Scholarlink

<p>Plant functional traits reflect evolutionary history and shape plant performance. However, current studies have mainly focused on traits of single organ, and a systematic understanding of how nitrogen (N) deposition regulates functional traits across multiple organs is still lacking. Based on a nine-year N fertilization experiment conducted in China, this study focused on <i>Pinus tabuliformis</i>, a dominant species in temperate forest ecosystems. We measured core functional traits in current-year needles, perennial needles, twigs, stems, and fine roots, and systematically evaluated the effects of N addition on resource-use strategies and the topological structure of the plant trait network in <i>P. tabuliformis</i>. Our results showed that: (1) traits of current-year needles, perennial needles, twigs, stems, and fine roots collectively delineated two orthogonal axes of functional trade-offs; (2) N addition shifted the resource-use strategies of twigs and stems from conservative to acquisitive, but had no significant effects on those of current-year needles, perennial needles, or fine roots; (3) N addition increased edge density and clustering coefficient, and reduced network diameter, path length, and modularity, suggesting a more highly integrated plant trait network. Moreover, N addition shifted hub organs in the trait network from fine roots to stems, and hub traits from specific root length to stem phosphorus content. Overall, N addition altered resource-use strategies of <i>P. tabuliformis</i> in an organ-specific manner. Compared with previous studies that mainly focused on single organ, our whole-plant approach provides a more comprehensive perspective on how plant functional traits respond to N enrichment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of nitrogen addition on functional traits and their associations across multiple organs in Pinus tabuliformis

  • 期刊论文

  • 发表日期：

    2026年5月30日

查看全文
  • Jiangshan Yu,
  • Hao Xu,
  • Jihua Hou

摘要

Plant functional traits reflect evolutionary history and shape plant performance. However, current studies have mainly focused on traits of single organ, and a systematic understanding of how nitrogen (N) deposition regulates functional traits across multiple organs is still lacking. Based on a nine-year N fertilization experiment conducted in China, this study focused on Pinus tabuliformis, a dominant species in temperate forest ecosystems. We measured core functional traits in current-year needles, perennial needles, twigs, stems, and fine roots, and systematically evaluated the effects of N addition on resource-use strategies and the topological structure of the plant trait network in P. tabuliformis. Our results showed that: (1) traits of current-year needles, perennial needles, twigs, stems, and fine roots collectively delineated two orthogonal axes of functional trade-offs; (2) N addition shifted the resource-use strategies of twigs and stems from conservative to acquisitive, but had no significant effects on those of current-year needles, perennial needles, or fine roots; (3) N addition increased edge density and clustering coefficient, and reduced network diameter, path length, and modularity, suggesting a more highly integrated plant trait network. Moreover, N addition shifted hub organs in the trait network from fine roots to stems, and hub traits from specific root length to stem phosphorus content. Overall, N addition altered resource-use strategies of P. tabuliformis in an organ-specific manner. Compared with previous studies that mainly focused on single organ, our whole-plant approach provides a more comprehensive perspective on how plant functional traits respond to N enrichment.