Year of the Tiger off to a good start!The Chinese research team has its first Science cover paper

On 4 February, molecular plant science, Chinese Academy of Sciences excellence innovation center da-peng li team cooperation with Germany’s Max Planck institute for chemical ecology in science published a paper in the form of the cover paper, reveals how ingenious assembly plant for the first time the specific metabolites to cope with major agricultural pests small leafhoppers non host resistance mechanism.This result not only opens up a new naturalism-driven multiomics analysis method for exploring plant-insect interactions, but also provides a new metabolic perspective on how plants can specifically schedule their chemical “defense barriers” to resist insect attacks. It is a major breakthrough in the study of non-host resistance of plants to polyvorous insects.At the same time, this study applied the means of synthetic biology to carry out the non-host resistance metabolic transformation of crops for the first time, providing a new feasible application scheme for precise green agricultural prevention and control technology.Empoasca leafhopper is a worldwide pest that seriously harms crops, causing serious crop yield and economic losses every year.The current control method is to spray a large number of pesticides, but the control effect is limited and costly.Plants are natural organic synthesis experts. Because they are fixed on the ground, they cannot escape harm like animals. Therefore, plants have evolved to produce specific metabolites with complex and diverse structures to adapt to their complex and varied living environment.In global warming and global herbivore is a changing world, the opportunist plants insects interaction will be the future leading interactive mode of natural and artificial ecosystem, to the plant how to deal with this kind of speculative host interaction of cognition to address climate change will greatly help us to design the future of green crops.In this study, the team planted a total of 1816 recombinant inbred lines from 26 parents with different genetic backgrounds in the field for “interception” and host selection by leafhoppers.When leafhoppers are free to attack these plants, their attack rate can be used to help determine the genetic elements of the transition from non-host plant to host plant.In this study, a novel plant-specific metabolite was identified as a key compound for non-host resistance to cicadas by combining forward and reverse genetics driven by natural history, transcriptomics and untargeted structural metabolomics, and named CPH.We found that JAZi, the unconventional jasmonine element, is specifically expressed in attacked leaves and activates CPH synthesis regulated by jasmonine only when plants are attacked by leafhoppers, but not by other insects.Cleverly, the compound condenses three metabolic pathways, one of which is composed of green leaf volatilization pathway, which is the core of indirect defense of plant volatilization, and the other two pathways are involved in direct defense synthesis.So this study is the first to explain how direct and indirect defense pathways in plants cleverly “talk and schedule” the synthesis of their metabolic weapons.Finally, the team used synthetic biology to integrate this metabolic pathway into crops such as tomatoes and broad beans, and designed a high-resistance plant for leafhoppers’ non-host selection.The agricultural green Revolution, which began in the 1960s, increased crop yields as never before.Today, the population continues to grow, while increasing droughts, fungal invasions and pests caused by global warming pose great challenges to future agricultural development.Plants are the most complex and sophisticated chemical designers, and the combination of natural-driven multiomics analysis and synthetic biology used in this study will provide a new metabolic dimension for discovering chemical innovations that have evolved over millions of years in plants and for designing the second generation of high-yield, high-quality and resilient crops for the green Revolution.Source: CCTV News Review: Tan Lugang

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