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https://www.readbyqxmd.com/read/28712285/freeze-thaw-sample-preparation-method-improves-the-detection-of-volatile-compounds-in-insects-using-headspace-solid-phase-microextraction-hs-spme
#1
Jian Chen
Headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS) is commonly used in analyzing insect volatiles. In order to improve the detection of volatiles in insects, a freeze-thaw method was applied to insect samples before the HS-SPME-GC-MS analysis. Insect samples were first frozen at -80 ⁰C for 10 min and then thawed at 25 ⁰C for 5 min before SPME extraction was performed. The freeze-thaw method clearly improved the detection of volatile compounds for all six tested insect species, including red imported fire ants, Solenopsis invicta Buren, black imported fire ants, Solenopsis richteri Forel, little black ants, Monomorium minimum (Buckley), pharaoh ants, Monomorium pharaonis (Linnaeus); eastern subterranean termites, Reticulitermes flavipes (Kollar); and spotted lady beetles, Coleomegilla maculate De Geer...
July 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28710832/new-species-of-spirotrichonympha-from-reticulitermes-and-the-relationships-among-genera-in-spirotrichonymphea-parabasalia
#2
Gillian H Gile, Erick R James, Vera Tai, James T Harper, Trevor L Merrell, Vittorio Boscaro, Filip Husník, Rudolf H Scheffrahn, Patrick J Keeling
Spirotrichonymphea is a class of hypermastigote parabasalids defined by their spiral rows of many flagella. They are obligate hindgut symbionts of lower termites. Despite more than 100 years of morphological and ultrastructural study, the group remains poorly characterised by molecular data and the phylogenetic positions and taxonomic validity of most genera remain in question. The genus Spirotrichonympha has been reported to inhabit several termite genera, including Reticulitermes, Coptotermes, and Hodotermopsis...
July 15, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28704553/screening-and-characterizing-of-xylanolytic-and-xylose-fermenting-yeasts-isolated-from-the-wood-feeding-termite-reticulitermes-chinensis
#3
Sameh Samir Ali, Jian Wu, Rongrong Xie, Feng Zhou, Jianzhong Sun, Miao Huang
The effective fermentation of xylose remains an intractable challenge in bioethanol industry. The relevant xylanase enzyme is also in a high demand from industry for several biotechnological applications that inevitably in recent times led to many efforts for screening some novel microorganisms for better xylanase production and fermentation performance. Recently, it seems that wood-feeding termites can truly be considered as highly efficient natural bioreactors. The highly specialized gut systems of such insects are not yet fully realized, particularly, in xylose fermentation and xylanase production to advance industrial bioethanol technology as well as industrial applications of xylanases...
2017: PloS One
https://www.readbyqxmd.com/read/28700595/origin-of-mounds-in-the-pantanal-wetlands-an-integrated-approach-between-geomorphology-pedogenesis-ecology-and-soil-micromorphology
#4
Jairo Calderari de Oliveira Junior, Raphael Moreira Beirigo, Mariane Chiapini, Alexandre Ferreira do Nascimento, Eduardo Guimarães Couto, Pablo Vidal-Torrado
Vegetated mounds are an important geomorphological feature of the Pantanal, where the influence of floods dictates not only hydropedological processes, but also the distribution and ecology of the flora and fauna. This work aimed to identify factors and processes that influence the formation and spatial distribution of the mounds, which are commonly associated with termite activity. In order to characterize pedological processes, macro and micro morphological descriptions, satellite image interpretation, dating of the sandy sedimentary material using OSL and carbon dating using 14C AMS were carried out...
2017: PloS One
https://www.readbyqxmd.com/read/28682523/exclusive-gut-flagellates-of-serritermitidae-suggest-a-major-transfaunation-event-in-lower-termites-description-of-heliconympha-glossotermitis-gen-nov-spec-nov
#5
Renate Radek, Katja Meuser, Jürgen F H Strassert, Oguzhan Arslan, Anika Teßmer, Jan Šobotník, David Sillam-Dussès, Ricardo A Nink, Andreas Brune
The guts of lower termites are inhabited by host-specific consortia of cellulose-digesting flagellate protists. In this first investigation of the symbionts of the family Serritermitidae, we found that Glossotermes oculatus and Serritermes serrifer each harbor similar parabasalid morphotypes: large Pseudotrichonympha-like cells, medium-sized Leptospironympha-like cells with spiraled bands of flagella, and small Hexamastix-like cells; oxymonadid flagellates were absent. Despite their morphological resemblance to Pseudotrichonympha and Leptospironympha, a SSU rRNA-based phylogenetic analysis identified the two larger, trichonymphid flagellates as deep-branching sister groups of Teranymphidae, with Leptospironympha sp...
July 6, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28680035/building-mud-castles-a-perspective-from-brick-laying-termites
#6
Nikita Zachariah, Aritra Das, Tejas G Murthy, Renee M Borges
Animal constructions such as termite mounds have received scrutiny by architects, structural engineers, soil scientists and behavioural ecologists but their basic building blocks remain uncharacterized and the criteria used for material selection unexplored. By conducting controlled experiments on Odontotermes obesus termites, we characterize the building blocks of termite mounds and determine the key elements defining material choice and usage by these accomplished engineers. Using biocement and a self-organized process, termites fabricate, transport and assemble spherical unitary structures called boluses that have a bimodal size distribution, achieving an optimal packing solution for mound construction...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28677262/high-resolution-phylogenetic-analysis-of-endomicrobia-reveals-multiple-acquisitions-of-endosymbiotic-lineages-by-termite-gut-flagellates
#7
Aram Mikaelyan, Claire L Thompson, Katja Meuser, Hao Zheng, Pinki Rani, Rudy Plarre, Andreas Brune
Bacteria of the class Endomicrobia form a deep-branching clade in the Elusimicrobia phylum. They are found almost exclusively in the intestinal tract of animals and are particularly abundant in many termites, where they reside as intracellular symbionts in the cellulolytic gut flagellates. Although small populations of putatively free-living lineages have been detected in faunated and flagellate-free hosts, the evolutionary origin of the endosymbionts is obscured by the limited amount of phylogenetic information provided by the 16S rRNA gene fragment amplified with Endomicrobia-specific primers...
July 5, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/28676938/the-first-report-of-gynandromorphy-in-termites-isoptera-kalotermitidae-neotermes-koshunensis
#8
Yasushi Miyaguni, Tomonari Nozaki, Toshihisa Yashiro
This is the first report of gynandromorphy in Isoptera. An Asian dry-wood termite, Neotermes koshunensis (Shiraki) [Kalotermitidae], possessing both male and female phenotypic characteristics, was found on Okinawa Island, Japan. This deformed individual showed morphological and anatomical hermaphroditism in the abdomen. The right side of the seventh sternite was the female form and contained an ovary, while the left side was the male form and contained a testis. Genotypic analysis revealed that this individual was a genotypic bilateral chimera...
August 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/28646115/genome-analysis-of-endomicrobium-proavitum-suggests-loss-and-gain-of-relevant-functions-during-the-evolution-of-intracellular-symbionts
#9
Hao Zheng, Carsten Dietrich, Andreas Brune
Bacterial endosymbionts of eukaryotes show progressive genome erosion, but detailed investigations of the evolutionary processes involved in the transition to an intracellular lifestyle are generally hampered by the lack of extant free-living lineages. Here, we characterize the genome of the recently isolated, free-living Endomicrobium proavitum, the second member of the Elusimicrobia phylum brought into pure culture, and compare it to the closely related "Candidatus Endomicrobium trichonymphae" strain Rs-D17, a previously described but uncultured endosymbiont of termite gut flagellates...
June 23, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28621823/raw-material-procurement-for-termite-fishing-tools-by-wild-chimpanzees-in-the-issa-valley-western-tanzania
#10
Katarina Almeida-Warren, Volker Sommer, Alex K Piel, Alejandra Pascual-Garrido
OBJECTIVES: Chimpanzee termite fishing has been studied for decades, yet the selective processes preceding the manufacture of fishing tools remain largely unexplored. We investigate raw material selection and potential evidence of forward planning in the chimpanzees of Issa valley, western Tanzania. MATERIALS AND METHODS: Using traditional archaeological methods, we surveyed the location of plants from where chimpanzees sourced raw material to manufacture termite fishing tools, relative to targeted mounds...
June 16, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28615497/excavation-and-aggregation-as-organizing-factors-in-de-novo-construction-by-mound-building-termites
#11
Ben Green, Paul Bardunias, J Scott Turner, Radhika Nagpal, Justin Werfel
Termites construct complex mounds that are orders of magnitude larger than any individual and fulfil a variety of functional roles. Yet the processes through which these mounds are built, and by which the insects organize their efforts, remain poorly understood. The traditional understanding focuses on stigmergy, a form of indirect communication in which actions that change the environment provide cues that influence future work. Termite construction has long been thought to be organized via a putative 'cement pheromone': a chemical added to deposited soil that stimulates further deposition in the same area, thus creating a positive feedback loop whereby coherent structures are built up...
June 14, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28610093/-i-aplectana-i-i-nordestina-i-n-sp-nematoda-cosmocercidae-parasitizing-i-leposternon-polystegum-i-squamata-amphisbaenidae-from-northeastern-brazil
#12
Darciane Maria DE Amorim, Lidiane Aparecida Firmino DA Silva, Drausio Honorio Morais, Reinaldo José DA Silva, Robson Waldemar Ávila
There are currently 760 reptile species known in Brazil, from which about 70 are amphisbaenians with 25 species recorded in the Brazilian northeast (Vanzolini 2002; Gomes & Maciel 2012; Costa & Bérnils, 2014; Roberto et al., 2014). Leposternon polystegum Duméril, is a widespread species distributed in the Amazon, Atlantic Forest, Cerrado, and Caatinga biomes (Porto et al., 2000; Ribeiro et al., 2011). The diet is composed mainly by ants, termites, and coleopteran larvae (Barros-Filho & Valverde, 1996; Gomes et al...
March 23, 2017: Zootaxa
https://www.readbyqxmd.com/read/28609906/a-new-genus-of-the-mite-family-scutacaridae-acari-heterostigmata-associated-with-trinervitermes-trinervoides-isoptera-termitidae-from-south-africa
#13
Alexander A Khaustov, Elizabeth A Hugo-Coetzee, Sergey G Ermilov
A new monotypic genus of scutacarid mites, Gerdalbertia gen. nov. (Acari: Pygmephoroidea: Scutacaridae), with type species G. elongata sp. nov. is described from nests of and phoretic on termites, Trinervitermes trinervoides (Sjostedt, 1911) (Isoptera: Termitidae), from South Africa. The taxonomic position of the new genus is discussed.
May 2, 2017: Zootaxa
https://www.readbyqxmd.com/read/28609463/uric-acid-an-important-antioxidant-contributing-to-survival-in-termites
#14
Eisuke Tasaki, Hiroki Sakurai, Masaru Nitao, Kenji Matsuura, Yoshihito Iuchi
Reactive oxygen species (ROS) are generated spontaneously in all organisms and cause oxidative damage to biomolecules when present in excess. Accumulated oxidative damage accelerates aging; enhanced antioxidant capacity may be a positive factor for longevity. Recently, numerous studies of aging and longevity have been performed using short-lived animals, however, longevity mechanisms remain unknown. Here we show that a termite Reticulitermes speratus that is thought to be long-lived eusocial insect than other solitary insects uses large quantities of uric acid as an antioxidant against ROS...
2017: PloS One
https://www.readbyqxmd.com/read/28608545/an-alternative-pathway-to-eusociality-exploring-the-molecular-and-functional-basis-of-fortress-defense
#15
Sarah P Lawson, Leah Sigle, Abigail Lind, Andrew W Legan, Jessica N Mezzanotte, Hans-Willi Honegger, Patrick Abbot
Some animals express a form of eusociality known as 'fortress defense', in which defense rather than brood care is the primary social act. Aphids are small plant-feeding insects, but like termites, some species express division of labor and castes of aggressive juvenile 'soldiers'. What is the functional basis of fortress defense eusociality in aphids? Previous work showed that the acquisition of venoms might be a key innovation in aphid social evolution. We show that the lethality of aphid soldiers derives in part from the induction of exaggerated immune responses in insects they attack...
June 13, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28608290/titanium-and-iron-titanium-oxide-nanoparticles-in-antennae-of-the-migratory-ant-pachycondyla-marginata-an-alternative-magnetic-sensor-for-magnetoreception
#16
Eliane Wajnberg, André Linhares Rossi, Darci Motta S Esquivel
The most accepted hypothesis of magnetoreception for social insects is the ferromagnetic hypothesis which assumes the presence of magnetic material as a sensor coupled to sensitive structures that transmit the geomagnetic field information to the nervous system. As magnetite is the most common magnetic material observed in living beings, it has been suggested as basic constituent of the magnetoreception system. Antennae and head have been pointed as possible magnetosensor organs in social insects as ants, bees and termites...
June 12, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28605564/foraging-distance-and-population-size-of-juvenile-colonies-of-the-formosan-subterranean-termite-isoptera-rhinotermitidae-in-laboratory-extended-arenas
#17
Nan-Yao Su, Weste Osbrink, Garima Kakkar, Aaron Mullins, Thomas Chouvenc
The relationship between colony size and foraging distance was examined in extended foraging arenas with juvenile colonies of the Formosan subterranean termite, Coptotermes formosanus Shiraki. Our results showed that as long as royal pairs are present, larger colonies foraged at longer distances, and the oldest workers distributed farther away from the central nest. The results agree with the scaling model that predicts a large foraging range for animals of larger body size. An analysis of published data from population survey studies and field trials of bait toxicants showed that field colonies of the eastern subterranean termite, Reticulitermes flavipes (Kollar), follow the scaling model, while C...
June 9, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28587241/termite-species-distribution-and-flight-periods-on-oahu-hawaii
#18
Reina L Tong, J Kenneth Grace, Makena Mason, Paul D Krushelnycky, Helen Spafford, Maria Aihara-Sasaki
Termites are economically-important structural pests, costing residents of Hawaii over $100 million annually. On Oahu, the last published termite swarming survey occurred from 1969 to 1971, and the last termite hand-collection survey occurred from 1998 to 2000. To contribute data on termite occurrences on Oahu, a light-trap survey took place from February 2011 to September 2012, and a hand-collection survey occurred from September to November 2012. Formosan subterranean termite, Coptotermes formosanus Shiraki, swarming was compared over the duration of the study, finding peak swarming in May 2011...
June 5, 2017: Insects
https://www.readbyqxmd.com/read/28573450/cloning-production-and-characterization-of-a-glycoside-hydrolase-family-7-enzyme-from-the-gut-microbiota-of-the-termite-coptotermes-curvignathus
#19
James Sy-Keen Woon, Patricia Jie Hung King, Mukram Mohamed Mackeen, Nor Muhammad Mahadi, Wan Mohd Khairulikhsan Wan Seman, William J Broughton, Abdul Munir Abdul Murad, Farah Diba Abu Bakar
Coptotermes curvignathus is a termite that, owing to its ability to digest living trees, serves as a gold mine for robust industrial enzymes. This unique characteristic reflects the presence of very efficient hydrolytic enzyme systems including cellulases. Transcriptomic analyses of the gut of C. curvignathus revealed that carbohydrate-active enzymes (CAZy) were encoded by 3254 transcripts and that included 69 transcripts encoding glycoside hydrolase family 7 (GHF7) enzymes. Since GHF7 enzymes are useful to the biomass conversion industry, a gene encoding for a GHF7 enzyme (Gh1254) was synthesized, sub-cloned and expressed in the methylotrophic yeast Pichia pastoris...
June 1, 2017: Molecular Biotechnology
https://www.readbyqxmd.com/read/28567621/cost-effective-screening-and-isolation-of-xylano-cellulolytic-positive-microbes-from-termite-gut-and-termitarium
#20
Libin Mathew Varghese, Sharad Agrawal, Divya Sharma, Rishi Pal Mandhan, Ritu Mahajan
In this study, screening and isolation of xylano-cellulolytic enzymes producing positive microbes from termitarium and termite gut microbiome were done using cost-effective agricultural wastes. The enrichment of xylano-cellulolytic microbes was done in three steps using wheat bran and waste paper. The qualitative screening of xylanase and cellulase producing micro-organisms was done on nutrient agar plates containing wheat bran and waste paper, respectively. Xylanase and cellulase positive colonies were analysed by observing the zone of substrate (wheat bran and waste paper) hydrolysis around the colonies...
June 2017: 3 Biotech
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