中国农业科学 ›› 2026, Vol. 59 ›› Issue (10): 2229-2248.doi: 10.3864/j.issn.0578-1752.2026.10.012

• 园艺 • 上一篇    下一篇

观赏海棠花朵中的挥发性物质组成及关键香气成分分析

雷萌1(), 李佳浍1, 刘伟超2, 张腾旬1()   

  1. 1 西北农林科技大学风景园林艺术学院, 陕西杨凌 712100
    2 河南农业大学风景园林与艺术学院, 郑州 450000
  • 收稿日期:2025-12-08 接受日期:2026-03-08 出版日期:2026-05-20 发布日期:2026-05-20
  • 通信作者:
    张腾旬,E-mail:
  • 联系方式: 雷萌,E-mail:leimeng_2023@163.com。
  • 基金资助:
    国家自然科学基金青年项目(32301659); 陕西省自然基金(2023-JC-QN-0188)

Identification of Volatile Compounds and Key Aroma Components in Ornamental Crabapple Flowers

LEI Meng1(), LI JiaHui1, LIU WeiChao2, ZHANG TengXun1()   

  1. 1 College of Landscape Architecture and Art, Northwest A & F University, Yangling 712100, Shannxi
    2 College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450000
  • Received:2025-12-08 Accepted:2026-03-08 Published:2026-05-20 Online:2026-05-20

摘要:

【目的】花香是观赏植物的重要性状,解析不同观赏海棠花香差异的物质基础,为观赏海棠香气育种及芳香产品开发提供依据。【方法】以6种园林中常见的观赏海棠盛花期花朵为材料,即湖北海棠(Malus hupehensis)、西府海棠(Malus micromalus)、‘草莓果冻’(Malus Strawberry Parfait)、‘凯尔斯’(Malus Kelsey)、‘绚丽’(Malus Radiant)和‘王族’(Malus Royalty),采用顶空-固相微萃取(headspace-solid-phase microextraction,HS-SPME)结合全二维气相色谱-飞行时间质谱(comprehensive two-dimensional gas chromatography-time of flight mass spectrometry,GC×GC-TOF MS)技术,分析其挥发性成分的组成与含量;结合香气活度值(odor activity value,OAV)和相对香气活度值(relative odor activity value,ROAV),利用正交偏最小二乘判别分析(orthogonal partial least squares-discriminant analysis,OPLS-DA)确定不同观赏海棠的关键香气成分;进一步通过层次聚类分析(hierarchical clustering analysis,HCA)不同观赏海棠香气特征的相似性与差异性。【结果】共鉴定出154种挥发性化合物,包括36种萜类及其衍生物、50种苯环/苯丙素类化合物、65种脂肪酸衍生物和3种氨基酸衍生物。各供试观赏海棠间的香气组成及含量具有显著差异,单种观赏海棠检出53—95种,总含量范围为7.95—38.31 μg·g-1,其中,‘绚丽’所含挥发性物质种类最多,‘草莓果冻’所含挥发性物质总含量最高,西府海棠所含挥发性物质种类和含量均最低。OPLS-DA模型拟合效果良好(R2X=0.972、R2Y=0.991、Q2=0.974),可有效区分不同观赏海棠的挥发性成分,且27种挥发性成分在区分其香气特征中具有重要贡献,主要包括芳樟醇、吲哚、肉桂醇、2,4-己二烯醛等。芳樟醇是‘草莓果冻’、湖北海棠、‘凯尔斯’和‘王族’海棠的关键香气成分,吲哚是‘绚丽’和西府海棠的关键香气物质,且西府海棠中的苯乙醛也发挥了重要的香气贡献作用,这些物质形成了各个观赏海棠的独特香气特征。【结论】鉴定出154种挥发性化合物,检测效果显著高于前人使用的常规HS-SPME-GC-MS技术,阐明了不同观赏海棠间香气组成和含量的显著差异、特征香气成分和花香差异的物质基础,明确了芳樟醇、吲哚、肉桂醇等关键香气成分,证实了不同观赏海棠的独特花香并非由单一物质主导决定的,而是由关键香气化合物的协同调控所形成的。

关键词: 海棠, 花香, 顶空-固相微萃取-全二维气相色谱-飞行时间质谱技术, 芳樟醇, 吲哚

Abstract:

【Objective】Floral fragrance is an important trait of ornamental plants. Identifying the chemical basis underlying floral scents among different ornamental crabapples can provide foundations for the fragrance breeding of ornamental crabapple and the development of aromatic products.【Method】The flowers at the full-bloom stage of six ornamental crabapples in landscape applications, namely Malus hupehensis, Malus micromalus, Malus Strawberry Parfait, Malus Kelsey, Malus Radiant and Malus Royalty, were used as plant materials. The composition and content of their volatile compounds were analyzed using headspace-solid-phase microextraction (HS-SPME) coupled with comprehensive two-dimensional gas chromatography-time of flight mass spectrometry (GC×GC-TOF MS). The key aroma compounds of each ornamental crabapple were identified through orthogonal partial least squares-discriminant analysis (OPLS-DA) coupled with odor activity value (OAV) and relative odor activity value (ROAV), and the similarities and differences in the aroma characteristics among different ornamental crabapples were further analyzed through hierarchical clustering analysis (HCA).【Result】A total of 154 volatile compounds were identified, comprising 36 terpenes and derivatives, 50 benzenoids/phenylpropanoids, 65 fatty acid derivatives, and 3 amino acid derivatives. The aroma composition and content among different tested ornamental crabapples exhibit significant differences. For each single ornamental crabapple, 53-95 kinds of compounds were detected, and the total content ranging from 7.95 to 38.31 μg·g-1. Among the materials, M. Radiant contains the most types of volatile compounds, M. Strawberry Parfait contains the highest total content, and M. micromalus contains the fewest categories and the lowest content. The OPLS - DA model had a good fitting effect (R2X=0.972, R2Y=0.991, Q2=0.974), which could effectively distinguish the volatile compounds of different ornamental crabapples, with 27 volatile compounds making important contributions to distinguishing their aroma characteristics, mainly including linalool, indole, cinnamyl alcohol, hexa-2,4-dienal, etc. Linalool acts as the key aroma compound in M. Strawberry Parfait, M. hupehensis, M. Kelsey, and M. Royalty, while indole serves as the principal aroma material in M. Radiant and M. micromalus, with benzeneacetaldehyde also contributing significantly to the aroma of M. micromalus. These compounds form the unique aroma characteristics of each ornamental crabapple.【Conclusion】A total of 154 volatile compounds were identified in this study, and the detection performance was significantly superior to that of conventional HS-SPME-GC-MS used in previous studies. The significant differences of aroma composition and content, characteristic aroma compounds and the chemical basis underlying floral scents differences among different ornamental crabapples were clarified. Linalool, indole and cinnamyl alcohol were identified as key aroma components, and it was verified that the distinctive floral fragrance of different ornamental crabapples is not governed by a single compound, but arises from the synergistic modulation of key aroma components.

Key words: Malus spp., floral aroma, HS-SPME-GC×GC-TOF MS, linalool, indole