Photoperiod regulates growth of male accessory glands through juvenile hormone signaling in the linden bug, Pyrrhocoris apterus. (March 2016)

• Record Type: Journal Article
• Authors: Urbanová, Veronika; Bazalová, Olga; Vaněčková, Hanka; Dolezel, David
• Is Part Of: Insect biochemistry and molecular biology. Volume 70(2016:Mar.)
• Page Start: 184
• Page End: 190
• Publication Date: 2016-03
• Subjects: Diapause -- Methoprene-tolerant -- bHLH-PAS -- Circadian genes -- Locomotor activity -- Mating behavior; Insect biochemistry -- Periodicals; Insects -- Physiology -- Periodicals; Insects -- Molecular aspects -- Periodicals; Biochemistry -- Periodicals; Insectes -- Biochimie -- Périodiques; Insectes -- Composition -- Périodiques; Insectes -- Physiologie -- Périodiques; Insectes -- Aspect moléculaire -- Périodiques; Biochimie -- Périodiques; Biochemistry; Insect biochemistry; Insects -- Molecular aspects; Insects -- Physiology; Periodicals; 572.8157
• DOI: 10.1016/j.ibmb.2016.01.003
• Languages: English
• ISSNs: 0965-1748

Abstract

Abstract: Adult reproductive diapause is characterized by lower behavioral activity, ceased reproduction and absence of juvenile hormone (JH). The role of JH receptor Methoprene-tolerant (Met) in female reproduction is well established; however, its function in male reproductive development and behavior is unclear. In the bean bug, Riptortus pedestris, circadian genes are essential for mediating photoperiodically-dependent growth of the male accessory glands (MAGs). The present study explores the role of circadian genes and JH receptor in male diapause in the linden bug, Pyrrhocoris apterus . These data indicate that circadian factors Clock, Cycle and Cry2 are responsible for photoperiod measurement, whereas Met and its partner protein Taiman participate in JH reception. Surprisingly, knockdown of the JH receptor neither lowered locomotor activity nor reduced mating behavior of males. These data suggest existence of a parallel, JH-independent or JH-upstream photoperiodic regulation of reproductive behavior. Graphical abstract: Highlights: Male accessory glands (MAGs) of reproductive linden bugs, Pyrrhocoris apterus, are larger than those in diapause individuals. The growth of MAGs requires juvenile hormone (JH) and its receptor proteins Met and Tai. Met is not required for male mating behavior or fertility. Circadian genes are needed for the photoperiod-dependent switch from diapause to reproductive growth of MAGs and for mating. Neither JH nor its receptor Met are involved in regulating high behavioral activity characteristic of reproductive males.