Metabolic responses of Glossina pallidipes (Diptera: Glossinidae) puparia exposed to oxygen and temperature variation: Implications for population dynamics and subterranean life

Basson, C. Helene; Terblanche, John S.

doi:10.1016/j.jinsphys.2010.07.010

Cited by 21 publications

(21 citation statements)

References 56 publications

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“…until adult emergence (Basson & Terblanche, 2010). Thus, in comparison to larvae that can detoxify and eliminate DEHP, pupae do not have the possibility to perform such kind of physiological processes.…”

Section: Discussion Environmental Contamination and Bioaccumulation Omentioning

confidence: 99%

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Effects of DEHP on post-embryonic development, nuclear receptor expression, metabolite and ecdysteroid concentrations of the moth Spodoptera littoralis

et al. 2019

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Di (2-ethylhexyl) phthalate (DEHP) is recognized in vertebrates as an Endocrine Disrupting Chemical (EDC). DEHP can alter steroid hormones production, development, reproduction and behavior in vertebrates. Only few studies investigated DEHP effects on insects. However, some recent studies on aquatic insects showed that DEHP could also act as an EDC by interfering with the signaling pathways of ecdysteroids, the main hormones involved in the control of insect postembryonic development and physiology. The aim of the study was to investigate (1) the fate of DEHP within a terrestrial insect species by exposing larvae to food containing a wide range of DEHP concentrations and (2) the effects of this chemical on their post-embryonic development and metamorphosis, by using a multi-level approach. DEHP was shown to be present both in larvae and resulting stages, with higher concentrations in chrysalises and adults than in larvae. DEHP concentrations also decreased at the end of the last larval instar, suggesting the metabolic transformation or excretion of this chemical during this time. Only the two highest DEHP doses induced higher insect mortality, whereas low and intermediate concentrations increased larval food consumption without affecting body weight. Metabolic profiles showed that in control insects, the last three days before metamorphosis correspond to a metabolic transition, but with time-dependent changes in treated insects. Interestingly, DEHP treatments also alter both hemolymphatic ecdysteroid titers and expression levels of ecdysteroid response genes. These results confirm that DEHP can alter insect post-embryonic development and metamorphosis, by interfering with ecdysteroid pathways.

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Section: Discussion Environmental Contamination and Bioaccumulation Omentioning

confidence: 99%

“…DEHP disrupt the molecular events that occur during the last larval stage (critical stage before the passage to chrysalis)? (4) Considering the known effects of the EDCs, does DEHP exposure induce effects at multiple levels (e.g. gene expression, metabolism, hormonal concentration) in S. littoralis?…”

Section: Accepted Manuscript M a mentioning

confidence: 99%

Effects of DEHP on post-embryonic development, nuclear receptor expression, metabolite and ecdysteroid concentrations of the moth Spodoptera littoralis

et al. 2019

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“…Furthermore, available water capacity is a component of the water and energy balances of terrestrial biosphere (Milly & Shmakin, 2002), and is required in ecological studies to establish the response of plant or animal species or communities to environmental conditions (Basson & Terblanche, 2010; Piedallu et al, 2011). The availability of soil moisture controls the rates of evaporation and transpiration, which in turn can have a major impact on climate.…”

Section: Introductionmentioning

confidence: 99%

Predicting and mapping soil available water capacity in Korea

Hong

Minasny

Han

et al. 2013

PeerJ

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The knowledge on the spatial distribution of soil available water capacity at a regional or national extent is essential, as soil water capacity is a component of the water and energy balances in the terrestrial ecosystem. It controls the evapotranspiration rate, and has a major impact on climate. This paper demonstrates a protocol for mapping soil available water capacity in South Korea at a fine scale using data available from surveys. The procedures combined digital soil mapping technology with the available soil map of 1:25,000. We used the modal profile data from the Taxonomical Classification of Korean Soils. The data consist of profile description along with physical and chemical analysis for the modal profiles of the 380 soil series. However not all soil samples have measured bulk density and water content at −10 and −1500 kPa. Thus they need to be predicted using pedotransfer functions. Furthermore, water content at −10 kPa was measured using ground samples. Thus a correction factor is derived to take into account the effect of bulk density. Results showed that Andisols has the highest mean water storage capacity, followed by Entisols and Inceptisols which have loamy texture. The lowest water retention is Entisols which are dominated by sandy materials. Profile available water capacity to a depth of 1 m was calculated and mapped for Korea. The western part of the country shows higher available water capacity than the eastern part which is mountainous and has shallower soils. The highest water storage capacity soils are the Ultisols and Alfisols (mean of 206 and 205 mm, respectively). Validation of the maps showed promising results. The map produced can be used as an indication of soil physical quality of Korean soils.

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“…Flow-through CO 2 -based respirometry was used to record VĊO 2 , with a similar experimental setup as described by Terblanche et al (2007). A HiBlow HP40 air pump was used to feed Manuscript to be reviewed cuvette, which was placed in a programmable water bath (Grant, GP200-R4), programmed using LABWISE software with increasing temperature of 0.25C min -1 (see Basson & Terblanche, 2010). The air leaving the cuvette then entered the analyser through another channel which recorded the difference in CO 2 concentration of the air before and after it flowed through the cuvette, at 1s intervals.…”

Section: Active Metabolic Rate Measurement (Amr)mentioning

confidence: 99%

Peer Review #3 of "The physiological consequences of varied heat exposure events in adult Myzus persicae: a single prolonged exposure compared to repeated shorter exposures (v0.2)"

2016

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Metabolic responses of Glossina pallidipes (Diptera: Glossinidae) puparia exposed to oxygen and temperature variation: Implications for population dynamics and subterranean life

Cited by 21 publications

References 56 publications

Effects of DEHP on post-embryonic development, nuclear receptor expression, metabolite and ecdysteroid concentrations of the moth Spodoptera littoralis

Effects of DEHP on post-embryonic development, nuclear receptor expression, metabolite and ecdysteroid concentrations of the moth Spodoptera littoralis

Predicting and mapping soil available water capacity in Korea

Peer Review #3 of "The physiological consequences of varied heat exposure events in adult Myzus persicae: a single prolonged exposure compared to repeated shorter exposures (v0.2)"

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