四种广西特有秋海棠花朵挥发性成分分析OA

The Guangxi endemic plants Begonia lanternaria,B.longgangensis,B.luzhaiensis,and B.pseudoleprosa have important ecological value and ornamental potential.This study aims to clarify the composition,content and interspecific differences of volatile components in their flowers.In this study,headspace solid-phase microextraction combined with gas chromatography-mass spectrometry was used to identify and analyze the volatile components of flowers of four Begonia species.The results were as follows:(1)A total of 56 volatile compounds were detected,including 20 terpenes,16 other hydrocarbons(excluding terpenes),8 alcohols,1 phenol,6 esters,1 amide,and 4 other compounds.Among them,Terpenoids were the most abundant volatile components in flower samples of B.longgangensis,B.luzhaiensis and B.pseudoleprosa,whereas alcohols were the most abundant in flower samples of B.lanternaria.(2)The number of volatile components showed significant differences among species.The richness of volatile components ranked from high to low was B.longgangensis(27 kinds),B.pseudoleprosa(22 kinds),B.luzhaiensis(10 kinds),and B.lanternaria(5 kinds).No common volatile components were found among the four species.(3)(Z)-β-ocimene was significantly enriched in flowers of B.longgangensis and B.luzhaiensis,and might be a major contributor to their characteristic aroma.In summary,the volatile components of flowers of four Begonia species differ in composition and relative content,resulting in unique aroma profiles.These results provide references for the evaluation of germplasm resources,variety breeding,horticultural development,and health tourism related to Begonia plants.