Volatile organic compound emissions from different stages of Cananga odorata flower development.
Volatile organic compound emissions from different stages of Cananga odorata flower development.
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DOI：
10.3390/molecules19078965
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发表时间：
2014-06-27
期刊：
影响因子：
--
通讯作者：
Hu RS
中科院分区：
文献类型：
--
作者：
Qin XW;Hao CY;He SZ;Wu G;Tan LH;Xu F;Hu RS
采用顶空-固相微萃取-气相色谱-质谱联用技术（HS-SPME-GC-MS）对加南加不同花期挥发性有机物（VOCs）进行鉴定，评价花的挥发性多态性，为确定最佳采收期提供依据。电子鼻实验结果结合判别因子分析表明，在花蕾期、显花瓣期、初花期、盛花期、终花期、萎花期和干花期，香果散发出的气味是不同的。前两个判别因子解释了97.52%的总系统方差。在花期共检测到92种化合物，不同花期间的平均Bray-Curtis相似值为52.45%。在花发育过程中观察到高水平的挥发性多态性。挥发性有机化合物主要为烃类、酯类、醇类、醛类、酚类、酸类、酮类和醚类，主要化合物为β-石竹烯（15.05% ~ 33.30%）。其他鉴定的化合物有β-立方苯、d-germacrene、苯甲酸苄酯和α-立方苯。此外，在花发育中期检测到大量的挥发性有机化合物，在花期检测到更多的烃类、酯类和醇类化合物。盛花期可能是采花的最佳时期。
Headspace-solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) was used to identify the volatile organic compounds (VOCs) of the different flower development stages of Cananga odorata for the evaluation of floral volatile polymorphism as a basis to determine the best time of harvest. Electronic nose results, coupled with discriminant factor analysis, suggested that emitted odors varied in different C. odorata flower development stages, including the bud, display-petal, initial-flowering, full-flowering, end-flowering, wilted-flower, and dried flower stages. The first two discriminant factors explained 97.52% of total system variance. Ninety-two compounds were detected over the flower life, and the mean Bray–Curtis similarity value was 52.45% among different flower development stages. A high level of volatile polymorphism was observed during flower development. The VOCs were largely grouped as hydrocarbons, esters, alcohols, aldehydes, phenols, acids, ketones, and ethers, and the main compound was β-caryophyllene (15.05%–33.30%). Other identified compounds were β-cubebene, d-germacrene, benzyl benzoate, and α-cubebene. Moreover, large numbers of VOCs were detected at intermediate times of flower development, and more hydrocarbons, esters, and alcohols were identified in the full-flowering stage. The full-flowering stage may be the most suitable period for C. odorata flower harvest.
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