中国科学院发表最新Science论文

Core Viewpoint - The article discusses a significant breakthrough in plant stem cell regulation, revealing the decisive role of cell wall microstructure in maintaining stem cell homeostasis and decoding the "cell wall code" that determines plant cell fate [3][10]. Group 1: Research Findings - The research team from the Chinese Academy of Sciences published a study in Science, highlighting the importance of pectin's methylation modification in the mechanical properties of the cell wall, which influences stem cell dynamics [3][10]. - A unique "binary distribution" pattern of pectin was identified, where highly methylated pectin is found in mature cell walls, while demethylated pectin is enriched in the new cell plate, creating mechanical heterogeneity that supports stem cell proliferation [5][10]. - The study also uncovered a sophisticated "timed release system" for PME5 mRNA, which is crucial for regulating pectin demethylation during cell division, linking stem cell proliferation with cell wall remodeling [6][10]. Group 2: Implications for Agriculture - The newly discovered mechanism of mRNA nuclear retention and its role in stem cell activity is conserved across various crops, including maize, soybean, and tomato, suggesting its potential impact on agricultural traits such as plant height, tiller number, and fruit size [10]. - The findings provide a theoretical basis and technical pathway for enhancing stem cell activity in crops, which could lead to improved yield and quality in agricultural breeding, aligning with carbon neutrality goals [10].