</italic> varieties, 43 scented <italic>R. hybrida</italic> cultivars, and seven fragrant <italic>R.</italic> species) were grouped into nine classes based on 17 morphological characters and 16 targeted fragrant substances by cluster analysis. Three <italic>R. rugosa</italic> cultivars differing in fragrance type were selected for volatile metabolomics analysis at four stages of flower development. In total, 156 differential volatile organic compounds (VOC) were detected and the VOC content patterns were further investigated in two important metabolic pathways (the monoterpenoid biosynthetic pathway, and the phenylalanine, tyrosine, and tryptophan biosynthesis pathway). The results provide a foundation for efficient use of <italic>Rosa</italic> germplasm and insights into the utilization of <italic>R. rugosa</italic> as a functional flower.</p>