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http://hdl.handle.net/2239/32622
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| Title: | Juvenile hormone III titers and regulation of soldier caste in Coptotermes formosanus (Isoptera: Rhinotermitidae) |
| Authors: | Park, Y.I.
Raina, A.K.
USDA, ARS |
| Keywords: | pre-soldier termites
soldier formation
soldier presence
Coptotermes formosanus
subterranean termites
soldier insects
worker insects
caste determination
juvenile hormones
hormone secretion
hormonal regulation
methoprene
social insects |
| Issue Date: | 17-Oct-2007 |
| Description: | Juvenile hormone (JH) is an important growth hormone in insects that has also been implicated in caste determination in termites. Gas chromatography¡mass spectrometry was used to establish that the JH in the Formosan subterranean termite, Coptotermes formosanus Shiraki, is JH III. JH III titers were measured in workers, pre-soldiers, and soldiers from samples collected from the field. The average titers of JH III in workers and soldiers were about 13 and 25 pg mg-1, respectively. However, pre-soldiers contained a significantly higher amount, 596 pg mg-1. As expected, treatment of workers with a JH-analogue, methoprene, triggered rapid formation of pre-soldiers. However, these pre-soldiers had a very low JH III titer (62 pg mg-1). It appears that the application of JHA, while inducing pre-soldier formation, does not increase the endogenous JH III titer. The titer, however, increased as the pre-soldiers aged and before transforming into soldiers. |
| URI: | http://seekspace.resip.ac.cn/handle/2239/32622 |
| Other Identifiers: | http://seekspace.resip.ac.cn/handle/10113/3202 |
| Appears in Collections: | 网络开放学术资源
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