Roxana P Colombo, Vanesa A Silvani, Matias E Benavidez, Adalgisa Scotti, Alicia M Godeas
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引用次数: 0
摘要
丛枝菌根真菌(AMF)具有不同的生物机制,可缓解重金属(HMs)污染土壤中的压力条件。这些机制在受控/温室条件下得到了广泛评估,但在试点或地区范围内却鲜有研究。本研究的目的是评估从不同污染历史的土壤中分离出的两种根瘤菌(Rhizophagus intraradices)菌株对生长在充满人工 HMs 污染基质的工程植物净化模块中的 Senecio bonariensis 植物的反应。接种了 GC3 菌株的植物吸收了少量的 HMs,并将其转移到嫩枝生物量中。当接种 GB8 菌株时,重金属(Mg、Zn、Mn、Cr、Cu 和 Ni)和宏量营养元素(Ca、K、S 和 P)在 S. bonariensis 根部积累,限制了它们向嫩枝的转移。未接种的植株表现出所有研究元素向嫩枝组织的高转移率。总之,测试的 R. intraradices 菌株在极高浓度的 HMs 毒性条件下表现出不同的植物保护机制。此外,在如此高的技术就绪水平上开发该检测方法是对该研究领域的新贡献。
Different behavior of two strains of the arbuscular mycorrhizal fungus Rhizophagus intraradices on Senecio bonariensis Hook. & Arn. against heavy metal soil pollution: a pilot-scale test.
Arbuscular mycorrhizal fungi (AMF) have different biological mechanisms to alleviate stressful conditions in heavy metals (HMs) polluted soil. These mechanisms were widely assessed under controlled/greenhouse conditions, but scarcely studied at pilot or territory scale. The aim of this study was to evaluate the response of two Rhizophagus intraradices strains isolated from soils with different histories of pollution, in association with Senecio bonariensis plants, growing in an engineering vegetal depuration module filled with artificially HMs polluted substrate. Plants inoculated with GC3 strain uptook low amounts of HMs and translocated them to shoot biomass. Heavy metals (Mg, Zn, Mn, Cr, Cu and Ni) and macronutrients (Ca, K, S and P) were accumulated in roots of S. bonariensis when inoculated with GB8 strain, limiting their translocation to the shoot. Uninoculated plants showed high translocation of all studied elements to shoot tissues. Concluding, tested R. intraradices strains have exhibited different phytoprotection mechanisms under extremely toxic concentrations of HMs. Moreover, the development of the assay at such a high Technological Readiness Level represents a novel contribution in this field of study.
期刊介绍:
The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.