Zhang Zhechao, Feng Shicheng, Luo Junqing, Hao Baihui, Diao Fengwei, Li Xue, Jia Bingbing, Wang Lixin, Bao Zhihua, Guo Wei
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.
J Agric Food Chem. 2021 Mar 24;69(11):3390-3400. doi: 10.1021/acs.jafc.1c00210. Epub 2021 Mar 11.
Land degraded by salinization and alkalization is widely distributed globally and involves a wide range of ecosystem types. However, the knowledge of the indigenous microbial assemblages and their roles in various saline-alkaline soils is limited. This study demonstrated microbial assemblages in various saline-alkaline soils from different regions of Inner Mongolia and revealed the key driving factors to influence microbiome. The correlation network analysis indicates the difference in adaptability of bacterial and fungal communities under stimulation by saline-alkaline stress: fungal community shows higher tolerance, stability, and resilience to various saline-alkaline soils than a bacterial community. The keystone bacteria and fungi that have potential adaptability to various saline-alkaline environments are further identified, and they may confer benefits in restoring saline-alkaline soils by their own effects or assisting plants. For salt-rich soils in different regions, the soluble salt ion components are the major determinant to drive microbial assemblages of different saline-alkaline soils, rather than salinity. Thus, these saline-alkaline soils are clustered into sulfated, chlorinated, and soda-type saline-alkaline soils. Multivariate analysis reveals unique, dominant, and common microbial taxa in three saline-alkaline soils. This result of the conceptual mode indicates that potential roles of unique and dominant microbial taxa on regulating saline-alkaline functions are more vital.
因盐渍化和碱化而退化的土地在全球广泛分布，涉及多种生态系统类型。然而，关于原生微生物群落及其在各种盐碱土壤中的作用的了解有限。本研究展示了内蒙古不同地区各种盐碱土壤中的微生物群落，并揭示了影响微生物组的关键驱动因素。相关网络分析表明，在盐碱胁迫刺激下细菌和真菌群落的适应性差异：真菌群落对各种盐碱土壤的耐受性、稳定性和恢复力高于细菌群落。进一步鉴定了对各种盐碱环境具有潜在适应性的关键细菌和真菌，它们可能通过自身作用或协助植物在盐碱土壤恢复中发挥作用。对于不同地区的富盐土壤，可溶性盐离子成分是驱动不同盐碱土壤微生物群落的主要决定因素，而非盐度。因此，这些盐碱土壤被分为硫酸盐型、氯化物型和苏打型盐碱土壤。多变量分析揭示了三种盐碱土壤中独特、占主导地位和常见的微生物类群。概念模型的这一结果表明，独特和占主导地位的微生物类群在调节盐碱功能方面的潜在作用更为重要。
