的花朵中的化学多样性对一个食花甲虫虫有影响
R Sasidharan1, L Brokate1, E J Eilers1,2
1Department of Chemical Ecology, Bielefeld University, Bielefeld, Germany.
Plant biology (Stuttgart, Germany)
|September 13, 2023
概括
植物化学多样性影响昆虫的相互作用. Tanacetum vulgare化学型影响了闪耀的花甲虫 (Olibrus aeneus) 的表现,具有特定的形状的特征驱动偏好和生存.
科学领域:
- 植物化学生态学植物化学生态学
- 内部特异性的化学多样性.
- 昆虫与植物的相互作用
背景情况:
- 植物化学成分 (化学多样性) 的种类内变异是常见的.
- 花的化学多样性可以显著影响昆虫食草动物.
- 唐草 (Tanacetum vulgare) 呈现出基于叶子形状的不同化学型.
研究的目的:
- 为了研究三种不同的化学型的Tanacetum vulgare花头和花粉的类和营养成分.
- 评估这些化学类型差异对食偏好,体重增加和闪光花甲虫 (Olibrus aeneus) 的表现的影响.
- 为了确定 terpenoid 形状或营养含量是否驱动昆虫对植物化学型的反应.
主要方法:
- 从三种T. vulgare化学型 (BThu,Keto,Myrox) 的花和花粉中分析了类和营养成分 (糖,氨基酸,脂质).
- 嗅觉和接触选择测试,以评估甲虫在化学类型中的偏好.
- 在短期养试验中测量甲虫体重增加和死亡率.
主要成果:
- 在T. vulgare化学型中,在花头和花粉中观察到类化合物组成和多样性的显著差异.
- 甲虫表现出明显的偏好,偏爱Bthu化学型而不是Myrox,而Keto化学型是排斥性的.
- 甲虫的体重增加和表现在Bthu化学型中最高,而Myrox化学型导致体重增加最低和死亡率最高.
结论:
- 奥利布鲁斯aeneus对Tanacetum vulgare表现出化学型特异性的反应,主要是由于花和花粉类成分的差异.
- 营养成分 (糖,氨基酸,脂质) 在化学类型之间没有显著差异,也不是甲虫反应的主要驱动因素.
- 植物化学化合物的丰富性和多样性都是理解物种内化学多样性对相互作用昆虫的生态后果的关键因素.
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