Author(s): Kabir Md Alamgir, Yuko Hojo, John T. Christeller, Kaori Fukumoto, Ryutaro Isshiki, Tomonori Shinya, Ian T. Baldwin, Ivan Galis
Title: Systematic analysis of rice (Oryza sativa) metabolic responses to herbivory
Most plants respond to herbivore attack and wounding by production of protective defense metabolites (phytoalexins). We analyzed response of rice plants to two types of herbivores, chewing (lawn armyworm Spodoptera mauritia, rice skipper Parnara guttata) and sucking (brown planthopper Nilaparvata lugens) insects. Both attackers induced strong accumulation of phenolamide phytoalexins in the leaves. In addition, these phenolamides were directly toxic to brown planthoppers when added to artificial diet used for rearing of these insects in the laboratory. Our work proposed a new group of defense compounds in rice that is highly effective against various types of insects. It also provided a potentially new tool for the improvement of herbivore-susceptible rice cultivars by genetically increasing their endogenous phenolamide levels during critical stages of development.
Source:Plant, Cell and Environment: [Epub ahead of print] (2015)