Effects of arbuscular mycorrhizal fungi on the growth and metabolism of perennial ryegrass (Lolium perenne) under salt stress

Authors

  • Wei LI Qingdao Agricultural University, College of Landscape Architecture and Forestry, Qingdao, Shandong, 266109; Qingdao Agricultural University, Institute of Mycorrhizal Biotechnology, Qingdao, Shandong, 266109 (CN)
  • Yan-Lin ZHAI Qingdao Agricultural University, College of Landscape Architecture and Forestry, Qingdao, Shandong, 266109; Qingdao Agricultural University, Institute of Mycorrhizal Biotechnology, Qingdao, Shandong, 266109 (CN)
  • Xue-Yi HU Qingdao Agricultural University, College of Landscape Architecture and Forestry, Qingdao, Shandong, 266109; Qingdao Agricultural University, Institute of Mycorrhizal Biotechnology, Qingdao, Shandong, 266109 (CN)
  • Shao-Xia GUO Qingdao Agricultural University, College of Landscape Architecture and Forestry, Qingdao, Shandong, 266109; Qingdao Agricultural University, Institute of Mycorrhizal Biotechnology, Qingdao, Shandong, 266109 (CN)

DOI:

https://doi.org/10.15835/nbha51112649

Keywords:

arbuscular mycorrhizal fungi, salt stress, Lolium perenne, photosynthesis, chlorophyll fluorescence

Abstract

Perennial ryegrass is considered an excellent cold-season turfgrass, and salinity is an important environmental factor that affects its growth. Many studies have shown that arbuscular mycorrhizal (AM) fungi can alleviate stress responses in plants, but there have been few reports on the promotion of turfgrass growth in saline-alkali land by AM fungi. We designed an experiment to investigate the effects of different saline conditions (0%, 0.05%, 0.1% salt, w/w) on the growth and physiological metabolism of perennial ryegrass. The results showed that under 0.05% salt stress, AM fungi increased the plant height by 25.9%, the aboveground and underground dry weight by 37.1% and 55.6%, respectively; and the content of chlorophyll a in the plants by 31.0%. Inoculation with AM fungi increased the net photosynthetic rate (A), transpiration rate (E), intercellular CO2 concentration (Ci), and stomatal conductance (Gs) of perennial ryegrass, and the increase in their levels negatively correlated with increasing salt concentrations. Under 0.1% salt stress, the A, Ci, Gs, and E of perennial ryegrass inoculated with AM fungi increased by 24.6%, 23.2%, 139.1%, and 40.7%, respectively. However, inoculation with AM fungi reduced Fv/Fm and had no significant impacts on the SOD activity, MDA, proline (Pro) content, soluble sugar content, and soluble protein content of perennial ryegrass. In conclusion, AM fungi can promote the growth of perennial ryegrass under salt stress, enhance its photosynthetic capacity, and improve the ability of perennial ryegrass to resist salt stress.

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Published

2023-02-14

How to Cite

LI, W., ZHAI, Y.-L., HU, X.-Y., & GUO, S.-X. (2023). Effects of arbuscular mycorrhizal fungi on the growth and metabolism of perennial ryegrass (Lolium perenne) under salt stress. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 51(1), 12649. https://doi.org/10.15835/nbha51112649

Issue

Vol. 51 No. 1 (2023)

Section

Research Articles
CITATION
DOI: 10.15835/nbha51112649

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Copyright (c) 2023 Wei LI, Yan-Lin ZHAI, Xue-Yi HU, Shao-Xia GUO

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