接种矿区原生的丛枝菌根真菌能否减轻芒果相思树对过量锰的压力?

IF 2.8 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES
Kaio Gráculo Vieira Garcia, José de Souza Oliveira Filho, Arthur Prudêncio de Araújo Pereira, Paulo Furtado Mendes Filho
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引用次数: 0

摘要

目的 锰(Mn)在低浓度时非常重要,但在土壤和沉积物中会产生毒性,影响植物和动物。了解接种了丛枝菌根真菌(AMF)的植物是如何耐受锰的,对于应用这些微生物修复受污染的土壤至关重要。尽管各种植物物种的益处已得到公认,但评估植物与 AMF 相互作用在减轻锰毒性方面的有效性对于未记录的植物至关重要。结果尽管土壤中的菌根定殖和 AMF 孢子水平降低,但接种 AMF 产生了有益的影响,最大程度地降低了锰的毒性并促进了植物的生长。与接种了 AMF 的植物相比,未接种 400 毫克/千克锰的植物在嫩枝干重(64.9%)、叶片数量(25%)和根长(24%)方面都有显著下降。在所有锰含量水平下,AMF 接种植物根部的锰浓度都较高,这表明锰向嫩枝的运输受到了限制,从而最大限度地减少了损害,促进了植物生长。能量色散光谱法确定了 AMF 孢子中的锰、钾、磷、铁和钙,表明它们对锰的植物毒性具有保护作用,而且这种微生物在胁迫条件下具有很强的适应性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Can inoculation of native arbuscular mycorrhizal fungi from a mining area attenuate stress of Acacia mangium Willd. to excess manganese?

Can inoculation of native arbuscular mycorrhizal fungi from a mining area attenuate stress of Acacia mangium Willd. to excess manganese?

Purpose

Manganese (Mn) is crucial in low concentrations but can become toxic in soils and sediments, affecting plants and animals. Understanding how plants inoculated with arbuscular mycorrhizal fungi (AMF) tolerate Mn is crucial for the application of these microorganisms in the remediation of contaminated soils. Despite recognized benefits in various plant species, assessing plant-AMF interaction effectiveness in mitigating Mn toxicity is crucial for undocumented plants.

Methods

Acacia mangium Willd. plants were inoculated with an AMF native to a Mn mining area and grown in soil with increasing Mn levels (0, 200, and 400 mg kg−1) to evaluate the effects of inoculation on plant growth and plant-AMF association strategies to reduce Mn toxicity.

Results

Inoculation with AMF resulted in beneficial effects, minimizing Mn toxicity and enhancing plant growth, despite reduced mycorrhizal colonization and AMF spore levels in the soil. Non-inoculated plants exposed to 400 mg kg−1 of Mn exhibited significant reductions in shoot dry mass (64.9%), number of leaves (25%), and root length (24%) compared to AMF-inoculated plants. Mn concentration was higher in the roots of AMF-inoculated plants at all Mn levels, indicating a restriction in Mn transport to the shoot, thus minimizing damage and promoting plant growth. Energy-dispersive spectroscopy identified Mn, potassium, phosphorus, iron and calcium in AMF spores, suggesting their protective role against Mn phytotoxicity and adaptability of this species of microorganism under stress conditions.

Conclusion

The native AMF inoculation reduces toxicity and improves the growth of A. mangium Willd. under high levels of Mn in the soil.

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来源期刊
Journal of Soils and Sediments
Journal of Soils and Sediments 环境科学-土壤科学
CiteScore
7.00
自引率
5.60%
发文量
256
审稿时长
3.5 months
期刊介绍: The Journal of Soils and Sediments (JSS) is devoted to soils and sediments; it deals with contaminated, intact and disturbed soils and sediments. JSS explores both the common aspects and the differences between these two environmental compartments. Inter-linkages at the catchment scale and with the Earth’s system (inter-compartment) are an important topic in JSS. The range of research coverage includes the effects of disturbances and contamination; research, strategies and technologies for prediction, prevention, and protection; identification and characterization; treatment, remediation and reuse; risk assessment and management; creation and implementation of quality standards; international regulation and legislation.
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