The plant terpenes DMNT and TMTT function as signaling compounds that attract Asian corn borer (Ostrinia furnacalis) to maize plants.

IF 9.3 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Journal of Integrative Plant Biology Pub Date : 2024-08-22 DOI:10.1111/jipb.13763
Mengjie Zhao, Shijie Huang, Qingyang Zhang, Yuming Wei, Zhen Tao, Chuanhong Wang, Yibing Zhao, Xinqiao Zhang, Jinghui Dong, Ling Wang, Chen Chen, Tengyue Wang, Peijin Li
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Abstract

During their co-evolution with herbivorous insects, plants have developed multiple defense strategies that resist pests, such as releasing a blend of herbivory-induced plant volatiles (HIPVs) that repel pests or recruit their natural enemies. However, the responses of insects to HIPVs in maize (Zea mays L.) are not well understood. Here, we demonstrate that the Asian corn borer (ACB, Ostrinia furnacalis), a major insect pest of maize, shows a preference for maize pre-infested with ACB larvae rather than being repelled by these plants. Through combined transcriptomic and metabolomics analysis of ACB-infested maize seedlings, we identified two substances that explain this behavior: (E)-4,8-dimethylnona-1,3,7-triene (DMNT) and (3E,7E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene (TMTT). DMNT and TMTT attracted ACB larvae, and knocking out the maize genes responsible for their biosynthesis via gene editing impaired this attraction. External supplementation with DMNT/TMTT hampered the larvae's ability to locate pre-infested maize. These findings uncover a novel role for DMNT and TMTT in driving the behavior of ACB. Genetic modification of maize to make it less detectable by ACB might be an effective strategy for developing maize germplasm resistant to ACB and for managing this pest effectively in the field.

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植物萜烯 DMNT 和 TMTT 是吸引亚洲玉米螟(Ostrinia furnacalis)的信号化合物。
在与食草昆虫共同进化的过程中,植物开发出了多种抵御害虫的防御策略,例如释放混合的食草诱导植物挥发物(HIPVs),以驱赶害虫或招引其天敌。然而,昆虫对玉米(Zea mays L.)中 HIPVs 的反应并不十分清楚。在这里,我们证明了玉米的主要害虫亚洲玉米螟(ACB,Ostrinia furnacalis)偏爱预先侵染过 ACB 幼虫的玉米,而不是被这些植物驱赶。通过对受 ACB 侵染的玉米幼苗进行转录组学和代谢组学分析,我们发现了两种可以解释这种行为的物质:(E)-4,8-二甲基壬-1,3,7-三烯(DMNT)和(3E,7E)-4,8,12-三甲基十三烯-1,3,7,11-四烯(TMTT)。DMNT 和 TMTT 能吸引 ACB 幼虫,而通过基因编辑敲除负责其生物合成的玉米基因会削弱这种吸引力。外部补充DMNT/TMTT阻碍了幼虫找到预先侵染的玉米的能力。这些发现揭示了 DMNT 和 TMTT 在驱动 ACB 行为中的新作用。对玉米进行基因改造,使其不易被虫害克星探测到,可能是开发抗虫害克星玉米种质和在田间有效防治这种害虫的有效策略。
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来源期刊
Journal of Integrative Plant Biology
Journal of Integrative Plant Biology 生物-生化与分子生物学
CiteScore
18.00
自引率
5.30%
发文量
220
审稿时长
3 months
期刊介绍: Journal of Integrative Plant Biology is a leading academic journal reporting on the latest discoveries in plant biology.Enjoy the latest news and developments in the field, understand new and improved methods and research tools, and explore basic biological questions through reproducible experimental design, using genetic, biochemical, cell and molecular biological methods, and statistical analyses.
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