Molecular cloning and expression pattern of the juvenile hormone epoxide hydrolase gene from the giant freshwater prawn Macrobrachium rosenbergii during larval development and the moult cycle

Abstract

Juvenile hormones (JHs) constitute a family of sesquiterpenoids with versatile roles in the regulation of moult, development, metamorphosis, reproductive maturation and polyphenisms in arthropods (Riddiford et al., 2010;Truman & Riddiford, 2007).JHs are well known to prevent early metamorphosis. In particular, the presence of JH during pre-ultimate juvenile stages determines that the next stage will be a juvenile, and disappearance of JH triggers metamorphosis (Jindra et al., 2013). Therefore, the accurate regulation of juvenile hormone titres is crucial for insect moulting and metamorphosis. Several forms of JH have been identified in insects, with JH III being the most common (Bergot et al., 1981).

Full-Length Transcriptome Sequencing and Comparative Transcriptomic Analysis Provide Insights Into the Ovarian Maturation of Exopalaemon carinicauda

“…In crustaceans, the JHEH-like genes have been identified in Daphnia magna (Toyota et al, 2014), M. rosenbergii (Chen et al, 2021) and Penaeus vannamei (Liu et al, 2022). JHEH-like is indispensable for the regulation of larval development and ecdysteroidogenesis in M. rosenbergii (Chen et al, 2021) and plays an essential role in shrimp survival during bacterial infection in P. vannamei (Liu et al, 2022). In this study, the expression of JHEH-like was significantly highest in the major growth stage among the five ovarian developmental stages in E. carinicauda.…”

“…Knocking down JHEH in Colaphellus bowringi elevated JH signaling and increased expressions of vitellogenin genes (Guo et al, 2019b). In crustaceans, the JHEH-like genes have been identified in Daphnia magna (Toyota et al, 2014), M. rosenbergii (Chen et al, 2021) and Penaeus vannamei (Liu et al, 2022). JHEH-like is indispensable for the regulation of larval development and ecdysteroidogenesis in M. rosenbergii (Chen et al, 2021) and plays an essential role in shrimp survival during bacterial infection in P. vannamei (Liu et al, 2022).…”