文献类型：期刊文献

英文题名：High-Chloride Saline Water Alters Soil Nutrient Profile and Microbial Communities in Walnut Orchard

作者：Bai, Yongchao[1] Niu, Ben[2,3] Lu, Sen[1] Pei, Dong[1]

第一作者：Bai, Yongchao

通信作者：Bai, YC[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry, Beijing, Peoples R China;[2]Northeast Forestry Univ, State Key Lab Tree Genet & Breeding, Harbin, Peoples R China;[3]Northeast Forestry Univ, Coll Life Sci, Harbin, Peoples R China

年份：2025

外文期刊名：LAND DEGRADATION & DEVELOPMENT

收录：;EI(收录号：20254719567828);Scopus(收录号：2-s2.0-105022463797);WOS:【SCI-EXPANDED(收录号:WOS:001617855500001)】；

基金：We are grateful to the Xinjiang Uygur Autonomous Region Challenge and Solution Science and Technology Program (2023-10) and the National Key Research and Development Program of China (2022YFD1000102) for financial support.

语种：英文

外文关键词：community assembly; community structure; microbial diversity; salinity stress; walnut

摘要：Salinity stress, driven by high-chloride saline water (HCW), poses a significant threat to global agriculture by impairing plant growth and altering the soil microbial communities. Although the role of microbiomes in enhancing plant salt tolerance is well documented, the specific responses of walnut (Juglans regia) root and soil microbiomes to HCW remain unexplored. This study investigated the effects of HCW on walnut leaf mineral elements, soil physicochemical properties, and the diversity and composition of bacterial and fungal communities in the root, rhizosphere, and bulk soil compartments. The results showed that HCW significantly reduced essential leaf nutrients (N, P, K, Fe, and Ca) while increasing Cl- accumulation, resulting in leaf necrosis. Soil electrical conductivity, Cl-, and Na+ levels were elevated under HCW, with notable reductions in nitrate nitrogen and increases in exchangeable calcium. Microbial analysis revealed decreased bacterial diversity in roots and rhizosphere soils under HCW, along with a shift in community composition characterized by a decline in Proteobacteria (e.g., Rhizobium) and an increase in Actinobacteria (e.g., Arthrobacter, Streptomyces). The fungal diversity remained stable, but the community structure changed, with an increased abundance of Mortierellomycota. Co-occurrence network analysis indicated simplified bacterial interactions and enhanced fungal competition in HCW. Mantel tests demonstrated that bacterial community composition was strongly correlated with Cl-, Na+, and Ca2+, whereas fungal community composition was significantly associated with NO3 -, Na+, and Ca2+. These findings highlight the targeted reshaping of walnut-associated microbiomes under chloride-dominated salinity and suggest the potential of leveraging salt-tolerant microbes to improve crop resilience in saline agriculture.