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Aims <p>To investigate whether arbuscular mycorrhizal fungi (AMF) and nitrogen-fixing bacteria (NFB) can reduce nitrogen (N) limitation in halophytes and increase the ability of three halophytes to decrease soil salt content.</p> Methods <p>In a potting experiment, three different halophytes (<i>Suaeda salsa</i>, <i>Phragmites australis</i> and <i>Limonium bicolor</i>, which are salt-aggregating, salt-rejecting and salt-secreting plants, respectively) underwent four treatments (CK, no addition; FT, AMF addition treatment; BT, NFB addition treatment; FT + BT, AMF and NFB addition treatment) to investigate the effects of AMF and NFB on plant biomass and N content and soil salt content.</p> Results <p>AMF and NFB increased halophytes biomass with a significant synergistic effect. The increase in biomass of <i>Suaeda salsa</i> (<i>S.salsa</i>) was primarily composed of aboveground biomass, whereas the increase in biomass of <i>Phragmites australis</i> (<i>P.australis</i>) and <i>Limonium bicolor</i> (<i>L.bicolor</i>) was primarily from belowground biomass. The BT and FT + BT treatments increased belowground N content but decreased aboveground N content of <i>P.australis</i> and <i>L.bicolor</i>. FT, NFB and FT + BT increased the total Na<sup>+</sup> content in <i>S.salsa</i> and <i>L.bicolor</i>. There was no change in soil salt content of <i>P.australis</i>, but soil salt contents of <i>S.salsa</i> and <i>L.bicolor</i> decreased and reached a minimum in FT + BT, which indicated that inoculation of AMF and NFB into salt-aggregating and salt-secreting plants effectively decreased soil salt content.</p> Conclusions <p>AMF and NFB alleviated plant N limitation, increased plant biomass, and reduced soil salt by increasing the salt uptake of <i>S. salsa</i> and <i>L. bicolor</i>.</p>

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Nitrogen-fixing bacteria and arbuscular mycorrhizal fungi alleviated nitrogen limitation in halophytes and reduced soil salinity in salt-aggregating and salt-secreting plants

  • 期刊论文

  • 发表日期：

    2026年1月28日

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  • Zehao Zhang,
  • Tian Li,
  • Rui Hu,
  • Zhanyong Fu,
  • Yao Zhang,
  • Jinzhao Ma,
  • Ping Wang,
  • Jingkuan Sun

摘要

Aims

To investigate whether arbuscular mycorrhizal fungi (AMF) and nitrogen-fixing bacteria (NFB) can reduce nitrogen (N) limitation in halophytes and increase the ability of three halophytes to decrease soil salt content.

Methods

In a potting experiment, three different halophytes (Suaeda salsa, Phragmites australis and Limonium bicolor, which are salt-aggregating, salt-rejecting and salt-secreting plants, respectively) underwent four treatments (CK, no addition; FT, AMF addition treatment; BT, NFB addition treatment; FT + BT, AMF and NFB addition treatment) to investigate the effects of AMF and NFB on plant biomass and N content and soil salt content.

Results

AMF and NFB increased halophytes biomass with a significant synergistic effect. The increase in biomass of Suaeda salsa (S.salsa) was primarily composed of aboveground biomass, whereas the increase in biomass of Phragmites australis (P.australis) and Limonium bicolor (L.bicolor) was primarily from belowground biomass. The BT and FT + BT treatments increased belowground N content but decreased aboveground N content of P.australis and L.bicolor. FT, NFB and FT + BT increased the total Na+ content in S.salsa and L.bicolor. There was no change in soil salt content of P.australis, but soil salt contents of S.salsa and L.bicolor decreased and reached a minimum in FT + BT, which indicated that inoculation of AMF and NFB into salt-aggregating and salt-secreting plants effectively decreased soil salt content.

Conclusions

AMF and NFB alleviated plant N limitation, increased plant biomass, and reduced soil salt by increasing the salt uptake of S. salsa and L. bicolor.