科学家揭秘豆科植物待“菌”之道

Core Insights - The research reveals that leguminous plants possess a "signal recognition system" that allows them to distinguish between beneficial rhizobia and harmful pathogens [1] - The study highlights the role of the receptor-like kinase proteins MtLICK1/2 in facilitating the symbiotic relationship with rhizobia while also preventing immune responses against them [2] Group 1 - Leguminous plants secrete a signaling molecule called "nodulation factor" when rhizobia approach, which is recognized by receptor proteins on the plant's surface [1] - The MtLICK1/2 proteins play a crucial role in signal transduction, enabling the formation of root nodules for rhizobia to enter and fix nitrogen [1] - The symbiotic relationship between leguminous plants and rhizobia is efficient and environmentally friendly, reducing reliance on chemical nitrogen fertilizers, which is significant for sustainable agriculture [1] Group 2 - MtLICK1/2 proteins act as "guards" that help plants both welcome beneficial rhizobia and suppress immune responses to avoid mistakenly attacking them [2] - This dual functionality of MtLICK1/2 is essential for the interaction between plants and microorganisms, ensuring a balance between cooperation and defense [2]