PDF
Full
Outline
Acidic soil accounts for approximately 50% of the world’s available arable land. Its highly active aluminum ions and low pH environment not only directly inhibit plant growth but also significantly alter the microbial community structure in the rhizosphere, weaken the functions of beneficial microorganisms, and exacerbate soil-borne diseases. Brassinolide (BR), as a group of important plant signaling molecules, play a core role in enhancing the plant stress resistance in acidic soil by precisely regulating plant-microorganism interactions. BR promote the root secretion of organic acids such as malic acid and oxalic acid by activating BZR1/BES1 and transcription factors. These secretions act as carbon sources and chemotactic signals to specifically recruit beneficial microorganisms such as Paenibacillus azotofixans, Pseudomonas, and ectomycorrhizal fungi, reshaping the microbial community structure in the rhizosphere. The microbial community reassembly induced by BR significantly enhances aluminum ion chelation, nutrient activation, and pathogen inhibition. For instance, nitrogen-fixing bacteria enriched utilize malic acid for metabolic activities and secrete auxin and other substances to promote plant growth in acidic environments. Ectomycorrhizal fungi alleviate aluminum toxicity through oxalic acid secretion. Meanwhile, BR, in collaboration with plant hormones such as auxin and gibberellin, optimizes the root structure, expands the microbial colonization niche, and forms a complex synergistic network for enhancing stress resistance. Future research should focus on the specific regulatory mechanisms of BR on the rhizosphere microbiome, unveil the direct action pathways of BR as microbial signaling molecules, and develop efficient BR-microbial compound preparations in combination with microbial community engineering, providing innovative strategies and application solutions for the regulation of acidic soil microorganisms.
PDF
24
9
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
