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https://www.readbyqxmd.com/read/28480618/beyond-chemoreception-diverse-tasks-of-soluble-olfactory-proteins-in-insects
#1
Paolo Pelosi, Immacolata Iovinella, Jiao Zhu, Guirong Wang, Francesca R Dani
Odorant-binding proteins (OBPs) and chemosensory proteins (CSPs) are regarded as carriers of pheromones and odorants in insect chemoreception. These proteins are typically located in antennae, mouth organs and other chemosensory structures; however, members of both classes of proteins have been detected recently in other parts of the body and various functions have been proposed. The best studied of these non-sensory tasks is performed in pheromone glands, where OBPs and CSPs solubilise hydrophobic semiochemicals and assist their controlled release into the environment...
May 7, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28444322/fumigant-activity-of-sweet-orange-essential-oil-fractions-against-red-imported-fire-ants-hymenoptera-formicidae
#2
Wei Hu, Ning Zhang, Hongli Chen, Balian Zhong, Aixue Yang, Fan Kuang, Zhigang Ouyang, Jiong Chun
Sweet orange oil fractions were prepared by molecular distillation of cold-pressed orange oil from sample A (Citrus sinensis (L.) 'Hamlin' from America) and sample B (Citrus sinensis Osbeck 'Newhall' from China) respectively, and their fumigant activities against medium workers of red imported fire ants (Solenopsis invicta Buren) were investigated. The volatile composition of the orange oil fractions was identified and quantified using GC-MS. Fractions from sample A (A1, A2, and A3) contained 23, 37, and 48 chemical constituents, and fractions from sample B (B1, B2, and B3) contained 18, 29, and 26 chemical constituents, respectively...
April 21, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28444203/a-chemosensory-protein-gene-si-csp1-associated-with-necrophoric-behavior-in-red-imported-fire-ants-hymenoptera-formicidae
#3
Hua-Long Qiu, Dai-Feng Cheng
Necrophoric behavior is essential to colony health in social insects. Little is known about the genes that are responsible for necrophoric behavior. Here, we show that a chemosensory protein gene Si-CSP1 was expressed significantly higher in the antennae than in other tissues such as the legs and heads of Solenopsis invicta Buren workers. Furthermore, Si-CSP1-silenced workers moved significantly fewer corpses of their nestmates than normal workers. Finally, Si-CSP1-silenced workers exhibited weaker antennal responses to oleic acid and linoleic acid than controls...
June 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28402466/efficacy-of-nootka-oil-as-a-biopesticide-for-management-of-imported-fire-ants-hymenoptera-formicidae
#4
K M Addesso, J B Oliver, P A O'Neal, N Youssef
Recent concerns regarding the impact of traditional synthetic pesticides on nontarget organisms have generated demand for alternative products with lower environmental impact. This demand has led to increasing focus on plant essential oils as sources of new biopesticides. In this study, we demonstrate that the essential oil of the Alaskan yellow cedar, Cupressus nootkatensis (D. Don) Spach, has activity against hybrid imported fire ant workers, Solenopsis invicta Buren × Solenopsis richteri Forel. In digging assays, ants were repelled by nootka oil and digging continued to be suppressed by nearly 50% in nootka oil-treated sand aged 6 mo in the laboratory...
April 10, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28384419/are-invasive-species-stressful-the-glucocorticoid-profile-of-native-lizards-exposed-to-invasive-fire-ants-depends-on-the-context
#5
Sean P Graham, Nicole A Freidenfelds, Christopher J Thawley, Travis R Robbins, Tracy Langkilde
Invasive species represent a substantial threat to native species worldwide. Research on the impacts of invasive species on wild living vertebrates has focused primarily on population-level effects. The sublethal, individual-level effects of invaders may be equally important but are poorly understood. We investigated the effects of invasive fire ants (Solenopsis invicta) on the physiological stress response of a native lizard (Sceloporus undulatus) within two experimental contexts: directly exposing lizards to a fire ant attack and housing lizards with fire ants in seminatural field enclosures...
May 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28365770/on-the-molecular-basis-of-division-of-labor-in-solenopsis-invicta-hymenoptera-formicidae-workers-rna-seq-analysis
#6
Hua-Long Qiu, Cheng-Yin Zhao, Yu-Rong He
The fire ant Solenopsis invicta Buren is an important invasive pest. Among S. invicta workers behavioral changes depend on age where younger ants are nurses and older ants foragers. To identify potential genes associated with this division of labor, we compared gene expression between foragers and nurses by high-throughput sequencing. In total, we identified 1,618 genes significantly differently expressed between nurses and foragers, of which 542 were upregulated in foragers and 1,076 were upregulated in nurses...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28334221/enhanced-pest-ant-control-with-hydrophobic-bait
#7
R K Vander Meer, D E Milne
The red imported fire ant, Solenopsis invicta (Buren), left most of its natural enemies behind in South America when it arrived in Mobile, AL, in the 1930s and spread rapidly throughout the southeastern United States, reaching population levels up to 10 times those found in South America. The large population densities and propensity for disturbed habitats led to direct conflict with human activities. Bait control methods were first developed for fire ants in the early 1960s and little has changed in the subsequent decades, despite the drawback that the bait carrier rapidly breaks down when wet...
April 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334211/effect-of-sweeteners-on-the-survival-of-solenopsis-invicta-hymenoptera-formicidae
#8
Xiaoqiang Zhang, Siqi Chen, Zhiqiang Li, Yijuan Xu
The red imported fire ant, Solenopsis invicta Buren, is a serious agricultural, ecological, and public health pest in its invaded range. Chemical insecticides have been widely used for the prevention and control of this notorious pest. To search for novel, cost-effective, and environmentally friendly materials for fire ant control, we tested various sweeteners for their toxicity to S. invicta. The S. invicta that were fed erythritol, aspartame, and saccharin exhibited significantly higher mortality rates than those fed other sweeteners...
April 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334021/the-effect-of-remnant-forest-on-insect-successional-response-in-tropical-fire-impacted-peatland-a-bi-taxa-comparison
#9
Kok-Boon Neoh, Lee-Jin Bong, Ahmad Muhammad, Masayuki Itoh, Osamu Kozan, Yoko Takematsu, Tsuyoshi Yoshimura
Fire has become a common feature in tropical drained peatlands, and it may have detrimental impacts on the overall biodiversity of the forest ecosystem. We investigated the effect of fire on termite and ant assemblages and the importance of remnant forest in restoring species diversity in fire-impacted tropical peat swamp forests. The species loss of both termites and ants was as high as 50% in some fire-impacted peats compared to remnant forests, but in most cases the species richness for termites and ants was statistically equal along the land uses surveyed...
2017: PloS One
https://www.readbyqxmd.com/read/28273343/fire-disturbance-disrupts-an-acacia-ant-plant-mutualism-in-favor-of-a-subordinate-ant-species
#10
Ryan L Sensenig, Duncan K Kimuyu, Juan Carlos Ruiz Guajardo, Kari E Veblen, Corinna Riginos, Truman P Young
Although disturbance theory has been recognized as a useful framework in examining the stability of ant-plant mutualisms, very few studies have examined the effects of fire disturbance on these mutualisms. In myrmecophyte-dominated savannas, fire and herbivory are key drivers that could influence ant-plant mutualisms by causing complete colony mortality and/or decreasing colony size, which potentially could alter dominance hierarchies if subordinate species are more fire resilient. We used a large-scale, replicated fire experiment to examine long-term effects of fire on acacia-ant community composition...
March 8, 2017: Ecology
https://www.readbyqxmd.com/read/28220980/the-fire-ant-social-chromosome-supergene-variant-sb-shows-low-diversity-but-high-divergence-from-sb
#11
Rodrigo Pracana, Anurag Priyam, Ilya Levantis, Richard A Nichols, Yannick Wurm
Variation in social behaviour is common, yet little is known about the genetic architectures underpinning its evolution. A rare exception is in the fire ant Solenopsis invicta: Alternative variants of a supergene region determine whether a colony will have exactly one or up to dozens of queens. The two variants of this region are carried by a pair of 'social chromosomes', SB and Sb, which resemble a pair of sex chromosomes. Recombination is suppressed between the two chromosomes in the supergene region. While the X-like SB can recombine with itself in SB/SB queens, recombination is effectively absent in the Y-like Sb because Sb/Sb queens die before reproducing...
June 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28157984/high-resolution-fluorescence-bio-imaging-upconversion-nanoparticles-in-insects
#12
Masfer Alkahtani, Yunyun Chen, Julie J Pedraza, Jorge M González, Dilworth Y Parkinson, Philip R Hemmer, Hong Liang
Imaging fluorescent markers with brightness, photostability, and continuous emission with auto fluorescence background suppression in biological samples has always been challenging due to limitations of available and economical techniques. Here we report a new approach, to achieve high contrast imaging inside small and difficult biological systems with special geometry such as fire ants, an important agricultural pest, using a homemade cost-effective optical system. Unlike the commonly used rare-earth doped fluoride nanoparticles, we utilized nanoparticles with a high upconversion efficiency in water...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28092009/polycyclic-aromatic-hydrocarbons-pahs-determined-by-pine-needles-and-semipermeable-membrane-devices-along-an-altitude-profile-in-taurus-mountains-turkey
#13
Cafer Turgut, Mehmet Ali Mazmanci, Birgül Mazmanci, Melis Yalçın, PerihanBinnur Kurt Karakuş, Levent Atatanir, Menekşe Keski, Bernhard Henkelmann, Gerd Pfister, Karl-Werner Schramm
Polycyclic aromatic hydrocarbons (PAHs) were analyzed at different altitudes of Taurus Mountains in semipermeable membrane devices (SPMD) and in half-, one-and-a-half-, and two-and-a-half-year-old pine needles. SPMDs were deployed for three different exposure periods: March to September (Summer), September to March (Winter), and March to March (whole year) at eight sites where needle samples were collected. The values of PAHs in needles were between 4.4 to 6066 pg g/fw in half-year-old, 7.2 to 111,115 pg g/fw in 1...
March 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28052342/from-cryptic-herbivore-to-predator-stable-isotopes-reveal-consistent-variability-in-trophic-levels-in-an-ant-population
#14
Karl A Roeder, Michael Kaspari
Populations may collectively exhibit a broad diet because individuals have large diet breadths and/or because subpopulations of specialists co-occur. In social insect populations, the diet of the genetic individual, the colony, may similarly arise because workers are diet generalists or castes of specialists. We used elemental and isotopic methods to explore how the invasive red imported fire ant, Solenopsis invicta, achieves its status as a trophic generalist. In one 0.5-ha old field, 31 S. invicta colonies ranged from 1°-consumer to 2°-predator (δ(15) N's 0...
February 2017: Ecology
https://www.readbyqxmd.com/read/28028926/how-do-groups-of-red-imported-fire-ants-hymenoptera-formicidae-feed-on-a-droplet-of-sugar-water
#15
Cai Wang, Xuan Chen, Linda M Hooper-Bùi, Rachel Strecker, Yu-Zhen Wen, Wen-Quan Qin, Tao Ma, Zhao-Hui Sun, Xiao-Yang Chen, Xiu-Jun Wen
Many previous studies have focused on the foraging behaviors and strategies of the red imported fire ants, Solenopsis invicta Buren on solid food or granular bait, little attention has been paid to how liquid sugar is fed upon. In the present study, behavioral responses of S. invicta to 25% sucrose water droplets were observed. Five foraging patterns were identified in S. invicta colonies under laboratory conditions: (1) No feeding, no sucrose water feeding was observed; (2) surround feeding, ants surrounded and fed along the edge of the sucrose droplet; (3) stacked feeding, ants stacked and fed along the edge of the sucrose droplet; (4) droplet-break feeding, ants broke the liquid droplet and sucked sucrose water that spread on surface of the substance or soil particles previously transported by ants, and (5) cover feeding, whole surface of the sucrose droplet was covered by layers of feeding ants...
December 28, 2016: Insect Science
https://www.readbyqxmd.com/read/27864050/ancestry-trumps-experience-transgenerational-but-not-early-life-stress-affects-the-adult-physiological-stress-response
#16
Gail L McCormick, Travis R Robbins, Sonia A Cavigelli, Tracy Langkilde
Exposure to stressors can affect an organism's physiology and behavior as well as that of its descendants (e.g. through maternal effects, epigenetics, and/or selection). We examined the relative influence of early life vs. transgenerational stress exposure on adult stress physiology in a species that has populations with and without ancestral exposure to an invasive predator. We raised offspring of eastern fence lizards (Sceloporus undulatus) from sites historically invaded (high stress) or uninvaded (low stress) by predatory fire ants (Solenopsis invicta) and determined how this different transgenerational exposure to stress interacted with the effects of early life stress exposure to influence the physiological stress response in adulthood...
January 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/27819800/high-efficiency-upconversion-nanophosphors-for-high-contrast-bioimaging
#17
Masfer H Alkahtani, Fahad S Alghannam, Carlos Sanchez, Carmen L Gomes, Hong Liang, Philip R Hemmer
Upconversion nanoparticles (UCNPs) are of interest because they allow suppression of tissue autofluorescence and are therefore visible deep inside biological tissue. Compared to upconversion dyes, UCNPs have a lower pump intensity threshold, better photostability, and less toxicity. Recently, YVO4: Er(+3), Yb(+3) nanoparticles were shown to exhibit strong up-conversion luminescence with a relatively low 10 kW cm(-2) excitation intensity even in water, which makes them excellent bio-imaging candidates. Herein, we investigate their use as internal probes in insects by injecting YVO4 : Er(+3), Yb(+3) nanoparticles into fire ants as a biological model, and obtain 2D optical images with 980 nm illumination...
December 2, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27774769/developmental-dna-methyltransferase-expression-in-the-fire-ant-solenopsis-invicta
#18
Sasha Kay, Daniel Skowronski, Brendan G Hunt
DNA methylation is accomplished in animals by two classes of enzymes known as DNA methyltransferases, DNMT3 and DNMT1, which perform de novo methylation and maintenance methylation, respectively. Several studies of hymenopteran eusocial insects suggest that DNA methylation is capable of influencing developmental plasticity. However, fundamental questions remain about the patterning of DNA methylation during the course of insect development. In this study, we performed quantitative real-time PCR (qPCR) on transcripts from the single-copy orthologs of DNMT1 and DNMT3 in the red imported fire ant, Solenopsis invicta...
October 24, 2016: Insect Science
https://www.readbyqxmd.com/read/27765943/tissue-developmental-and-caste-specific-expression-of-odorant-binding-proteins-in-a-eusocial-insect-the-red-imported-fire-ant-solenopsis-invicta
#19
Wei Zhang, Arun Wanchoo, Almudena Ortiz-Urquiza, Yuxian Xia, Nemat O Keyhani
Insects interact with the surrounding environment via chemoreception, and in social insects such as ants, chemoreception functions to mediate diverse behaviors including food acquisition, self/non-self recognition, and intraspecific communication. The invasive red imported fire ant, Solenopsis invicta, has spread worldwide, displaying a remarkable environmental adaptability. Odorant binding proteins (OBPs) are chemical compound carriers, involved in diverse physiological processes including odor detection and chemical transport...
October 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27687959/effect-of-irradiation-on-queen-survivorship-and-reproduction-in-the-invasive-fire-ant-solenopsis-invicta-hymenoptera-formicidae-and-a-proposed-phytosanitary-irradiation-treatment-for-ants
#20
Peter A Follett, Sol Porcel, Luis A Calcaterra
We studied radiation tolerance in queens of the red imported fire ant Solenopsis invicta Buren (Hymenoptera: Formicidae) to identify a dose that prevents reproduction. Virgin or fertile queens were collected from Santa Fe and Formosa provinces in Argentina and reared in the laboratory in microcolonies. Virgin queens were irradiated at 0 (control), 70, 90, 120, or 150 Gy, and fertile queens were irradiated at 0, 60, 125, and 190 Gy, and then followed for 11 wk in the microcolonies to evaluate survival and reproduction...
December 1, 2016: Journal of Economic Entomology
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