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Aims <p>Plants adapt to the surrounding environment via a certain coordinated changes between leaves and roots.</p> Methods <p>This study selected typical afforestation tree seedlings, including N-fixing and non-N-fixing tree species, to examine the response characteristics and coordinated patterns of leaves and absorptive roots of seedlings to phosphorus (P) treatment in South China.</p> Results <p>1) For non-N-fixing species, P addition significantly increased the input of root tissue density (RTD) and specific root area (SRA) of absorptive roots. In addition, P addition also increased the content of non-structural carbohydrates (NSC) in leaves. 2) P addition significantly affected the NSC contents of the absorptive roots in N-fixing species and significantly increased the soluble sugar and decreased the starch contents in the absorptive roots of N-fixing species. 3) The decrease of the root-soil accumulation factor for P (RSAF-P) with the increase of P addition indicated that P application significantly reduced the P acquisition ability of different functional seedlings. However, under appropriate P conditions, it was beneficial to exchange NSC between aboveground and underground parts, and under high P conditions, seedlings increased the RTD of absorptive root to cope with P stress.</p> Conclusions <p>This study demonstrated that P addition primarily influenced the leaf and absorptive root traits in both non-N-fixing and N-fixing tree species. Thus, a moderate supply of P greatly promotes the coordinated changes between roots and leaves, thereby effectively facilitates seedling growth and colonization during the early stage of plantations.</p> Graphical Abstract <p></p>

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The coordinated changes of leaf and root traits of different seedlings to the changed soil phosphorus availability

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Zhihang He,
  • Xiaojuan Gu,
  • Meng Su,
  • Linyunhui Liu,
  • Yiqun Chen,
  • Qing Zhou,
  • Qifeng Mo

摘要

Aims

Plants adapt to the surrounding environment via a certain coordinated changes between leaves and roots.

Methods

This study selected typical afforestation tree seedlings, including N-fixing and non-N-fixing tree species, to examine the response characteristics and coordinated patterns of leaves and absorptive roots of seedlings to phosphorus (P) treatment in South China.

Results

1) For non-N-fixing species, P addition significantly increased the input of root tissue density (RTD) and specific root area (SRA) of absorptive roots. In addition, P addition also increased the content of non-structural carbohydrates (NSC) in leaves. 2) P addition significantly affected the NSC contents of the absorptive roots in N-fixing species and significantly increased the soluble sugar and decreased the starch contents in the absorptive roots of N-fixing species. 3) The decrease of the root-soil accumulation factor for P (RSAF-P) with the increase of P addition indicated that P application significantly reduced the P acquisition ability of different functional seedlings. However, under appropriate P conditions, it was beneficial to exchange NSC between aboveground and underground parts, and under high P conditions, seedlings increased the RTD of absorptive root to cope with P stress.

Conclusions

This study demonstrated that P addition primarily influenced the leaf and absorptive root traits in both non-N-fixing and N-fixing tree species. Thus, a moderate supply of P greatly promotes the coordinated changes between roots and leaves, thereby effectively facilitates seedling growth and colonization during the early stage of plantations.

Graphical Abstract