《环境昆虫学报》

作者	单位
程彬，暴峰，陈思羽，刘冬梅，高军勇	1. 吉林省林业科学研究院，长春 130033；2. 吉林省通化县国有林总场，吉林通化 134100

摘要点击次数: 9

全文下载次数: 6

中文摘要:

云杉八齿小蠹Ips typographus是针叶林中最具破坏性的物种之一。雄虫以寄主挥发物作为嗅觉信号搜寻和定位寄主，然后释放信息素吸引同性或异性小蠹群集攻击寄主。寄主植物在受到云杉八齿小蠹为害后，不同寄主植物对云杉八齿小蠹的抗性反应不同，但都能够利用其自身的物理结构、分泌物及挥发性化学物质等抵御小蠹的危害，并合成产生大量的防御化学物质来使其免受侵害，寄主植物这种应对小蠹侵害的能力可能有助于它们的长期生存，这是树木的一种可持续的防御策略。寄主植物对云杉八齿小蠹入侵的有效防御是多阶段系统防御，包括一系列组成和诱导的机制来抵御入侵的云杉八齿小蠹和限制入侵的真菌病原体的传播。寄主植物对植食性昆虫的抗性反应为研发植物诱导剂、植食性昆虫及其天敌的行为调控剂等害虫治理手段开辟了新途径。

英文摘要:

Ips typographus (Coleoptera，Scolytidae) is one of destructive insect pest of coniferous species. Pioneer I. typographus males colonized on spruce trees by using host volatiles as olfactory signals. After excavation of nuptial chambers，they release the aggregation pheromone to attract both female and male conspecifics, and cause a mass aggregation of individuals (mass-attack). During a successful bark beetle attack, systemic acquired resistance (SAR). The resistance reaction of different host plants to the bark beetle was different. An invasion also activates inducible defenses, which may include physical structure, components and volatile chemicals of host plants, and produce a large number of defensive chemicals to resist the damage of I. typographus. Effective defence of a conifer's stem is provided by a multi-stage system, which is chronologically continued and is regulated as a series of multiple resistance mechanisms of both constitutive and inducible defences. Many adaptive plasticity against invading organisms depends on this type of resistance. It triggers qualitative and quantitative differences in the host chemistry, and by a systemic change in the whole tree's metabolism. It provides a sustainable tree defence strategy. This resistance of host trees to plant predators opens up a new way to develop plant inducers and behavioral regulators of insect herbivores and its natural enemies.

查看全文查看/发表评论下载PDF阅读器

关闭