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Role of terpenes from aphid-infested potato on searching and oviposition behavior of Episyrphus balteatus

Insect Science 2007年第1期14卷 57-63页

作者： NICOLAS HARMEL RAKI ALMOHAMAD MARIE-LAURE FAUCONNIER PATRICK DU JARDIN FRANCOIS VERHEGGEN MICHEL MARLIER ERIC HAUBRUGE FREDERIC FRANCIS Department of Functional and Evolutionary Entomology Department of Plant Biology Department of General and Organic Chemistry Gembloux Agricultural University Gembloux Belgium

To cope with pathogen and insect attacks, plants develop different mechanisms of defence, in both direct （physical and chemical） and indirect ways （attractive volatiles to entomophagous beneficials）. Plants are then able to express traits that facilitate ＂top-down＂ control of pests by attracting herbivore predators. Here we investigate the indirect defence mechanism of potato plants by analyzing the volatile patterns of both healthy and aphid- infested plants. Important changes in the emitted terpene pattern by the Myzus persicae infested host plant were observed. Using Solid Phase MicroExtraction （SPME） and GC-MS, the （E）-fl-farnesene （EBF） appeared to be emitted by aphid-infested potato and not by healthy plants. To assess the infochemical role of these volatile releases after aphid damage on the aphidophagous predators Episyrphus balteams, the hoverfly foraging behavior was assessed using the Observer 5.0 software （Noldus, Wageningen, The Netherlands）. Aphidfree potato plants were also used as a control volatile source in the predator behavioral study. While aphid-infested plants induced efficient searching and acceptation behaviors leading to egg-laying, no kairomonal effect of healthy potato plants was observed, leading to longer immobility durations and shorter searching periods in the net cage. High oviposition rate of E. balteatus was observed when aphid-infested potato was used （mean of 48.9 eggs per laying and per female）. On the other hand, no egg was produced by the hoverfly on healthy aphid-free plants. The E. balteatus foraging and reproductive behaviors according to the volatile emission from aphid-infested plants are discussed in relation to the potential use of active infochemical molecules in integrated aphid pest management.

关键词： aphid infested behavior Episyrphus balteatus potato terpenes

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Image Acquisition and Parameter Calculations for Optimization of the Automatic Identification of terpenes in a Combined Laser Thin Film Extract

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Advances in Materials Physics and Chemistry 2022年第6期12卷 141-154页

作者： Theodore Guié Toa Bi Wognin Vangah Alico Nango Jérôme Sié Ouattara Alain Clement UFR Science and Technology University of Man Man Ivory Coast Laboratory of Communication and Information Science and Technology (LSTCI) National Polytechnic Institute Houphou&euml t Boigny Yamoussoukro C&ocirc te d’Ivoire University Institute of Technology of Angers (IUT) Angers France

In this work, we propose an original approach to the thin-layer identification of secondary metabolites (terpenes) based on the acquisition of multicomponent images integrating terpenes to be identified. Its principle consists initially of segmentation by region of each component of the image based on the attribute tuples or colors of each region of the digital image. Then we proceeded to the calculations of region parameters such as standard deviation, entropy, average pixel color, eccentricity from an algorithm on the matlab software. These values allowed us to build a database. Finally, we built an algorithm for identifying secondary metabolites (terpenes) on the basis of these data. The relevance of our method of identifying or recognizing terpenes has been demonstrated compared to other methods, such as the one based on the calculation of frontal ratios which cannot discriminate between two terpenes having the same frontal ratio. The robustness of our method with respect to the identification of linalool, limonene was tested.

关键词： Thin Film terpenes Segmentation Entropy

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Cytotoxic terpenes from Abies sibirica

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Chinese Chemical Letters 2012年第11期23卷 1251-1253页

作者： Gui Rong Wang Yong Li Li Wei Dong Zhang Xian Wen Yang Wen Cong Liu Ji Ye Zhi Jun Zhu Hong Chen Department of Phytochemistry School of PharmacySecond Military Medical UniversityShanghai 200433China Department of Pharmacognosy Jilin Agricultural UniversityChangchun 130118China School of Pharmacy Shanghai Jiao Tong UniversityShanghai 200240China

One new and 16 known compounds were isolated from Abies sibirica. Their structures were assigned mainly on the basis of NMR and MS spectroscopic data. In bioassay for anti-proliferative activity against four human tumor cells, compound 7 exhibited selective anti-proliferative activity against COLO-205 tumor cell with an IC50 value of 0.9 μg/mL.

关键词： Abies sibirica Pinaceae terpenes Triterpene

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Evaluation of terpenes’Degradation Rates by Rumen Fluid of Adapted and Non-adapted Animals

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Natural Products and Bioprospecting 2021年第3期11卷 307-313页

作者： I.Poulopoulou I.Hadjigeorgiou Faculty of Science and Technology Free University of BolzanoUniveritätsplatz 539100 Bozen-BolzanoItaly Department of Nutritional Physiology and Feeding Faculty of Animal Science and AquacultureAgricultural University of Athens75 Iera Odos11855 AthensGreece

The aim of the present study was to evaluate terpenes degradation rate in the rumen fluid from adapted and non-adapted *** castrated healthy animals,two rams and two bucks,were *** were daily orally dosed for 2 weeks with 1 g of each of the following terpenes,α-pinene,limonene andβ-*** the end of each week,rumen fluid(RF)samples were assayed in vitro for their potential to degrade terpenes over *** each animal,a 10 mL reaction medium(RM)at a ratio 1:9(v/v)was prepared and a terpenes solution at a concentration of 100μg/ml each,was added in each RM *** were incubated at 39℃ under anaerobic conditions and their contents sampled at 0,2,4,8,21 and 24 *** could degrade terpenes as it was shown by the significantly(Pterpenes can be degraded in the rumen fluid.

关键词： terpenes Degradation Rumen Sheep Goats

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Synergistic Effects of CO_2 and LED Lighting on Accumulation of terpenes in Roots of Gynura bicolor

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Chinese Herbal Medicines 2014年第3期6卷 228-236页

作者： Jin Ren Shuang-sheng Guo Quan-yong Cheng Yun-ze Shen Hong-qi Feng Faculty of Life Sciences Northwestern Polytechnical University National Key Laboratory of Human Factors Engineering China Astronaut Research and Training Center

Objective To investigate the essential oil profile and terpenes accumulation in the roots of Gynura bicolor （Asteracese） treated by CO2 and LED lighting. Methods G. bicolor herbs were treated by CO2 at the levels of 450 （control） and 1200 （elevated） μmol/mol and LED lighting with white light, RB20 （red/blue=8/2） and RB40 （red/blue=6/4）. Headspace solid-phase micro-extraction-GC MS was employed to analyze terpenes from the essential oil of the roots. Results In all treated-roots, the major components of terpenes were （E）-β-farnesene, α-, β-caryophyllene, α-, β-, γ-elemene, and α-pinene. Increasing CO2 significantly decreased mono- and sesqui-terpenes in the roots under all light conditions, leading to the decreasing yields of the essential oils. terpenes were at a higher level in RB20-treated roots than that in RB40-treated ones under both control and elevated CO2. Conclusion CO2 （450 μmol/mol） and 20 % blue LED lights are more conducive to the accumulation of terpenes in the roots than 1200 μmol/mol CO2 and 40% blue LED lights.

关键词： Asteraceae CO2 Gynura bicolor, LED lighting terpenes

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terpenes of the Essential Oil from Ipomoea alba Leaf in Response to Herbivore and Mechanical Injuries

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Journal of Botanical Research 2022年第3期4卷 9-14页

作者： JoséL.S.de Almeida Clécio S.Ramos Department of Chemistry Rural Federal University of Pernambuco52.171-030Recife-PeBrazil

There is no doubt that the chemical composition of plants,including norvolatile and volatile compounds,is widely affected by abiotic and biotic *** are able to biosynthesize a variety of secondary metabolites against actions of natural enemies,such as herbivores,fungus,virus and *** present study revealed that the chemical compositions of leaf essential oils from Ipomoea alba underwent quantitative and qualitative alterations both when infested with the grasshopper Elaeochlora trilineata and mechanically *** attack and mechanical wounding induced the biosynthesis of nine volatile compounds in leaves of ***:cumene,α-ylangene,β-panasinsene,β-gurjunene aromadendrene,β-funebrene,spirolepechinene,cubenol and *** amount of germacrene D(33.2%to 20.4%)decreased when the leaves were mechanically damaged;but when the leaves were attacked by a grasshopper,the germacrene D increased from 33.2%to 39.4%.The results showed that *** leaves clearly responded to abiotic and biotic stress and contribute to an understanding of plant responses to stress conditions.

关键词： Elaeochlora trilineata Ipomoea alba Grasshopper Germacrene D terpenes Herbivory

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Regio-and Stereoselective Polymerization of Bio-based Ocimene by Rare-Earth Metal Catalysts

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Chinese Journal of Polymer Science 2024年第2期42卷 223-229,I0008页

作者： Qi-Yuan Wang Li-Peng Sang Zhen Zhang Yang Jiang Hui Tian Xia Zhao Xiang Guo Shi-Hui Li State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China Science and Technology on Aerospace Chemical Power Laboratory Hubei Institute of Aerospace ChemotechonologyXiangyang441003China Shanxi Coal Chemical Industry Technology Research Institute Xi’an710000China Hubei Institute of Aerospace Chemotechonology Xiangyang441003China

Coordination polymerization of renewable β-ocimene has been investigated using asymmetric diiminophosphinate lutetium complex1, β-diketiminate yttrium complex 2, bis(phosphino)carbazolide yttrium complex 3, half-sandwich benzyl fluorenyl scandium complex 4 and pyridyl-methylene-fluorenyl rare-metal complexes 5a–5c. Complexes 1, 4 and 5a–5c show trans-1,2-regioselectivities and high activities, of which 5c exhibits excellent isoselectivity(mmmm>99%). Conversely, complexes 2 and 3 promote β-ocimene polymerization to produce isotactic cis-1,4-polyocimenes(cis-1,4>99%, mm>95%). Diblock copolymers cis-1,4-PIP-block-cis-1,4-POc and cis-1,4-PBD-block-cis-1,4-POc are obtained in one-pot reactions of β-ocimene with isoprene and butadiene using complex 3. Epoxidation and hydroxylation of polyocimene afford functionalized polyolefins with enhanced T_(g)(from-20 ℃ to 79 ℃ and 74 ℃) and hydrophilicity.

关键词： Biobased monomer terpenes Ocimene Rare-earths Polymerization Regio/stereoselectivity Elastomer

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A study on monoterpenoid-based natural deep eutectic solvents

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Green Chemical Engineering 2023年第1期4卷 99-114页

作者： Sara Rozas Lorena Zamora Cristina Benito Mert Atilhan Santiago Aparicio Department of Chemistry University of BurgosBurgos09001Spain Department of Chemical and Paper Engineering Western Michigan UniversityKalamazooMI49008-5462USA

Herein,the synthesis and characterization methods of natural deep eutectic solvents based on monoterpenoids have been *** viscous fluids with suitable physicochemical properties are *** materials are non-toxic,biodegradable,and ***,they can be used to develop sustainable solvents for various processes and can find their applications in various fields.A theoretical study based on quantum chemistry and classical molecular dynamics is used for the nanoscopic characterization of structure,dynamics,and hydrogen *** reported results help analyze the properties of this new family of *** required information for developing structure–property relationships for proper solvent design to form a sustainable chemistry framework is obtained.

关键词： Natural deep eutectic solvents terpenes DFT MD COSMO-RS CO_(2)solubility

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Positive regulatory role of R2R3 MYBs in terpene biosynthesis in Lilium‘Siberia’

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Horticultural Plant Journal 2023年第5期9卷 1024-1038页

作者： Yanhong Guo Ziyu Guo Jian Zhong Yilin Liang Yuan Feng Peng Zhang Qixiang Zhang Ming Sun State Key Laboratory of Efficient Production of Forest Resources Beijing Key Laboratory of Ornamental Plants Germplasm Innovation&Molecular BreedingNational Engineering Research Center for FloricultureBeijing Laboratory of Urban and Rural Ecological EnvironmentKey Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of EducationSchool of Landscape ArchitectureBeijing Forestry UniversityBeijing 100083China

Terpenoids are the main components contributing to the fragrance of Lilium‘Siberia’,and LiTPS2 plays a critical role in the biosynthesis of *** the major terpene synthases in Lilium‘Siberia’have been identified,how these TPS genes are transcriptionally regulated remains elusive in this distinguished *** study aimed to identify transcription factors that regulate the terpene synthesis in Lilium,and disclose the related underlying transcriptional regulation *** this study,we identified three R2R3-MYB TFs—LiMYB1,LiMYB305 and LiMYB330,which were involved in regulating the biosynthesis of terpenes in Lilium‘Siberia’.Quantitative real-time PCR showed spatial and temporal expression patterns consistent with the emission patterns of terpene *** LiMYB1,LiMYB305 and LiMYB330were overexpressed in flowers,the release of some main monoterpenes,such as linalool and ocimene,as well as the expression of TPS genes,especially for LiTPS2,were enhanced.A virus-induced gene silencing(VIGS)assay showed that silencing these three LiMYBs decreased the level of monoterpenes by down-regulating the expression of the TPS *** yeast one-hybrid and transient expression assays indicated that all three LiMYBs could bind to and activate the promoter of ***,the yeast two-hybrid assay verified that LiMYB1 could interact with LiMYB308 and LiMYB330,indicating their synergistic roles in the regulation of floral terpene *** general,these results indicated that LiMYB1,LiMYB305,and LiMYB330 might play essential roles in terpene biosynthesis in Lilium and would provide a new perspective for the transcriptional regulation of volatile terpenes in flowers.

关键词： Lilium R2R3-MYB Expression analysis terpenes Regulation

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Effects of co-administration of Ganoderma terpenoid extract with chloroquine on inflammatory markers and antioxidant status in Plasmodium berghei-infected mice

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Journal of Integrative Medicine 2020年第6期18卷 522-529页

作者： Olarewaju M.Oluba Oghenerobor B.Akpor Feyikemi D.Adebiyi Sunday J.Josiah Olayinka O.Alabi Ayoola O.Shoyombo Augustine O.Olusola Department of Biochemistry Food Safety&Toxicology Research UnitCollege of Pure&Applied SciencesLandmark UniversityOmu-AranKwara State 251101Nigeria Department of Microbiology College of Pure&Applied SciencesLandmark UniversityOmu-AranKwara State 251101Nigeria Department of Chemical Sciences Joseph Ayo Babalola UniversityIkeji-ArakejiOsun State 233121Nigeria Department of Medical Biochemistry College of Basic Medical SciencesIgbinedion UniversityOkadaEdo State 302110Nigeria Department of Animal Science College of Agricultural SciencesLandmark UniversityOmu-AranKwara State 251101Nigeria Department of Biochemistry Adekunle Ajasin UniversityAkungba AkokoOndo State 342111Nigeria

Objective:To understand the protective effects of Ganoderma terpenoid extract(GTE)against Plasmodium berghei-malarial infection in mice,the present study was carried out to evaluate the effects of GTE in combination with chloroquine disulphate(CQ)on erythrocyte-selected inflammatory markers and antioxidant defense status in ***-infected ***:***-infected mice were divided into six groups:infected control(IC)group,administered 1 mL Tween 20;GTE100 and GTE250 groups,administered 100 and 250 mg/kg GTE,respectively;GT100+CQ and GT250+CQ groups,co-administered 100 and 250 mg/kg GTE plus 30 mg/kg CQ,respectively;and CQ group,administered 30 mg/kg CQ.A separate group of non-infected mice were given 1 m L Tween 20,and served as a normal control group(NC).Extract and drug were dissolved in Tween20 and administered orally once daily for 12 consecutive *** the end of the treatment period,mice were anesthetized with chloroform and sacrificed by cervical *** was prepared from blood obtained from each *** evaluated at the end of the treatment period include parasitemia,red blood cell count,hematocrit,malondialdehyde(MDA),glutathione(GSH),catalase(CAT),glutathione peroxidase(GPx),superoxide dismutase(SOD),tumor necrosis factor-a(TNF-a),and interleukin-10(IL-10).Results:Infected mice treated with a combination of GTE and CQ(GT100+CQ and GT250+CQ groups)showed significantly reduced parasitemia levels(P<0.05)compared to those administered GTE alone as well as *** improvement in body weight(P<0.05)was also observed in infected mice treated with a combination of GTE and CQ(GT100+CQ and GT250+CQ groups),compared to mice receiving GTE alone(GTE100 and GTE250 groups).Plasma MDA and TNF-a concentrations were significantly lowered,and IL-10 concentration was significantly increased in GT100+CQ and GT250+CQ groups,relative to the IC group(P<0.05).GSH concentration and SOD,CAT and GPx activities were significantly higher in GT100+

关键词： Ganoderma terpenes Malaria Oxidative stress Antioxidants Anti-inflammatory agents

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