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| 丛枝菌根真菌缓解微塑料对玉米生物量和抗氧化酶的毒性 |
| Arbuscular mycorrhizal fungi alleviated the toxicities of microplastics to biomass and antioxidant enzymes of Zea mays L. |
| 投稿时间：2024-06-19 |
| DOI：10.13254/j.jare.2024.0430 |
| 中文关键词: 丛枝菌根真菌 微塑料 根系 抗氧化酶系统 |
| 英文关键词: arbuscular mycorrhizal fungi microplastics root system antioxidant enzyme system |
| 基金项目:云南省基础研究计划项目面上项目（202401AT070251）；云南省基础研究计划项目青年项目（202301AU070114）；云南农业大学科研启动基金项目（KY2022-62） |
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| 中文摘要: |
| 为了探究丛枝菌根真菌（AMF）在聚乙烯（PE）、聚氯乙烯（PVC）和聚乳酸（PLA）处理下对玉米的毒性，本研究设置接种和未接种AMF两种情况，PE、PVC和PLA三种微塑料占土壤质量比0.1%、1%和10%三个浓度，进行玉米盆栽试验。结果表明：AMF的侵染率在微塑料处理下显著增加了39.31%~84.83%。微塑料处理下玉米根直径降低了13.46%~34.62%，根体积降低了16.30%~44.02%，接种AMF后玉米根直径和根体积显著增加了26.69%~88.23%和19.31%~29.52%。玉米地上干质量在微塑料处理下显著降低了 17.49%~48.13%，接种 AMF后显著增加了 77.62%~166.67%；玉米丙二醛（MDA）含量在微塑料处理下显著增加了 37.99%~149.03%，接种 AMF 后显著降低了 29.00%~60.47%。PE 只有在高浓度（10%）下才会对玉米产生毒害，而 PVC 和 PLA 在中高浓度（1%和10%）下就抑制玉米根系生长；由于微塑料促进了AMF对玉米的侵染，接种AMF后有效提高了玉米对微塑料的耐性，而降低了玉米的 MDA 含量，提高了超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、过氧化物酶（POD）活性，增加了生物量。研究表明，AMF能缓解微塑料对玉米的毒性效应，但这与微塑料的类型和浓度有关。 |
| 英文摘要: |
| It aims to research the toxicities of the arbuscular mycorrhizal fungi（AMF）on maize under polyethylene（PE）, polyvinyl chloride （PVC）and polylactic acid（PLA）treatments. A pot experiment was conducted to maize in soil with ratio to soil mass of 0.1%, 1% and 10% concentrations of PE, PVC and PLA under inoculated and uninoculated AMF. The results showed that the infection rate of AMF was significantly increased by 39.31%-84.83% under microplastics treatments. PE, PVC and PLA all decreased maize root diameter 13.46%- 34.62% and root volume 16.30%-44.02%, which was significantly increased by 26.69%-88.23% and 19.31%-29.52% under inoculation with AMF. Shoot dry weight of maize was significantly decreased by 17.49% - 48.13% under microplastic treatments and significantly increased 77.62%-166.67% under inoculation with AMF. MDA content of maize was significantly increased by 37.99%-149.03% under microplastic treatments, which was significantly decreased by 29.00%-60.47% under inoculation with AMF. Toxic effect to maize roots produced under PE only at high concentrations（10%）treatment, while maize roots growth inhibited under PVC and PLA at medium and high concentrations（1% and 10%）treatments. AMF can effectively enhance the tolerance of maize to microplastics, which result in the MDA content of maize leaves decrease, and SOD, CAT and POD enzyme activities and biomass increase. Therefore AMF can alleviate the toxicities of microplastics on maize, but it is related to the type and concentration of microplastics. |
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