PEST MANAGEMENT SCIENCE
·
2015
·Vol. 72
·期 4
·816-827
·
IF 2.694
Lulu Dai,Junning Ma,Mingyuan Ma,Haoqiang Zhang,Qi Shi,Ranran Zhang,Hui Chen
BACKGROUND Bark beetles rely on their detoxifying enzymes to resist the defensive terpenoids of host trees. Glutathione S -transferases (GSTs) conjugate xenobiotic compounds with a glutathione moiety (GSH) and often work in tandem with cytochromes P450 or other enzymes that aid in the detoxification, sequestration or excretion of toxic compounds. RESULT We identified nine new GST genes in the Chinese white pine beetle ( Dendroctonus armandi ) and carried out a bioinformatics analysis on the deduced full-length amino acid sequences. These genes belong to four different classes (epsilon, sigma, omega and theta). Differential transcript levels of each class of GST genes were observed between sexes, and, within these levels, significant differences were found among the different adult substages that were fed phloem of Pinus armandi and exposed to six stimuli [(±)- α -pinene, (−)- α -pinene, (−)- β -pinene, (+)-3-carene, (±)-limonene and turpentine] at 8 and 24 h. CONCLUSION The increased transcription levels of GST genes suggested that they have some relationship with the detoxification of terpenoids that are released by host trees. The mediating oxidative stress that is caused by monoterpene might be the main role of the bark beetle GSTs. © 2015 Society of Chemical Industry
研究领域:
昆虫学
·
分子生物学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION C-A JOURNAL OF BIOSCIENCES
·
2022
·
IF 1.885
Xiujuan Pan,He Xiao,Xinping Hu,Zhi Long Liu
The aim of this research was to evaluate insecticidal activities of the essential oil of Rhynchanthus beesianus rhizomes against adults of Liposcelis entomophila and Tribolium castaneum . Gas chromatography-mass spectrometry analyses revealed the presence of 44 compounds with β -eudesmol (19.1%), elemol (8.1%), α -terpineol (8.0%), methyl eugenol (6.5%), and caryophyllene (4.8%) being the major constituents. Bioactivity-directed chromatographic separation of the oil led to the isolation of four constituents, elemol, β -eudesmol, methyl eugenol, and α -terpineol. The essential oil exhibited fumigant toxicity against the adults of L. entomophila and T. castaneum with LC 50 values of 0.57 and 4.96 mg/L air while the two isolates, methyl eugenol and α -terpineol possessed fumigant toxicity against the booklice (LC 50 = 0.15 and 0.48 mg/L air, respectively) and the beetles (LC 50 = 1.81 and 4.96 mg/L air, respectively). The oil also possessed contact toxicity against the booklice and the beetles with LD 50 values of 121.56 μg/cm 2 and 54.93 μg/adult, respectively, while the two isolates β -eudesmol and elemol showed contact toxicity against L. entomophila (LD 50 = 99.21 and 35.19 μg/cm 2 , respectively) and T. castaneum (LD 50 = 35.26 and 8.89 μg/adult, respectively). The results indicate that the oil of R. beesianus rhizomes and its isolates have potential as a source for natural insecticides.
研究领域:
植物化学
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昆虫学
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天然产物研究
✓ 已验证
DOI
PubMed
高影响因子
Journal of Oleo Science
·
2022
·
IF 1.628
Yi-Xi Feng,Xin-Xin Lu,Yue-Shen Du,Yu Zheng,Ding Zeng,Shu-Shan Du
Stored products have been damaged by insects. Multiple approaches for pest management are employed. Among these approaches, botanical insecticide is an emerging one. This work investigated the pest management potential of Magnolia coriacea and Magnolia macclurei essential oils (EOs) to three major stored-product insects, namely the red flour beetle, cigarette beetle and booklouse. Magnolia coriacea and M. macclurei EOs showed promising contact toxicity to the cigarette beetle, with LD50 values of 11.7 and 12.3 μg/adult. The contact toxicity of M. coriacea EOs to the booklouse (LC50 = 95.5 μg/cm2) was much stronger than that of M. macclurei EOs (LC50 = 245.4 μg/cm2). To explore the contribution of individual compounds to insecticidal activity of EOs, chemical analysis was performed by GC-MS. Results showed that nerolidol (27.84%), agarospirol (18.34%), elixene (15.84%) and helminthogermacrene (12.69%) were major compounds of M. coriacea EOs, β-guaiene (60.31%) and elixene (20.42%) dominated in M. macclurei EOs. Nerolidol and β-guaiene showed contact activity to three insect species. Nerolidol showed stronger contact toxicity to the red flour beetle and cigarette beetle than M. coriacea EOs did, both samples were similar to the booklouse. β-Guaiene was much stronger to the red flour beetle and booklouse, but weaker to the cigarette beetle than M. macclurei EOs did. The repellent effects of EOs and compounds were at various levels. Generally, results suggested that the contact toxic potential of samples could serve as management for the cigarette beetle and booklouse, while repellent effect would be used to control the red flour beetle.
研究领域:
植物学
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昆虫学
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害虫管理
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化学生态学
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产品关联
DOI
PubMed
高影响因子
ENTOMOLOGICAL RESEARCH
·
2024
·Vol. 54
·期 12
·e70009
·
IF 1.2
Shanshan Gao,Mengyi Guo,Weicheng Yu,Wenbo Miao,Haofei Ya,Dongfeng Liu,Ruimin Li,Kunpeng Zhang
The red flour beetle, Tribolium castaneum , is an agricultural and storage pest with a global distribution. Studies have shown that eucalyptol has strong contact toxicity against larvae of this beetle, whereas odorant binding proteins (OBPs) are known to contribute to larval defenses against this phytochemical toxin. However, the mechanisms underlying the protective effect of insect OBP s against eucalyptol remain unclear. Here, TcOBPC02 from T . castaneum was cloned and characterized. Gene expression profile analysis showed that TcOBPC02 is highly expressed at early larval and early pupal stages. Additionally, tissue expression profiling revealed that, in the adult, TcOBPC02 was most highly expressed in the head, followed by the epidermis, whereas in larvae, TcOBPC02 was mainly expressed in hemolymph and the epidermis. These developmental stages and tissues that exhibit high TcOBPC02 expression are closely related to the detoxification of heterologous substances. Furthermore, the mRNA level of TcOBPC02 was significantly increased after exposure to eucalyptol, whereas TcOBPC02 -targeted RNA interference increased the susceptibility of T. castaneum to eucalyptol, indicating that TcOBPC02 participates in the tolerance of this beetle to eucalyptol. Additionally, recombinant TcOBPC02 was expressed in Escherichia coli and isolated, enabling a straightforward fluorescence competition binding assay. In combination, these results have demonstrated that TcOBPC02 is required for defenses against phytochemicals in T. castaneum . This study provides a theoretical basis for understanding the mechanisms underlying the degradation of exogenous toxicants in insects and adds to the repertoire of potential target genes for pest control.
研究领域:
昆虫学
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分子生物学
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害虫防治
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Jing Feng,Lieshuang Zhong,Zhiguang Guo
A desert beetle-inspired surface with alternating wettability has shown great potential in fog harvesting, which allows for the easy acquisition of fresh water. The fog harvesting mechanism has been deeply understood via the efforts of many scientists. Current studies focus on the effective fabrication of the fog harvesting material, and facile fabrication can greatly enhance its real application. In this work, using a simple spraying method and selective modification of mercaptan, we successfully fabricated a biomimetic surface with hybrid wettability consisting of a hydrophobic micro-particle/hydrophilic nano-particle hierarchical structure. When the mass ratio of Cu 2 O microparticles to ZrO 2 nanoparticles in the spraying suspension was 8:1, the as-prepared hybrid sample had the highest fog collection efficiency of approximately 1707.25 mg·cm −2 ·h −1 , which was two times higher than that of the superhydrophilic sample, showing prominent enhancement of the fog harvesting capacity. The special hierarchical structure can facilitate the water harvesting behaviour. The fabrication method has a low production cost and is facile, making the large-scale manufacture of fog harvesting collectors possible.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Guangyi Tian,Changhui Fu,Zhiguang Guo
Water scarcity is a global problem and collecting water from the air is a viable solution to this crisis. Inspired by Namib Desert beetle, leaf venation and spider silk, we designed an integrated biomimetic system with hybrid wettability and wettability gradient. The hybrid hydrophilic–hydrophobic wettability design that bionomics desert beetle’s back can construct a three-dimensional topography with a water layer on the surface, expanding the contact area with the fog flow and thus improving the droplet trapping efficiency. The venation-like structure with wettability gradient not only provides a planned path for water transportation, but also accelerates water removal under the synergistic effect of gravity and wettability driving force, thus further improving the surface regeneration rate. The collector combines droplet capture, coalescence, transportation, separation, and storage capabilities, which provides new ideas for the design of future high-efficiency fog collectors.
研究领域:
材料科学
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环境科学
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生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Plant Science
·
2022
·
IF 6.627
Shi Xia,Fang Jiaxing,Du Huicong,Zhang Sufang,Liu Fu,Zhang Zhen,Kong Xiangbo
When Ips bark beetles invade and colonize the host plants, their associated pathogenic fungal partners are carried into the phloem of the host trees. Host trees are lethally attacked by the beetle-fungus complex and the collective damage severely limits forestry production worldwide. It is of great importance to verify whether bark beetles and their associated fungi show concordant performance in terms of biology, physiology, and biochemistry on host trees. In this study, the two Ips bark beetles Ips typographus and Ips subelongatus (Coleoptera: Curculionidae, Scolytinae), their respective associated pathogenic fungi Endoconidiophora polonica and Endoconidiophora fujiensis, and their respective host plants Picea jezoensis and Larix olgensis were selected as test material. Cross-inoculation experiments were conducted indoors and outdoors to investigate the differences in reproduction and development of two beetles and infectivity of two fungi on two plants, as well as the differences in physiological responses of two plants to two fungal infections. The results showed that I. typographus and E. polonica had excellent host performance on P. jezoensis; however, neither successfully colonized and infected L. olgensis. In contrast, I. subelongatus and E. fujiensis showed strong host suitability on L. olgensis and some degree of suitability on P. jezoensis, although the host suitability of P. jezoensis for E. polonica was significantly higher than that for E. fujiensis. In addition, we found that the absolute amount of ergosterol accumulated on the lesion was positively correlated with lesion area. The ergosterol amount and lesion area were both strongly correlated with the release of host monoterpenes, but had no obvious correlation with the concentration of fungi-induced phenols on the lesion area and the side-chain oxidation of lignin in the xylem of the infected sites. Based on these results, we confirmed that “I. typographus-E. polonica” and “I. subelongatus-E. fujiensis” complexes both showed the most suitable consistent performances on their own traditional hosts, establishing a stable species-specific association relationship in these two beetle-fungus complexes, with the “I. subelongatus-E. fujiensis” complex showing broader host suitability. From the perspective of physiological responses of plants to fungal infections, monoterpenes are an important indicator of host suitability.
研究领域:
昆虫学
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植物病理学
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森林生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2023
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IF 8.4
Jingwen Yao,Yanbo Yao,Tao Liu
By mimicking the structure of the infrared-sensing organs of the “fire-beetles” of genus Melanophilaacuminata, we herein designed and fabricated an all-soild “fire-beetles” inspired infrared sensor, the key components of which is composed of a stress-concentrated photothermal expansion dendrite structure made of polydopamine enabled polydimethylsiloxane nanocomposite elastomer and a highly-sensitive piezoresistive membrane processed by direct laser writing carbonization. Our sensor possesses bolometric and photomechanic dual sensing modes, with the optimal responsivity of −1.4 W −1 and 2.2 W −1 , the detection limit of 0.03 mW/√Hz and 0.23 mW/√Hz, as well as the response time of 3.8 s and 2.5 s, respectively. The two-step photothermal and solid mechanics FEA modeling was performed to help understanding its sensing behavior in both bolometric and photomechanic operation modes, which indicates the possibility for orders-of-magnitude improvement on the responsiveness of our “fire-beetles” inspired IR sensor when increasing the bonding strength between the photothermal dendrite tip and the piezoresistive sensing membrane. The all-solid nature and the piezoresistive read-out scheme as well as its good performance make our sensor valuable for low-cost IR sensing applications.
研究领域:
仿生学
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材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2021
·Vol. 247
·期 10
·2609-2619
·
IF 2.998
Liang Junyu,Ning Anqi,Lu Peiyu,An Yue,Wang Zuoliang,Zhang Ji,He Chunyu,Wang Yongfeng
Stored-product pests are a major problem in food production and storage. Essential oils (EOs) have been reported to have a wide range of insecticidal activities. In this study, the EOs of flowers and leaves from Elsholtzia stauntoni were analyzed for their chemical composition by GC–MS. The two EOs and their two common main components (cuminol and caryophyllene) were evaluated for their bioactivities against T. castaneum adults. Results of GC–MS analysis indicated that the chemical composition of EOs of flowers and leaves from E. stauntoni had certain similarity and diversity. The two same major components of EOs of flowers and leaves were cuminol (27.81% and 27.62%, respectively) and caryophyllene (5.78% and 10.95%, respectively). The results of bioassays indicated that the EOs of flowers and leaves possessed obvious contact toxicities (LD 50 = 19.05 and 18.75 µg/Adult, respectively) and repellent activities against T. castaneum . In addition, the EOs of flowers (LC 50 = 16.26 mg/L Air) showed the higher fumigant toxicity than that of leaves (LC 50 = 44.42 mg/L Air). Cuminol and caryophyllene exhibited contact toxicity and repellency against T. castaneum , but showed no fumigant toxicity. In particular, cuminol was still significantly repellent to T. castaneum within the testing concentration range of 78.63–0.13 nL/cm 2 after 48 h. Furthermore, cuminol and caryophyllene exhibited synergistic contact activity against T. castaneum in all experimental ratios. Altogether, it suggests that EOs of E. stauntoni and their two major monomers have promising potential to serve as bio-insecticides for controlling T. castaneum .
研究领域:
植物学
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昆虫学
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食品保护
✓ 已验证
DOI
高影响因子
Matter
·
2024
·
IF 17.3
Xiaoyu Hou,Kaiyue Zhang,Xintao Lai,Liwei Hu,Florian Vogelbacher,Yanlin Song,Lei Jiang,Mingzhu Li
Passive daytime radiative cooling is regarded as a promising technology to achieve all-day subambient cooling without energy consumption and pollution. The installation of monotonous white radiative cooling coating on the facades of buildings poses challenges in terms of aesthetic integration. Fabricating radiative cooling coatings with different colors and high cooling efficiency at a low cost is an optimal solution for their broad adoption and commercialization. Here, inspired by the elytra of the scarab beetle, we design a hierarchically porous nested structured radiative cooling film with high subambient cooling efficiency and flexible color tunability. This film exhibits both high solar reflectance (93.4%) and superior thermal emissivity (92.3%), realizing subambient cooling of ∼10.2°C at night and ∼7.2°C at midday. Its color is brilliant, stable, and flexible. Additionally, this film is self-cleaning and can reduce noise, which suggests possibilities for the development of multifunctional radiative cooling surfaces in building envelopes, automobile coatings, and clothes.
研究领域:
材料科学
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建筑技术
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Feifeng Hu,Guangyi Tian,Huayang Zhang,Zhiguang Guo
The shortage of freshwater resources has a great impact on the daily life of human beings, and fog collection has become an effective mitigation measure. In this paper, inspired by the nanofabricated desert beetle, honeycomb, Euphorbia antiquorum L. and cactus, a 3D fog collector combining a conical array structural gradient and a wettability gradient was presented, with special three-dimensional array structure (TA-L/B (PPC)) that ensures that the fog-collecting efficiency of the samples is virtually independent of the direction of the fog flow. The fog collection efficiency of sample TA-L/B (PPC) is close to 4.3 g·h −1 ·cm −2 , a value that is 1.77 times higher than the surface fog collection efficiency of the copper sheet (OS) sample. By rationally designing the surface structure of the sample, the fog circulation process is accelerated, and a sustainable and stable fog collection process is achieved.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY
·
2015
·
IF 3.45
Lulu Dai,Mingyuan Ma,Chunyan Wang,Qi Shi,Ranran Zhang,Hui Chen
Bark beetles oxidize the defensive allelochemicals from their host trees to both detoxify and convert these materials into components of their pheromone system. The ability of this insect to adapt to its chemical environment might be explained by the action of major detoxification enzymes such as cytochrome P450s (or CYPs). Sixty-four sequences coding for P450s were identified, and most of the transcripts were found to be expressed in the larvae, pupae and adults of Dendroctonus armandi . To gain information on how these genes help D. armandi overcome the host defense, differential transcript levels of the CYP genes were observed between sexes and within the sexes. Significant differences were observed among developmental stages, in feeding on the phloem of Pinus armandi and in exposure to stimuli ((±)-α-pinene, (S)-(−)-α-pinene, (S)-(−)-β-pinene, (+)-3-carene, (±)-limonene and turpentine oil) for 8 h. We investigated the effect of sex and generations on the survivorship of individual D. armandi that were exposed to host volatiles at concentrations comparable to constitutive and induced levels of defense using fumigant exposure to understand the ability of the beetles to tolerate host defensive chemicals. The differential transcript accumulation patterns of CYP genes of these bark beetle provided insight into the ecological interactions of D. armandi with its host pine.
研究领域:
昆虫学
·
分子生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）