Continuous planting of euhalophyte Suaeda salsa enhances microbial diversity and multifunctionality of saline soil

作者：Shuai Zhao, Xu Liu, Samiran Banerjee, Martin Hartmann, Bin Peng, Rylie Elvers, Zhenyong Zhao, Na Zhou, Junjie Liu, Baozhan Wang, Changyan Tian, Jiandong Jiang, Tengxiang Lian · 发表于：Applied and Environmental Microbiology · 年份：2024 · DOI：10.1128/aem.02355-23 · 被引用次数：26 · 研究领域：Botanical Research and Applications、Biocrusts and Microbial Ecology、Algal biology and biofuel production

ABSTRACT Halophyte-based remediation emerges as a novel strategy for ameliorating saline soils, offering a sustainable alternative to conventional leaching methods. While bioremediation is recognized for its ability to energize soil fertility and structure, the complex interplays among plant traits, soil functions, and soil microbial diversity remain greatly unknown. Here, we conducted a 5-year field experiment involving the continuous cultivation of the annual halophyte Suaeda salsa in saline soils to explore soil microbial diversity and their relationships with plant traits and soil functions. Our findings demonstrate that a decline in soil salinity corresponded with increases in the biomass and seed yield of S. salsa , which sustained a consistent seed oil content of approximately 22% across various salinity levels. Significantly, prolonged cultivation of halophytes substantially augmented soil microbial diversity, particularly from the third year of cultivation. Moreover, we identified positive associations between soil multifunctionality, seed yield, and taxonomic richness within a pivotal microbial network module. Soils enriched with taxa from this module showed enhanced multifunctionality and greater seed yields, correlating with the presence of functional genes implicated in nitrogen fixation and nitrification. Genomic analysis suggests that these taxa have elevated gene copy numbers of crucial functional genes related to nutrient cycling. Overall, our study emphasize...