一种寻觅、一份坚持 科研人员破译豆科植物与根瘤菌“共舞”之谜

Core Insights - A groundbreaking research paper titled "Molecular Mechanism of Flavonoid Compound-Specific Binding Activating NodD in Rhizobia" was published by a team from the Chinese Academy of Sciences, revealing the molecular-level mechanisms of specific recognition between leguminous plants and rhizobia, further decoding their "symbiotic code" [1][3]. Group 1: Research Findings - The study elucidates the mutualistic relationship where leguminous plants provide carbon sources to rhizobia, which in return convert atmospheric nitrogen into nutrients usable by plants [3]. - Leguminous roots secrete flavonoid compounds that act as chemical signals, akin to a "signal key," which are recognized by the NodD protein in rhizobia, functioning as a "molecular lock" to trigger the symbiotic program [3][4]. - The research highlights the long-term co-evolution that enables precise recognition between the signal and the lock, suggesting potential for engineering NodD proteins to create efficient nitrogen-fixing strains tailored for specific crops [4]. Group 2: Implications for Agriculture - The findings could lead to the development of nitrogen-fixing bacteria that can establish similar symbiotic relationships with non-leguminous crops like rice and corn, thereby reducing agricultural dependence on fertilizers [4]. - The research emphasizes the importance of detailed observation and perseverance in scientific inquiry, despite external skepticism regarding the value of continued research on established discoveries [5].