Population dependent effects of photoperiod on diapause related physiological traits in an invasive beetle (Leptinotarsa decemlineata)

Lehmann, Philipp; Lyytinen, Anne; Sinisalo, Tuula; Lindström, Leena

doi:10.1016/j.jinsphys.2012.06.003

Cited by 32 publications

(61 citation statements)

References 166 publications

(273 reference statements)

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“…In the Colorado potato beetle Leptinotarsa decemlineata , the abdominal water content decreased during the diapause preparation period (Lehmann et al . ). In the adult mountain pine beetle Dendroctonus ponderosae , monthly mean dry mass displayed a linear decline; however, water content increased significantly throughout the winter progression (Lester & Irwin ).…”

Section: Discussionmentioning

confidence: 97%

Water and carbohydrate levels at different developmental stages and dynamics in hibernating pupae of Pieris melete (Lepidoptera: Pieridae)

Xiao

Chen

et al. 2015

Entomological Research

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For insight into the physiological indicators of diapause in Pieris melete, water and carbohydrate (glycogen and trehalose) levels were measured under both natural and laboratory conditions. The highest water content (3.71-3.79 mg/mg dry weight) was found in larvae and developing pupae, which was substantially higher than in diapausing pupae (2.59 mg/mg dry weight). Water content was almost stable during diapause, except for individuals approaching diapause termination (3.43-3.58 mg/mg dry weight). The total carbohydrate level was significantly higher in pre-pupae (47.41 μg/mg) compared to larvae (22.80 μg/mg) and developing pupae (21.48 μg/mg). The highest level of trehalose was detected in winter diapausing pupae, and no trehalose was found in larvae or developing pupae. Levels of glycogen were highest in pre-pupae and lowest in diapausing pupae. Levels of total carbohydrate decreased as diapause proceeded, and no significant changes were found in trehalose levels for diapausing pupae under natural conditions or treated for 60-90 days at 5°C. Pupae treated at 20°C for 60-90 days had significantly lower levels of trehalose than those treated for 30 days. Glycogen content was relatively stable at 5°C, but increased after treatment under natural conditions and 20°C for more than 60 days. These results suggest that the dynamics of water and carbohydrate levels are potential physiological diapause indicators, which show metabolic differences between trehalose and glycogen during diapause development.

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Section: Discussionmentioning

confidence: 97%

Water and carbohydrate levels at different developmental stages and dynamics in hibernating pupae of Pieris melete (Lepidoptera: Pieridae)

Xiao

Chen

et al. 2015

Entomological Research

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“…Energy reserves of the beetle are situated in the fat body of the abdomen, and over 80% of the lipids are triacylglycerides, storage fats (Lehmann et al. ). Beetles were first dried at 55°C for 72 h after which the dry weight was measured.…”

Section: Methodsmentioning

confidence: 99%

Sublethal effects of deltamethrin exposure of parental generations on physiological traits and overwintering in Leptinotarsa decemlineata

Piiroinen

Boman²,

Lyytinen

et al. 2013

J Applied Entomology

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Although the evolution of insecticide resistance has received a lot of attention, less is known about sublethal effects of insecticide stress experienced by the preceding generations on the performance of pest populations. We investigated whether three generations of parental exposure to a deltamethrin insecticide influences physiological traits and overwintering success of offspring in Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae). Beetles descending from insecticide‐exposed parents had lower adult body mass but higher relative lipid content and resting metabolic rate than those descending from non‐insecticide‐exposed parents. Also, a higher proportion of beetles descending from insecticide‐exposed parents than from control parents overwintered on the soil surface, which was associated with very low overwintering survival. When burrowed into the soil for overwintering, both groups had similar probability to survive the overwintering period. Parental insecticide exposure can reduce overall overwintering survival in the next generation by disturbing overwintering behaviour. Although beetles descending from insecticide‐exposed parents were small, the overwintering conditions seem to select for high lipid content, which could override the negative effects of small weight, and possibly improve fitness in the following growing season. Thus, insecticide application may have unintended consequences, which should be considered in pest management.

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“…Many previous studies have shown population differences in elevation and slope of reaction norms (Gotthard, 2001;De Block & Stoks, 2003, 2004De Block et al, 2008a,b;Conover et al, 2009;Lehmann et al, 2012;Śniegula et al, 2012a,b). However, in order to predict evolutionary responses to environmental changes one needs to identify evolutionary potential in terms of genetic variation of fitness-related traits and of the trait's plasticity (Bradshaw & Holzapfel, 2006;Shama et al, 2011).…”

Section: Introductionmentioning

confidence: 95%

Photoperiod and variation in life history traits in core and peripheral populations in the damselfly Lestes sponsa

Śniegula

Drobniak

Gołąb

et al. 2013

Ecological Entomology

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In order to predict evolutionary responses to environmental changes one needs to identify the evolutionary potential in terms of genetic variation of traits and of the traits' plasticity. We studied genetic variance in life history traits and their reaction norms in response to manipulated photoperiods in central, northern, and northernmost peripheral populations of the damselfly Lestes sponsa (Hansemann). After the central‐marginal hypothesis, it is predicted that central populations will express the highest genetic variance. Northern and northernmost populations showed the highest development and growth rates. All populations expressed shorter development and accelerated growth when raised in a northern compared with a central latitude photoperiod. The slopes of reaction norms differed between regions resulting in a region‐by‐photoperiod interaction. There was genetic variation in development time; however, it did not differ across regions. There was no genetic variation in growth rate or in the plasticity of development time and growth rate to photoperiod. Results did not support the central‐marginal hypothesis. However, evidence was found that the development time has the potential to evolve at similar rates across study regions. In contrast, the growth rate seems to be genetically constrained for further evolution, probably because of a strong past directional selection on this trait. The presence of low genetic variation in the slope of the reaction norms could be a result of stabilising selection imposed by seasonality.

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Population dependent effects of photoperiod on diapause related physiological traits in an invasive beetle (Leptinotarsa decemlineata)

Cited by 32 publications

References 166 publications

Water and carbohydrate levels at different developmental stages and dynamics in hibernating pupae of Pieris melete (Lepidoptera: Pieridae)

Water and carbohydrate levels at different developmental stages and dynamics in hibernating pupae of Pieris melete (Lepidoptera: Pieridae)

Sublethal effects of deltamethrin exposure of parental generations on physiological traits and overwintering in Leptinotarsa decemlineata

Photoperiod and variation in life history traits in core and peripheral populations in the damselfly Lestes sponsa

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