CHEMISTRY & BIODIVERSITY
·
2019
·Vol. 16
·期 3
·e1800581
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IF 1.449
Jia Sun,Jin-Hai Yu,Jun-Sheng Zhang,Xiu-Qing Song,Jie Bao,Hua Zhang
Fourteen chromane derivatives of seven pairs of enantiomers ( 1 – 14 ) have been obtained from the ethanolic extract of the flower buds of Tussilago farfara L. Their structures with absolute configurations have been elucidated by detailed spectroscopic analyses, chemical methods, and particularly comparison of experimental ECD spectra with theoretically computed ones. Biological evaluations revealed that they did not show cytoprotective, antimicrobial, and α - glucosidase inhibitory activities. Graphical
研究领域:
植物化学
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药理学
·
药物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Yao Fan,Xiuyun Bai,Hengye Chen,Xiaolong Yang,Jian Yang,Yuanbin She,Haiyan Fu
A novel method based on GC–MS, near-infrared (NIR) and mid-infrared (MIR) spectroscopy combined with chemometrics was established to simultaneously analyze differential volatile components (DVCs) of herb samples. Herein, Florists Chrysanthemum was adopted as the representative sample. Through the introduction of Automatic data analysis workflow (AntDAS) and one-class partial least squares discriminant analysis (O-PLSDA) model, five kinds of terpenes and five kinds of alcohols were efficiently screened as DVCs. By using the selected NIR-MIR spectra sections combined with O-PLSDA, it could achieve the accurate identification of Florists Chrysanthemum from Chrysanthemum morifolium Ramat. What’s more, since the selected spectra sections were closely related to the structural and content of DVCs, they could be further used for simultaneous quantitative analysis of DVCs combined with optimized variable-weighted least-squares support vector machine based on particle swarm optimization (PSO-VWLS-SVM). This method only adopted the same NIR-MIR sections for multiple component accurate quantification, highlighting its convenience.
研究领域:
植物学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANIMAL ECOLOGY
·
2020
·Vol. 90
·期 4
·846-858
·
IF 4.554
Hua Wang,Wenlong Zhou,Zhao Li,Karl J. Niklas,Shucun Sun
Studies show that plant defenses influence the host-use of herbivores and tend to be evolutionarily more labile than herbivore traits (e.g. feeding preferences). However, all previous studies have focused exclusively on non-volatile plant defenses thereby overlooking the roles of plant volatiles. We hypothesized that volatiles are equally important determinants of herbivore host-use and are evolutionarily more labile than herbivore traits. To test these hypotheses, the following experiments were conducted. We identified the volatiles and non-volatiles of 17 Asteraceae species and measured their relative contents. We also used a highly resolved bipartite trophic network of the 17 host species and 20 herbivorous (pre-dispersal seed predator) tephritid fly species to determine the evolutionary interactions between plants and herbivores. The chemical data showed that interspecific similarity in volatiles—but not non-volatiles and phylogenetic distance—significantly accounted for the herbivore community across the plant species; this implies that plant volatiles—but not non-volatile compounds and species identity—dictate plant-tephritid fly interactions. Moreover, we observed phylogenetic signal for non-volatiles but not for volatiles; therefore closely related herbivores do not necessarily use closely related host species with similar non-volatiles, but do tend to attack plants producing similar volatiles. Thus, plant volatiles are evolutionarily more labile than non-volatiles and herbivore traits associate with host use. These results show that the interactions between plants and herbivores are evolutionary asymmetric, shed light on the role of plant volatiles in plant–herbivore interactions, and highlight the need to include data for both volatiles and non-volatiles when investigating plant–animal interactions.
研究领域:
生态学
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进化生物学
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植物-动物互作
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DOI
高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
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2023
·
IF 4.7
Wenjuan Zhang,Zimeng Zhang,Cun Li,Xiaoxue Yu,Qing He,Chunxue You,Daowen Li,Qianying Liu,Jiaqi Zhang
Essential oils (EOs) and their volatile secondary metabolites have been proved to be effective on storage pests control, while restricted on the application due to unclear mechanism. Molecular dynamics (MD) simulations and binding free energies analysis provided an effective approach to reveal mechanism on conformational calculation. In this work, the insecticidal and repellent capacities of Praxelis clematidea and Ageratum houstonianum oils and their main components identified by gas chromatography–mass spectrometry (GC–MS) were scientifically measured. Interestingly, P. clematidea oil exhibited strong fumigant toxicity against Tribolium castaneum (LC 50 = 7.07 mg/L air). Moreover, two EOs exhibited over 80% repellent rate against T. castaneum at the highest concentration of 78.63 nL/cm 2 . Furthermore, hundreds of enzymes related to the regulation of biological processes of T. castaneum were screened to explore the underlying molecular mechanism and develop promising insecticides. Besides, top hits were subjected to MD simulations and binding free energies analysis to elucidate complex inter-molecular stability and affinity over simulated time. The results demonstrated that isolongifolene, δ -cadinene, β -caryophyllene and caryophyllene oxide were prioritized as they were establishing conserved and stable interactions with residues of nuclear hormone receptor 3 ( TcHR3 ) of T. castaneum , which suggested that the four sesquiterpenes have potential to be promising insecticides on storage pests control.
研究领域:
昆虫学
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化学生态学
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分子生物学
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害虫防治
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）