Innovative screening of plant resistance inducers based on insect symbiotic microorganisms

这项研究开辟了许多新的知识领域，帮助我们更好地了解害虫相关微生物共生体在害虫性能和寄主植物防御中的作用。目前我们研究的主要结论使我们能够提出褐飞虱蜜露确实含有一种复杂的微生物混合物，这些微生物表明了水稻植物入侵昆虫的存在和/或身份。然而，尽管一些信号有助于激活水稻防御，如7-113菌株，但其他信号实际上可以抵消植物防御，如6-22。结果表明，通过加强防御的正向调节作用，可以使防御平衡向强防御倾斜，利用7-113等菌株可以提高水稻生长期间的防御能力，其效果与目前在植物保护中使用的著名木霉生物防治剂相似。此外，这种方法具有成本效益，适用于获得杀虫剂可能非常有限的发展中国家。由于6-22菌株增强了植物对病原菌使用的水杨酸盐信号，我们也希望研究6-22菌株的抗菌性能。

This research opened many new areas of knowledge that help us to better understand the role of pest associated microbial symbionts in pest performance and host plant defense. The main current conclusions of our research allow us to propose that brown planthopper honeydew indeed contains a complex mixture of microorganisms that signal the presence and/or identity of insect invader to rice plant. However, although some signals help to activate rice defense, such as 7-113 strain, others can actually counteract plant defense, such as 6-22. It suggests that enforcing the positive regulators of defense could be used to tip the balance towards the strong defense, and the use of strains such as 7-113 could be useful for improvement of rice defense during growth, which could yield similar effects as well-known Trichoderma biocontrol agent that is currently used in plant protection. In addition, this approach is cost effective and applicable in developing countries where the access to insecticides might be very limited. Because 6-22 strain boosts salicylate signaling used by plants against pathogens, we also hope to investigate antimicrobial properties of 6-22 application.