Diapause, signal and molecular characteristics of overwintering Chilo suppressalis (Insecta: Lepidoptera: Pyralidae)

Lu, Ming‐Xing; Cao, Shuai; Du, Yu‐Zhou; Liu, Zhongxian; Liu, Pingyang; Li, Jianyong

doi:10.1038/srep03211

Cited by 50 publications

(21 citation statements)

References 49 publications

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“…Accumulated energy reserves are essential to allow insects to withstand these various kinds of stress17. Hsps can increase the ability of insects to withstand environmental stress, including extremes of temperature, crowding, starvation, and hypoxia/anoxia, and are generally differentially expressed during diapause18383940. We speculated, therefore, that energy reserves, especially stored lipids, may promote Hsps expression during diapause.…”

Section: Discussionmentioning

confidence: 99%

Fatty acid synthase 2 contributes to diapause preparation in a beetle by regulating lipid accumulation and stress tolerance genes expression

Tan

Liu

Zhu

et al. 2017

Sci Rep

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Diapause, also known as dormancy, is a state of arrested development that allows insects to survive unfavorable environmental conditions. Diapause-destined insects store large amounts of fat when preparing for diapause. However, the extent to which these accumulated fat reserves influence diapause remains unclear. To address this question, we investigated the function of fatty acid synthase (FAS), which plays a central role in lipid synthesis, in stress tolerance, the duration of diapause preparation, and whether insects enter diapause or not. In diapause-destined adult female cabbage beetles, Colaphellus bowringi, FAS2 was more highly expressed than FAS1 at the peak stage of diapause preparation. FAS2 knockdown suppressed lipid accumulation and subsequently affected stress tolerance genes expression and water content. However, silencing FAS2 had no significant effects on the duration of diapause preparation or the incidence of diapause. FAS2 transcription was suppressed by juvenile hormone (JH) and the JH receptor methoprene-tolerant (Met). These results suggest that the absence of JH-Met induces FAS2 expression, thereby promoting lipid storage in diapause-destined female beetles. These results demonstrate that fat reserves regulate stress tolerance genes expression and water content, but have no significant effect on the duration of diapause preparation or the incidence of diapause.

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Section: Discussionmentioning

confidence: 99%

Fatty acid synthase 2 contributes to diapause preparation in a beetle by regulating lipid accumulation and stress tolerance genes expression

Tan

Liu

Zhu

et al. 2017

Sci Rep

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“…The maintenance of diapause itself is a physiologically dynamic and it changes over time in response to internal stimuli and environment [14].…”

Section: Post-diapause Phasementioning

confidence: 99%

Insect Diapause: A Review

Gill¹,

Goyal²,

Chahil³

2017

JAST-A

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Diapause is defined as a period of suspended development in insects and other invertebrates during unfavorable environmental conditions. Diapause is commonly confused with term "quiescence" as both are dormant development stages. Here this paper aimed to review the research work done on different aspects of diapause. Attempt was made to explain definitions of diapause, incidence, stages and termination of diapause, genetic control, factors affecting diapauses, including temperature, photoperiod, moisture and food, etc..

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“…Diapause is a dynamic developmental arrest, accompanied with metabolic depression and enhanced stress tolerance12. It also increases their chance of mating by synchronizing the growth rates of population which ultimately plays a vital role in insect survival23. There are two kinds of diapause (obligatory diapause and facultative diapause) and three type of eco-physiological phases including pre-diapause, diapause and post-diapause45.…”

mentioning

confidence: 99%

Pupal diapause termination in Bactrocera minax: an insight on 20-hydroxyecdysone induced phenotypic and genotypic expressions

Chen

Dong

Wang

et al. 2016

Sci Rep

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The Chinese citrus fruit fly, Bactrocera minax, is an economically important pest of citrus. It exhibits pupal diapause from November to May to combat harsh environmental conditions. Such a long pupal diapause is a barrier for laboratory rearing and development of control strategies against this pest. In the present study, 20-hydroxyecdysone (20E) was used to break pupal diapause of B. minax by topical application. After diapause termination by 20E treated, the pupal ontogenetic processes were observed along the temporal trajectory. The pupal response time to 20E was estimated by detecting the relative expression of 20E responsive genes at different times after 20E-treatment. Results revealed that 20E could effectively terminate the pupal diapause in a dose-dependent manner and significantly shorten the time for 50% adult emergence (Et50). 20E response genes, including ecr, broad and foxo, were up-regulated within 72h, indicating these genes are involved in pupal metamorphosis and diapause termination processes. Morphological changes showed the pupal metamorphosis began ~7 days after 20E-treatment at 22 °C. This study does not only pave the way for artificial rearing in the laboratory through manipulating of pupal diapause termination, but also deepens our understanding of the underlying pupal diapause termination mechanism of B. minax.

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Diapause, signal and molecular characteristics of overwintering Chilo suppressalis (Insecta: Lepidoptera: Pyralidae)

Cited by 50 publications

References 49 publications

Fatty acid synthase 2 contributes to diapause preparation in a beetle by regulating lipid accumulation and stress tolerance genes expression

Fatty acid synthase 2 contributes to diapause preparation in a beetle by regulating lipid accumulation and stress tolerance genes expression

Insect Diapause: A Review

Pupal diapause termination in Bactrocera minax: an insight on 20-hydroxyecdysone induced phenotypic and genotypic expressions

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