Juvenile hormone delays the initiation of rectal sac distention by disrupting ecdysteroid action in the silkworm, Bombyx mori
スポンサーリンク
概要
- 論文の詳細を見る
Holometabolous insects develop without feeding and excreting during the pupal period and thus require repository organs for metabolic waste, or meconium. The rectal sac is an organ for storing meconium during pupal-adult development of holometabolous insects. Although the rectal sac has an essential function, hormonal and developmental regulation of waste-accumulation and the consequences of rectal sac distention are still unknown. In the silkworm, Bombyx mori, the rectal sac distends with meconium in the middle pupal period under the regulation of ecdysteroid. Here, we show that juvenile hormone analog (JHA) delayed rectal sac distention and disturbed adult emergence. Distention was not restored completely by an injection of 20-hydroxyecdysone (20E) into pupae applied with JHA, suggesting that JHA suppresses 20E action and delays the timing of ecdysteroid elevation. Thus the "status quo" action of JHA may function in two different ways during pupal-adult development. © 2010 Elsevier Inc.
論文 | ランダム
- 28p-ZD-4 RbBr_I_:Tlの輝尽特性
- 単眼観察時の近距離に位置する視対象の奥行き知覚(人間の視覚・聴覚情報)
- 手掌面の細菌に関する研究
- PF37 キャンプにおける児童・生徒の達成動機・自尊感情の変化とプログラムの検討 : 不登校児と登校児の比較を通して
- PE76 幼児の道徳性の発達を意図したVLF教育プログラム