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Factors driving the positive resorption of aluminum and iron from old leaves

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Abstract

Purpose

Leaf resorption is an important mechanism for plant nutrient conservation, but not all elements are resorbed by plants. It is generally believed that aluminum (Al) and iron (Fe) are not resorbed from old leaves due to the potentially toxic effects. However, positive Al and Fe resorption has been found in some specific cases. To date, no one has addressed these specific cases and the underlying mechanisms.

Methods

Here, a data synthesis was conducted to explore the patterns and controls on leaf resorption efficiency of Al and Fe based on 34 published studies with 272 data points.

Results

Low temperature and low soil pH may favor the positive resorption of Al from old leaves. Low precipitation and high soil pH may favor the positive resorption of Fe. In addition, the Fe resorption efficiency was positive in nitrogen-fixing plants (39.2%) but was negative in non-nitrogen-fixing plants (−30.5%).

Conclusions

This study highlights that Al and Fe can be resorbed from old leaves, depending mainly on plant functional group and soil environment. This knowledge is an important supplement for understanding leaf resorption processes, and is helpful in modeling global biogeochemical cycles.

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Data availability

The datasets in this work are available from Science Data Bank (https://www.scidb.cn/en/anonymous/ZnFtcVF6).

References

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Acknowledgements

We thank Dr. Huaihai Chen for the internal review of our manuscript. This work was supported by Shenzhen Science and Technology Program (Grant No. JCYJ20220530150015035) and Young Teachers Team Project of Fundamental Research Funds for the Central Universities, Sun Yat-sen University (Project no. 22qntd2702). The work was also funded by Guangdong Dinghushan National Scientific Forest Ecosystem Observation and Research Field Station.

Funding

This work was supported by Shenzhen Science and Technology Program (Grant No. JCYJ20220530150015035) and Young Teachers Team Project of Fundamental Research Funds for the Central Universities, Sun Yat-sen University (Project no. 22qntd2702). The work was also funded by Guangdong Dinghushan National Scientific Forest Ecosystem Observation and Research Field Station.

Author information

Authors and Affiliations

Authors

Contributions

Hao Chen designed the study. Data extraction and analysis were performed by Nan Hu, Xibin Sun, Qianhao Xu, and Meimei Li. The first draft of the manuscript was written by Nan Hu and Hao Chen, and all authors contributed to the revision of the manuscript.

Corresponding author

Correspondence to Hao Chen.

Ethics declarations

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Responsible Editor: Hans Lambers.

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Hu, N., Mao, Q., Zhong, X. et al. Factors driving the positive resorption of aluminum and iron from old leaves. Plant Soil 488, 443–450 (2023). https://doi.org/10.1007/s11104-023-05984-x

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  • DOI: https://doi.org/10.1007/s11104-023-05984-x

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