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. 2023 Oct 27;12(11):1373. doi: 10.3390/biology12111373

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Correlation analysis between the first (A) and second (B) principal components of xylem anatomical parameters and monthly SPEI of F. mandshurica in urban (NF) and rural (LM) areas. The dash line indicates the 0.05 significant level.