Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
Sci Total Environ. 2023 Jul 20;883:163708. doi: 10.1016/j.scitotenv.2023.163708. Epub 2023 Apr 25.
The addition of Arbuscular mycorrhizal fungi (AMF) or bioorganic fertilizer (BOF) alone has been reported to enhance plant tolerance to heavy metals and salt stress and promote plant growth, while their synergistic effects on plant growth and rhizosphere microorganism are largely unknown. This study explored the effects of AMF (Rhizophagus intraradices), BOF and BOF + RI assisted phytoremediation on heavy metals contaminated saline soil improvement and revealed the microbial mechanism. For this purpose, a pot trial consisting of four treatments (CK, RI, BOF and BOF + RI) was carried out. The results showed that the biomass, nutrient element contents, the accumulation of heavy metals and Na of Astragalus adsurgens and soil properties were most significantly improved by BOF + RI. BOF + RI significantly impacted rhizosphere microbial diversity, abundance and community composition. Chloroflexi and Patescibacteria at the phylum level and Actinomadura, Iamia, and Desulfosporosinus at the genus level were significantly enriched in BOF + RI. Network analysis revealed that BOF + RI significantly changed the keystone and enhanced complexity and interaction. Most of the keystones had roles in promoting plant growth and stress resistance. This study suggested that phytoremediation assisted by BOF and AMF is an attractive approach to ameliorate heavy metals contaminated saline soil.
单独添加丛枝菌根真菌（AMF）或生物有机肥料（BOF）已被报道可增强植物对重金属和盐胁迫的耐受性并促进植物生长，而它们对植物生长和根际微生物的协同作用在很大程度上尚不清楚。本研究探讨了 AMF（内养根毛囊霉）、BOF 和 BOF+RI 辅助植物修复对重金属污染盐渍土改良的影响，并揭示了微生物机制。为此，进行了包括四个处理（CK、RI、BOF 和 BOF+RI）的盆栽试验。结果表明，BOF+RI 最显著地提高了甘草的生物量、养分元素含量、重金属和 Na 的积累以及土壤性质。BOF+RI 显著影响了根际微生物多样性、丰度和群落组成。在门水平上，绿弯菌门和 Patescibacteria 以及在属水平上的 Actinomadura、Iamia 和 Desulfosporosinus 明显丰富。网络分析表明，BOF+RI 显著改变了关键物种并增强了复杂性和相互作用。大多数关键物种在促进植物生长和抗胁迫方面发挥作用。本研究表明，BOF 和 AMF 辅助的植物修复是一种有吸引力的方法，可以改良重金属污染的盐渍土。
