Hao Shangyan, Tian Ye, Lin Zhiqing, Xie Linzhi, Zhou Xinbin, Bañuelos Gary S
College of Resources and Environment, Southwest University, Chongqing, China.
Department of Environmental Sciences, Southern Illinois University, Edwardsville, IL, United States.
Front Plant Sci. 2024 Apr 5;15:1327649. doi: 10.3389/fpls.2024.1327649. eCollection 2024.
Arsenic (As) accumulation in plants is a global concern. Although the application of arbuscular mycorrhizal fungi (AMF) has been suggested as a potential solution to decrease As concentration in plants, there is currently a gap in a comprehensive, quantitative assessment of the abiotic and biotic factors influencing As accumulation. A meta-analysis was performed to quantitatively investigate the findings of 76 publications on the impacts of AMF, plant properties, and soil on As accumulation in plants. Results showed a significant dose-dependent As reduction with higher mycorrhizal infection rates, leading to a 19.3% decrease in As concentration. AMF reduced As(V) by 19.4% but increased dimethylarsenic acid (DMA) by 50.8%. AMF significantly decreased grain As concentration by 34.1%. AMF also improved plant P concentration and dry biomass by 33.0% and 62.0%, respectively. The most significant reducing effects of As on AMF properties were seen in single inoculation and experiments with intermediate durations. Additionally, the benefits of AMF were significantly enhanced when soil texture, soil organic carbon (SOC), pH level, Olsen-P, and DTPA-As were sandy soil, 0.8%-1.5%, ≥7.5, ≥9.1 mg/kg, and 30-60 mg/kg, respectively. AMF increased easily extractable glomalin-related soil protein (EE-GRSP) and total glomalin-related soil protein (T-GRSP) by 23.0% and 28.0%, respectively. Overall, the investigated factors had significant implications in developing AMF-based methods for alleviating the negative effects of As stress on plants.
植物中砷（As）的积累是一个全球关注的问题。尽管有人提出应用丛枝菌根真菌（AMF）作为降低植物中砷浓度的潜在解决方案，但目前在对影响砷积累的非生物和生物因素进行全面、定量评估方面仍存在差距。进行了一项荟萃分析，以定量研究76篇关于AMF、植物特性和土壤对植物中砷积累影响的出版物的研究结果。结果表明，随着菌根感染率的提高，砷的减少具有显著的剂量依赖性，导致砷浓度降低了19.3%。AMF使五价砷（As(V)）降低了19.4%，但使二甲基砷酸（DMA）增加了50.8%。AMF使谷物中的砷浓度显著降低了34.1%。AMF还分别使植物的磷浓度和干生物量提高了33.0%和62.0%。在单接种和中等持续时间的实验中，观察到砷对AMF特性的最大显著降低作用。此外，当土壤质地、土壤有机碳（SOC）、pH值、 Olsen-P和DTPA-As分别为砂土、0.8%-1.5%、≥7.5、≥9.1 mg/kg和30-60 mg/kg时，AMF的益处显著增强。AMF使易提取的球囊霉素相关土壤蛋白（EE-GRSP）和总球囊霉素相关土壤蛋白（T-GRSP）分别增加了23.0%和28.0%。总体而言，所研究的因素对于开发基于AMF的方法以减轻砷胁迫对植物的负面影响具有重要意义。
