Ecdysone

Ecdysone is a steroid hormone that controls molting in arthropods. It is also present in various other related phyla where it can play different roles. The name "ecdysone" comes from the Greek "ekdysis", meaning "to strip off".

Structure and Function

Ecdysone is a steroid that is secreted by the prothoracic gland, which is an endocrine gland in the insect thorax. The hormone is released into the hemolymph and binds to the ecdysone receptor, a nuclear receptor, thus initiating the molting process.

Role in Molting

In arthropods, ecdysone acts as the main hormone that regulates the process of molting. It is released in response to environmental cues, such as changes in temperature or day length, and triggers the degradation of the old exoskeleton and the formation of a new one.

Role in Other Phyla

In addition to its role in arthropods, ecdysone is also found in other phyla, including the nematodes and the chordates. In these organisms, it can have different functions, such as regulating development or reproduction.

Ecdysone and Pest Control

Because of its crucial role in insect development, ecdysone has been studied as a potential target for pest control. Synthetic ecdysone analogs have been developed that can disrupt the molting process in insects, thus killing them or preventing them from reaching maturity.

See Also

• Molting
• Arthropods
• Steroid hormone
• Prothoracic gland
• Ecdysone receptor

References

Ecdysone Resources
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