Workflow
华南农业大学发表最新Cell论文
生物世界·2025-08-12 10:00

Core Viewpoint - The research highlights the role of the nitrate receptor NRT1.1B as a dual receptor for abscisic acid (ABA) and nitrate, revealing a new mechanism for plants to integrate environmental signals and nutrient utilization [3][4][6]. Group 1: Key Findings - Abscisic acid (ABA) response is strictly regulated by nitrogen nutrition [9]. - NRT1.1B acts as a dual receptor, competitively binding both ABA and nitrate [9]. - The NRT1.1B-SPX4-NLP4 cascade mediates ABA signal transduction from the plasma membrane to the nucleus [9]. - NRT1.1B integrates complex environmental signals across different plant species [9]. Group 2: Mechanism Insights - Under high nitrate conditions, ABA transcriptional response is suppressed, while it is significantly enhanced under low nitrate conditions, indicating a close relationship between ABA signaling and nutritional status [6]. - The formation of the NRT1.1B-ABA complex promotes the release of the transcription factor NLP4, initiating ABA transcriptional responses [6]. - The competitive binding of nitrate and ABA to NRT1.1B allows for flexible responses to fluctuating nutrient conditions, showcasing a sophisticated strategy for balancing nutrient use and stress adaptation in plants [6][9].