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题名: Peltate glandular trichomes of Colquhounia seguinii harbor new defensive clerodane diterpenoids
作者: Li, Chun-Huan1, 2; Liu, Yan1; Hua, Juan1; Luo, Shi-Hong1; Li, Sheng-Hong1
刊名: JOURNAL OF INTEGRATIVE PLANT BIOLOGY
出版日期: 2014-09-01
卷号: 56, 期号:9, 页码:928-940
关键词: Colquhounia seguinii Vaniot ; peltate glandular trichomes ; laser microdissection ; clerodane diterpenoids ; antifeedant and antifungal activities
学科分类: Biochemistry & Molecular Biology ; Plant Sciences
DOI: 10.1111/jipb.12242
通讯作者: Li,SH (reprint author),Chinese Acad Sci,Kunming Inst Bot,State Key Lab Phytochem & Plant Resources West Ch,Kunming 650201,Peoples R China. ; shli@mail.kib.ac.cn
文章类型: Article
英文摘要: Glandular trichomes produce a wide variety of secondary metabolites that are considered as major defensive chemicals against herbivore attack. The morphology and secondary metabolites of the peltate glandular trichomes of a lianoid Labiatae, Colquhounia seguinii Vaniot, were investigated. Three new clerodane diterpenoids, seguiniilactones A-C (1-3), were identified through precise trichome collection with laser microdissection, metabolic analysis with ultra performance liquid chromatography-tandem mass spectrometer, target compound isolation with classical phytochemical techniques, structure elucidation with spectroscopic methods. All compounds showed significant antifeedant activity against a generalist plant-feeding insect Spodoptera exigua. Seguiniilactone A (1) was approximately 17-fold more potent than the commercial neem oil. -Substituted ,-unsaturated -lactone functionality was found to be crucial for strong antifeedant activity of this class of compounds. Quantitative results indicated that the levels of these compounds in the peltate glandular trichomes and leaves were sufficiently high to deter the feeding by generalist insects. Moderate antifungal activity was observed for seguiniilactone C (3) against six predominant fungal species isolated from the diseased leaves of C. seguinii, while seguiniilactones A and B were generally inactive. These findings suggested that seguiniilactones A-C might be specialized secondary metabolites in peltate glandular trichomes for the plant defense against insect herbivores and pathogens.
类目[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
研究领域[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
关键词[WOS]: EXPRESSED SEQUENCE TAGS ; PLANT TRICHOME ; TERPENOID BIOSYNTHESIS ; ANTIFEEDANT ACTIVITY ; CASEARIA-SYLVESTRIS ; CANNABIS-SATIVA ; SALVINORIN-A ; LOCALIZATION ; LABIATAE ; PATHWAY
收录类别: SCI
语种: 英语
WOS记录号: WOS:000341915900011
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/18389
Appears in Collections:植物化学与西部植物资源持续利用国家重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources West Ch, Kunming 650201, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Li,Chun-Huan;Liu,Yan;Hua,Juan;Luo,Shi-Hong;Li,Sheng-Hong.Peltate glandular trichomes of Colquhounia seguinii harbor new defensive clerodane diterpenoids,JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2014,56(9(SI)):928-940
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