science20130111-3

来自美国华盛顿大学和亚利桑那大学的研究人员发现烟草天蛾除了利用先天的技能采食有吸引力的花朵外,还能够利用章鱼胺途径学习到采食新花朵的技能。

-2013年1月11日《科学》

中文翻译


【题目】传粉者采食花蜜的神经基础:烟草天蛾的嗅觉特异化和后天学习

【译文】传粉者往往表现出一系列与花朵的接触的先天性和后天性行为,但是科学家对自然环境下的这些行为的嗅觉机制仍然是知之甚少。烟草天蛾(Manduca sexta)虽是许多夜间开花植物的重要传粉者,但其也能通过嗅觉条件化,学到采食其他含花蜜植物的技能。我们对生来就能吸引飞蛾的花朵进行分析,发现这些花朵的气味都具有相似的化学特性,反之,这一化学特性被唯一地印记在飞蛾的触角(嗅觉器官)神经叶中。飞蛾能灵活地采食无吸引力的花朵,然而,在后天学习过程中,章鱼胺关联的触角神经叶神经元会调节这种灵活性。此外,这种灵活性不会消除先天的气味偏好。花朵气味通过两个嗅觉通道刺激飞蛾,一个参与先天的气味偏好,另一个与后天学习相关,使得飞蛾能够生活在不断开花的环境中同时保持特异性的气味偏好。

英文原稿


[Title]: Neural Basis of a Pollinator’s Buffet: Olfactory Specialization and Learning in Manduca sexta  

[Authors]: Jeffrey A. Riffell, Hong Lei, Leif Abrell, and John G. Hildebrand

[Abstract]: Pollinators exhibit a range of innate and learned behaviors that mediate interactions with flowers, but the olfactory bases of these responses in a naturalistic context remain poorly understood. The hawkmoth Manduca sexta is an important pollinator for many night-blooming flowers but can learn—through olfactory conditioning—to visit other nectar resources. Analysis of the flowers that are innately attractive to moths shows that the scents all have converged on a similar chemical profile that, in turn, is uniquely represented in the moth‘s antennal (olfactory) lobe. Flexibility in visitation to nonattractive flowers, however, is mediated by octopamine-associated modulation of antennal-lobe neurons during learning. Furthermore, this flexibility does not extinguish the innate preferences. Such processing of stimuli through two olfactory channels, one involving an innate bias and the other a learned association, allows the moths to exist within a dynamic floral environment while maintaining specialized associations.

原文地址

http://www.sciencemag.org/content/339/6116/200.short

本站声明: 生物文库所有文章欢迎转载,所有文章未说明,均属于原创,转载均请注明出处。
本文链接: http://www.bioku.cn/201303/science-scent-olfactory-conditioning-antennal-lobe-octopamine/
版权所有: 生物文库 - 生物医学、生物技术核心期刊文摘

留言


三 + 7 =


沪ICP备12028140号
点击这里给我发消息   点击这里给我发消息