变温条件下红嘴相思鸟黄体生成素分泌节律的可塑性及个体间变异  

Plasticity and Inter-individual Variability of Luteinizing Hormone Secretion Rhythm in Red-billed Leiothrix Under the Condition of Variable Temperature

作　　者：高静[1] 田姗[1] 张淑萍[1] 

机构地区：[1]中央民族大学生命与环境科学学院,北京100081

出　　处：《四川动物》2014年第2期174-178,共5页Sichuan Journal of Zoology

基　　金：国家自然科学基金(31372225)

摘　　要：鸟类的生殖内分泌主要受光周期调控,在全球气候变化的背景下,鸟类生殖内分泌轴(HPG)分泌节律适应温度变化的可塑性及个体间变异则决定了种群适应气候变化的微进化潜能。以黄体生成素(LH)为指标研究了红嘴相思鸟HPG轴分泌节律的温度可塑性及个体间变异。研究结果表明:(1)温度升高可引起红嘴相思鸟LH分泌活动。(2)高温组和低温组红嘴相思鸟血浆LH水平均存在个体差异,高温组的个体间变异总体上大于低温组。一些个体具有较大的HPG轴可塑性,能够提前分泌LH。研究结果表明温度升高条件下,红嘴相思鸟HPG轴活动具有提前的可能性,且种群内存在个体间差异,一些个体可提前启动生殖,进而适应可能出现的环境变化。为探讨鸟类适应气候变化的微进化潜能提供了参考信息。The secretion of birds reproductive endocrine was mainly regulated by photoperiod. The temperature plasticity of birds reproductive endocrine （HPG） secretion rhythm and variation between individuals determined the micro evolution potential of populations adapt to climate change. In this paper, luteinizing hormone （LH） was used as an indicator to study the temperature plasticity of red-billed leiothrix HPG axis secretion rhythm and inter-individual variation. The results showed that： （1） increased temperature can cause elevated activity of red-billed leiothrix LH. （2） There were individual differences between the LH levels of red-billed leiothrix plasma exposing in high and low temperature conditions, and variation of individuals in high temperature was greater than that in low temperature. Some individuals with larger HPG axis plasticity can advance the LH secretion. Additionally, the leiothrix HPG axis activity could be advanced along with the increasing temperature, and this ability was varied between individuals and populations. Therefore, this study provides a reference to investigate the micro evolution potential of birds to adapt to climate change.

关 键 词：红嘴相思鸟 温度 黄体生成素 表型可塑性 个体间差异 

分 类 号：Q958[生物学—动物学]