Effects of AMF inoculation on the eco-physiological characteristics of Imperata cylindrica under differing soil nitrogen conditions

作者：Tong Jia, Yue Zhang, Yushan Yao, Yu Wang, Xueli Liang, Mengyao Zheng, Lijuan Zhao, Baofeng Chai · 发表于：Frontiers in Plant Science · 年份：2023 · DOI：10.3389/fpls.2023.1134995 · 被引用次数：11 · 研究领域：Mycorrhizal Fungi and Plant Interactions、Forest Ecology and Biodiversity Studies、Plant Parasitism and Resistance

Arbuscular mycorrhizal fungi (AMF) play a key role in terrestrial ecosystems, while the ecological restoration application of AMF in mining areas has been progressively gaining attention. This study simulated a low nitrogen (N) environment in copper tailings mining soil to explore inoculative effects of four AMF species on the eco-physiological characteristics of Imperata cylindrica , and provided plant-microbial symbiote with excellent resistance to copper tailings. Results show that N, soil type, AMF species, and associated interactions significantly affected ammonium ( NH 4 + ), nitrate nitrogen ( NO 3 − ), and total nitrogen (TN) content and photosynthetic characteristics of I. cylindrica . Additionally, interactions between soil type and AMF species significantly affected the biomass, plant height, and tiller number of I. cylindrica . Rhizophagus irregularis and Glomus claroideun significantly increased TN and NH 4 + content in the belowground components I. cylindrica in non-mineralized sand. Moreover, the inoculation of these two fungi species significantly increased belowground NH 4 + content in mineralized sand. The net photosynthetic rate positively correlated to aboveground total carbon (TC) and TN content under the high N and non-mineralized sand treatment. Moreover, Glomus claroideun and Glomus etunicatum inoculation significantly increased both net photosynthetic and water utilization rates, whil...