Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 9/15/2003
Publication Date: 12/10/2004
Citation: Denlinger, D.L., Yocum, G.D., Rinehart, J.P. 2004. Hormonal control of diapause. In: Gilbert, L.I., Iatrou, K., Gill, S.S., editors. Comprehensive Molecular Insect Science. Amsterdam: Elsevier. Vol. 7, p. 615-650.
Technical Abstract: This chapter provides an overview of the hormonal and molecular regulation of insect diapause. For an insect species to survive in any given geographic location, its life cycle must be tightly synchronized to all biotic and abiotic factors required for development and reproduction. Insects must also be able to survive predictable recurring periods of environmental stress, such as winter for temperate zone insects. Diapause is the chief physiological mechanism by which insects meet these two requirements for survival. Because of its central role enabling insect pests to survive and reproduce in a given area, an understanding of the mechanism of diapause is critical in the management of any agroecosystem. Topics covered include the hormonal basis of embryonic, larval, pupal and adult diapause, the role of the brain as photoreceptor and programmable center, clock genes, cyptochromes, opsins and diapause-associated gene expression. In the last section the parallels between insect diapause and other organisms' dormancy are explored.