Scholarlink

Background and aims <p>Phosphorus (P) is a critical yet often limited nutrient in ecosystems, affecting plant growth and nutrient cycling. Moso bamboo (<i>Phyllostachys edulis</i>), a widely cultivated species, frequently encounters P deficiency in soils. This study explores its P acquisition strategies, focusing on root adaptations, nutrient allocation, and enzymatic activities under varying soil P conditions.</p> Methods <p>A pot experiment with <i>P. edulis</i> seedlings was conducted under three P treatments: low (P1: 5&#xa0;mg·kg<sup>−1</sup>), medium (P2: 10&#xa0;mg·kg<sup>−1</sup>), and high (P3: 20&#xa0;mg·kg<sup>−1</sup>). We assessed the root morphology and the nutrient content in plant tissues, including total nitrogen (TN), total phosphorus (TP), and total potassium (TK). in plant tissues, and key intracellular enzymes in roots (acid phosphatase (ACP), deoxyribonuclease(DNase), ribonuclease (RNase)) with P mobilizing capacity involved in P acquisition.. Soil nutrient levels TN、TP、available nitrogen (AN)、available phosphorus (AP)、available potassium (AK)、soil organic matter (SOM). were also monitored to assess cycling dynamics.</p> Results <p>Our findings indicate that during the T1 growth stage, there were significant spatiotemporal variations in soil TN and TP content. Root hair density, length, and lateral root number increased significantly, while intracellular enzyme activity in <i>P. edulis</i> roots gradually declined with increasing P supply. By the T2 growth stage, TP exhibited a linear increase with P supply levels, and root volume and surface area surpassed those under the P3 treatment. Only DNase activity maintained significant P supply-dependent differences. Internal nutrient allocation shifted, with a notable decrease in P content in roots, stems, and leaves, while nitrogen (N) and potassium (K) levels remained stable.</p> Conclusion <p><i>P. edulis</i> adapts to low-phosphorus environments via three primary mechanisms: altering rhizospheric soil environment, modifying root architecture, and redistributing nutrients. While short-term variations in soil phosphorus levels remain negligible, long-term phosphorus management is critical for enhancing nutrient cycling and promoting <i>P. edulis</i> growth.&#xa0;</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

Phosphorus deficiency promotes root morphological and biochemical changes to enhance phosphorus uptake in Phyllostachys edulis seedlings

  • 期刊论文

  • 发表日期：

    2025年5月28日

查看全文
  • Wenhui Shi,
  • Tengfei Cao,
  • Zhuan Yuan,
  • Yangrui Wang,
  • Yeqing Ying

摘要

Background and aims

Phosphorus (P) is a critical yet often limited nutrient in ecosystems, affecting plant growth and nutrient cycling. Moso bamboo (Phyllostachys edulis), a widely cultivated species, frequently encounters P deficiency in soils. This study explores its P acquisition strategies, focusing on root adaptations, nutrient allocation, and enzymatic activities under varying soil P conditions.

Methods

A pot experiment with P. edulis seedlings was conducted under three P treatments: low (P1: 5 mg·kg−1), medium (P2: 10 mg·kg−1), and high (P3: 20 mg·kg−1). We assessed the root morphology and the nutrient content in plant tissues, including total nitrogen (TN), total phosphorus (TP), and total potassium (TK). in plant tissues, and key intracellular enzymes in roots (acid phosphatase (ACP), deoxyribonuclease(DNase), ribonuclease (RNase)) with P mobilizing capacity involved in P acquisition.. Soil nutrient levels TN、TP、available nitrogen (AN)、available phosphorus (AP)、available potassium (AK)、soil organic matter (SOM). were also monitored to assess cycling dynamics.

Results

Our findings indicate that during the T1 growth stage, there were significant spatiotemporal variations in soil TN and TP content. Root hair density, length, and lateral root number increased significantly, while intracellular enzyme activity in P. edulis roots gradually declined with increasing P supply. By the T2 growth stage, TP exhibited a linear increase with P supply levels, and root volume and surface area surpassed those under the P3 treatment. Only DNase activity maintained significant P supply-dependent differences. Internal nutrient allocation shifted, with a notable decrease in P content in roots, stems, and leaves, while nitrogen (N) and potassium (K) levels remained stable.

Conclusion

P. edulis adapts to low-phosphorus environments via three primary mechanisms: altering rhizospheric soil environment, modifying root architecture, and redistributing nutrients. While short-term variations in soil phosphorus levels remain negligible, long-term phosphorus management is critical for enhancing nutrient cycling and promoting P. edulis growth.