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Reference Detail
| Reference | ||
|---|---|---|
| Author | Shi F., Liu F., He X., Zhu S., Li H., Ding Y., Zhang B., Xu T., Song F. | |
| Title | Mycorrhizal helper bacteria further promote mycorrhizal fungi to improve cold tolerance in rice seedlings: evidence from oxidative stress, osmoregulation, photosynthesis, and related genes in rice. | |
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Abstract: Cold stress critically threatens rice productivity, necessitating innovative strategies to enhance seedling resilience. While arbuscular mycorrhizal fungi (AMF) and associated bacteria synergistically improve plant stress tolerance, their collaborative mechanisms in rice cold adaptation remain underexplored. Here, we developed a composite inoculant combining <i>Rhizophagus intraradices</i> (Ri) with <i>Agrobacterium rhizogenes</i> (Ar) and <i>Bacillus subtilis</i> (Bs) to investigate their synergistic effects under graded cold stress (25-4 °C). The Ri+Ar+Bs (RAB) consortium elevated mycorrhizal colonization by 17% (reaching 87.5%) and synergistically promoted plant growth, increasing height and root length by 9.56% and 43.7%, respectively, under 4 °C stress compared to Ri alone. RAB enhanced antioxidant capacity (24.9% higher SOD activity, 12.37-fold CAT activity) and proline accumulation (78.4%), reducing malondialdehyde (43.7%) and electrolyte leakage (13.64%). Hormonal equilibrium was maintained via upregulated indole-3-acetic acid and gibberellic acid levels. Photosynthetic performance improved significantly (11.29% higher net rate at 4 °C), supported by activation of <i>OsHBP1b</i> and <i>CBF1</i>. Concurrently, RAB upregulated cold-tolerance genes (<i>LTG5RT, OsDREB1A</i>), with functional specialization observed. Ar amplified Ri-mediated height improvement and gene expression, while Bs enhanced root development and photosynthetic efficiency. These findings advance microbial consortia design for climate-resilient agriculture, offering actionable strategies to safeguard rice productivity under extreme cold. |
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| Journal | Front Plant Sci | |
| Country | unknown | |
| Volume | 16 | |
| Pages | 1692304 | |
| Year | 2025 | |
| PubMed ID | 41180407 | |
| PubMed Central ID | 12572616 | |
| DOI | 10.3389/fpls.2025.1692304 | |
| URL | - | |
| Relation | ||
| Gene | DREB1A DREB1B LTG5 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
