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The impact of thigmotaxis deprivation on the development of the German cockroach (Blattella germanica).

ABSTRACT: Thigmotaxis is required in small animals. In this study, we examined how the shelter angle affects the development of German cockroaches, Blattella germanica. Groups and individual cockroaches showed a strong preference for shelters with an angle of ≤40° after 15 min or 24 h in shelter-selection trials. For cockroaches that developed in 90/180-degree shelters, survival and fecundity were low, and the nymphal stage lasted longer. Post-molting transcriptomes of second- and sixth-instar nymphs were analyzed at 12 h and 2 days post-molting. Upregulation was observed in genes related to ATP metabolism and cellular amide metabolism. Chitin-based cuticle development and postembryonic development-related genes were downregulated. The stress responses of cockroaches that developed in shelters with angles of 90° were similar to those of gregarious cockroaches experiencing social isolation. For German cockroaches, environmental tactile stimuli are crucial to development and homeostasis.

SUBMITTER: Chen YR 

PROVIDER: S-EPMC9385682 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature

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The impact of thigmotaxis deprivation on the development of the German cockroach (<i>Blattella germanica</i>).

Chen Yun-Ru YR   Li De-Wei DW   Wang Hsin-Ping HP   Lin Shih-Shun SS   Yang En-Cheng EC  

iScience 20220720 8

Thigmotaxis is required in small animals. In this study, we examined how the shelter angle affects the development of German cockroaches, <i>Blattella germanica</i>. Groups and individual cockroaches showed a strong preference for shelters with an angle of ≤40° after 15 min or 24 h in shelter-selection trials. For cockroaches that developed in 90/180-degree shelters, survival and fecundity were low, and the nymphal stage lasted longer. Post-molting transcriptomes of second- and sixth-instar nymp  ...[more]

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