茶梅品种资源的收集保存、鉴定评价及种质创新

ttttt目的ttttt明确茶梅品种冬星主要挥发性成分及其变化特征，为茶梅资源进一步开发利用提供一定依据。ttttttttttttt方法ttttt采用固相微萃取和气相色谱—质谱联用技术，分析茶梅冬星花朵不同花期、不同花器官挥发性成分及其相对含量变化。ttttttttttttt结果ttttt苯乙酮、顺式-芳樟醇氧化物和芳樟醇是冬星开花进程中相对含量较高的挥发性成分，其中苯乙酮相对含量随花朵开放逐渐升高，顺式-芳樟醇氧化物和芳樟醇的相对含量先升高后降低；花朵开放过程中，醛酮类、烯类和脂类的相对含量逐渐升高，酚类、烷烃类和芳香烃类的相对含量逐渐降低，醇类的相对含量先升高后降低。冬星花瓣挥发性成分主要为酚类，其次为醛酮类、烯类和烷烃类，主要成分为2,6-二(1,1-二甲基乙基)-4-(1-甲基丙基)苯酚；雄蕊挥发性成分主要为醇类和醛酮类，主要成分为顺式-芳樟醇氧化物、6-乙烯基二氢-2,2,6-三甲基-2H-吡喃-3-(4H)酮和苯乙酮；雌蕊挥发性成分主要为醇类，其次为醛酮类、烷烃类和酚类，主要成分为顺式-芳樟醇氧化物、苯乙酮和芳樟醇。ttttttttttttt结论ttttt冬星的主要挥发性成分是苯乙酮、顺式-芳樟醇氧化物和芳樟醇，挥发性成分释放的主要花器官是花瓣或雄蕊。tttt

Medicinal flowers. XXXI. acylated oleanane-type triterpene saponins,sasanquasaponins I-V,with antiallergic activity from the flower buds of Camellia sasanqua

tttttPurposetttttThe aim was to determine the main volatile components and their changes of ‘Dongxing’ of Camellia sasanqua cultivar, to provide a basis for the further development of C. sasanqua.ttttttttttttttttttMethodtttttThe volatile components and their relative content emitting in different florescence and flower parts of C. sasanqua ‘Dongxing’ were studied by solid phase micro-extraction and gas chromatography-mass spectrometry (GC-MS).ttttttttttttttttttResultstttttAcetophenone, cis-linaloloxide and linalool are the main volatile components, and the relative content of acetophenone increased gradually during the flowering, the relative contents of cis-linaloloxide and linalool increased firstly and then decreased. With the flower blooming and senescence, the relative contents of aromatic hydrocarbon, phenols and alkanes components decreased gradually, but the relative content of alkene, aldehydes and ketones components increased. The relative content of alcohol components increased firstly and then decreased. Totally 40 components were identified in petals of ‘Dongxing’, 27 in stamens and 18 in pistils. Stamens were the main flower parts of volatile components releasing. The main volatile component types of petals included alkenes, phenols, aldehydes and ketones components, and those of stamens included aldehydes and ketones, then alcohols. The component types of pistils were aldehydes and ketones, alcohols, then phenols and alkanes.ttttttttttttttttttConclusiontttttAcetophenone, cis-linaloloxide and linalool are the main volatile components, petals or stamens were the main flower parts of volatile components release.ttttttttt