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. 2025 Jul 8;16:1601585. doi: 10.3389/fpls.2025.1601585

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Copyright © 2025 Ren, Li, Zhang, Yang, Liu, Fan and Xiang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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A correlation matrix depicting relationships between nineteen variables labeled Bio1 to Bio19. Colored ellipses indicate the strength and direction of correlations, with a gradient bar on the right ranging from orange to teal, representing values from positive one point zero to negative one point zero. Each cell's color and orientation signify the degree and type of correlation, with orange for positive and teal for negative correlations. Numerical correlation values are displayed within the cells. — Correlation analysis of nineteen environmental factors with M. officinalis.