Combined Analysis of Volatile Compounds and Extraction of Floral Fragrance Genes in Two Dendrobium Species

Many species of the Dendrobium genus are traditional Chinese herbal medicine and ornamental plants. Flower fragrance is one most important horticultural characters plays a crucial role in ecology, economy, aesthetics However, volatile constituents key regulatory genes related to floral biosynthesis poorly understood. In this experiment, flowers from two with high-scent smells, moniliforme (L.) Sw. (D. moniliforme), light-scent nobile “H1” “H1”), were selected. The aim study was explore gene expression profiles by combining constituent determination transcriptome analysis different species. Physiological results showed that 60 compounds identified D. 52 ‘H1’ four flowering stages, full bloom stage complicated because there 41 33 compounds, respectively. These belong terpenes, aromatics, fatty acids, nitrogenous ketones, alcohols, alkanes, components gynandrium petals revealed probably sites affecting release volatiles. relative content terpene highest, 77.25% moniliforme) 50.38% Transcriptome differentially expressed (DEGs) highly enriched terpenoid backbone linalool synthetase (LIS) up-regulated smell This helpful flower provides theoretical basis for further understanding molecular functions synthesis release, as well cultivation new aromatic