Ultrabithorax regulates Leptinotarsa decemlineata wing development along with insulin and ecdysteroid signaling pathways.

IF 2.9 1区 农林科学 Q1 ENTOMOLOGY
An-Di Zhu, Zun-Zun Jia, Xiao-Wu Wang, Xin-Hua Ding, Tursun Ahmat, Jia-He Wu, Wen-Chao Guo, Kai-Yun Fu
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Abstract

Leptinotarsa decemlineata (Say) (Colorado potato beetle, CPB) is a notorious pest of potatoes. Its hardened forewings, known as elytra, protect the hindwings and the abdomen against enemies and chemical pesticides. Ubx plays a crucial role in differentiating insect wings, but the molecular mechanism remains unclear. Our research showed that Ubx is highly expressed in the T3 thoracic segment (T3) and appendages, while Ubx is absent in the forewings. RNA interference for Ubx resulted in the dorsal plate of the T3 being shifted toward the T2, hindwings were sheathed from the membranous in adults, and forewings were curling. The hindwing development-related genes downstream of Ubx, including LdDpp, LdIro, LdVg, LdWg, and LdASH, were significantly up-regulated in Ubx-inhibited insects compared with the control, by 2.40, 1.88, 1.81, 1.89, and 2.81 times, respectively. After feeding 20-hydrosyecdysone (20E), the forewing was flatter and more stretched than the control, leading to increased wing area, which indicates Ubx regulation is associated with the feedback of ecdysteroids. The expression levels of 3 ecdysteroid receptor genes EcR, EcRA, and EcRB were significantly lower in knocking down LdUbx insects than the control and was able to be recovered by 20E feeding, suggesting that ecdysteroid is associated with LdUbx-regulated wing development. Cosilencing LdUbx and LdAkt genes significantly inhibited the growth of forewings and hindwings, reducing the area of the wings. Together, our findings suggested that LdUbx regulates wing development along with ecdysteroid and insulin-like peptide signaling pathways, which provides a novel molecular mechanism of wing development and differentiation in insects.

超氧胸通过胰岛素和表皮激素信号通路调节瘦肉象翅膀发育。
科罗拉多马铃薯甲虫(Leptinotarsa decemlineata)是马铃薯的一种臭名昭著的害虫。它坚硬的前翅,被称为鞘翅,保护后翅和腹部免受敌人和化学杀虫剂的侵害。Ubx在昆虫翅膀的分化中起着至关重要的作用,但其分子机制尚不清楚。我们的研究表明,Ubx在T3胸段(T3)和附肢中高表达,而在前翼中不表达。RNA对Ubx的干扰导致成虫T3的背板向T2移位,后翅脱离膜层,前翅卷曲。Ubx抑制昆虫的后翅发育下游相关基因LdDpp、LdIro、LdVg、LdWg和LdASH的表达量分别较对照显著上调2.40倍、1.88倍、1.81倍、1.89倍和2.81倍。喂食20-氢促肾上腺皮质激素(20E)后,前翼比对照组更平坦、更伸展,导致机翼面积增加,这表明Ubx调节与促肾上腺皮质激素的反馈有关。3个外皮甾体受体基因EcR、EcRA和EcRB的表达水平在LdUbx击倒昆虫中显著低于对照,并且在20E摄食时能够恢复,这表明外皮甾体与LdUbx调节的翅膀发育有关。LdUbx和LdAkt基因的共沉默显著抑制了前翅和后翅的生长,减少了翅膀的面积。综上所述,LdUbx通过体外激素和胰岛素样肽信号通路调控昆虫翅膀发育,为昆虫翅膀发育和分化提供了一种新的分子机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Insect Science
Insect Science 生物-昆虫学
CiteScore
7.80
自引率
5.00%
发文量
1379
审稿时长
6.0 months
期刊介绍: Insect Science is an English-language journal, which publishes original research articles dealing with all fields of research in into insects and other terrestrial arthropods. Papers in any of the following fields will be considered: ecology, behavior, biogeography, physiology, biochemistry, sociobiology, phylogeny, pest management, and exotic incursions. The emphasis of the journal is on the adaptation and evolutionary biology of insects from the molecular to the ecosystem level. Reviews, mini reviews and letters to the editor, book reviews, and information about academic activities of the society are also published.
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