alexa Methyl farnesoate (MF) and its role in crustacean reproduction and development
Geology & Earth Science

Geology & Earth Science

Journal of Oceanography and Marine Research

Author(s): Matthew Landau, Hans Laufer, Matthew Landau, David A Schooley

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Studies with Libinia emarginata suggest that methyl farnesoate (MF), a product of the mandibular organs (MOs), may be a crustacean juvenile hormone. In order to better understand the significance of this compound in crustacean physiology, we first investigated the presence of MF in other decapods. MF was synthesized and secreted by MOs from all species tested. However, large differences in the level of MF secretion were observed between species and also between individuals of a species. For example, the level of secretion by MOs from L. emarginata was 100-fold greater than that observed in MOs from Homarus americanus. Analysis of hemolymph from these two species by GC-MS indicated comparable differences in the amount of MF present. Differences in the level of MF secretion by MOs from individuals of a species appear to reflect the physiological roles of this compound. For example, a close relationship was seen between MF secretion and gametogenesis in females of L. emarginata. Finally, treatment of lobster larvae with seawater containing MF caused a small but significant delay in their metamorphosis when compared with untreated larvae. These data suggest that MF affects reproduction in a manner similar to the effects of JH on insects, and may also have effects on the development of crustacean larvae. Taken together, these data support the classification of MF as a crustacean JH.

This article was published in Insect Biochemistry and referenced in Journal of Oceanography and Marine Research

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