桃红蓟马
蚜虫
生物
蚕豆
食草动物
豌豆
植物
昆虫
植物对草食的防御
生物测定
化学生态学
蚜虫科
信息素
寄主(生物学)
生态学
同翅目
生物化学
有害生物分析
基因
作者
Pasquale Cascone,József Vuts,Michael A. Birkett,Sarah Y. Dewhirst,Sergio Rasmann,John A. Pickett,Emilio Guerrieri
摘要
While mechanisms of plant-plant communication for alerting neighbouring plants of an imminent insect herbivore attack have been described aboveground via the production of volatile organic compounds (VOCs), we are yet to decipher the specific components of plant-plant signalling belowground. Using bioassay-guided fractionation, we isolated and identified the non-protein amino acid l-DOPA, released from roots of Acyrtosiphon pisum aphid-infested Vicia faba plants, as an active compound in triggering the production of VOCs released aboveground in uninfested plants. In behavioural assays, we show that after contact with l-DOPA, healthy plants become highly attractive to the aphid parasitoid (Aphidius ervi), as if they were infested by aphids. We conclude that l-DOPA, originally described as a brain neurotransmitter precursor, can also enhance immunity in plants.
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