New Phytologist (2012) 194, 498-510
Zhaojun Xin, Zhaonan Yu, Matthias Erb, Ted C.J. Turlings, Baohui Wang, Jinfeng Qi, Shengning Liu and Yonggen Lou (2012)
The broad-leaf herbicide 2,4-dichlorophenoxyacetic acid turns rice into a living trap for a major insect pest and a parasitic wasp
New Phytologist 194 (2), 498-510
Abstract: - Synthetic chemical elicitors of plant defense have been touted as a powerful means for sustainable crop protection. Yet, they have never been successfully applied to control insect pests in the field.
- We developed a high-throughput chemical genetics screening system based on a herbivore-induced linalool synthase promoter fused to a β-glucuronidase (GUS) reporter construct to test synthetic compounds for their potential to induce rice defenses.
- We identified 2,4-dichlorophenoxyacetic acid (2,4-D), an auxin homolog and widely used herbicide in monocotyledonous crops, as a potent elicitor of rice defenses. Low doses of 2,4-D induced a strong defensive reaction upstream of the jasmonic acid and ethylene pathways, resulting in a marked increase in trypsin proteinase inhibitor activity and volatile production. Induced plants were more resistant to the striped stem borer Chilo suppressalis, but became highly attractive to the brown planthopper Nilaparvata lugens and its main egg parasitoid Anagrus nilaparvatae. In a field experiment, 2,4-D application turned rice plants into living traps for N. lugens by attracting parasitoids.
- Our findings demonstrate the potential of auxin homologs as defensive signals and show the potential of the herbicide to turn rice into a selective catch crop for an economically important pest.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Yong-Gen Lou, Ted C.J. Turlings
Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host
control - general
Research topic(s) for beneficials or antagonists:
Pest and/or beneficial records:
|Nilaparvata lugens||Rice (Oryza)|
|Chilo suppressalis||Rice (Oryza)|
|Anagrus nilaparvatae (parasitoid)||Nilaparvata lugens||Rice (Oryza)|