Rhizosphere Cercozoa reflect the physiological response of wheat plants to salinity stress  

作　　者：Biao Feng Lin Chen Jinyong Lou Meng Wang Wu Xiong Ruibo Sun Zhu Ouyang Zhigang Sun Bingzi Zhao Jiabao Zhang 

机构地区：[1]State Key Laboratory of Soil and Sustainable Agriculture,Fengqiu Experimental Station of National Ecosystem Research Network of China,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]CAS Engineering Laboratory for Yellow River Delta Modern Agriculture,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China [4]Shandong Dongying Institute of Geographic Sciences,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Dongying 257000,China [5]Jiangsu Provincial Key Lab of Solid Organic Waste Utilization,Jiangsu Collaborative Innovation Center of Solid Organic Wastes,Educational Ministry Engineering Center of Resource-saving Fertilizers,Nanjing Agricultural University,Nanjing 210095,China [6]Anhui Province Key Laboratory of Farmland Conservation and Pollution Prevention,School of Resources and Environment,Anhui Agricultural University,Hefei 230036,China

出　　处：《Soil Ecology Letters》2025年第1期159-168,共10页土壤生态学快报(英文)

基　　金：financially supported by the Strategic Priority Research Program of Chinese Academy of Sciences(Grant Nos.XDA24020104,XDA28110100,XDA28020203);the National Key R&D Program of China(Grant Nos.2022YFD1500203,2022YFD1500401);the China Agriculture Research System(Grant Nos.CARS-03,CARS-52);the National Natural Science Foundation of China(Grant No.42177332);the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant No.2023325).

摘　　要：Protists are essential components of the rhizosphere microbiome,which is crucial for plant growth,but little is known about the relationship between plant growth and rhizosphere protists under salinity stress.Here we investigated wheat(Triticum aestivum L.)rhizosphere protistan communities under naturally occurring salinity(NOS)and irrigation-reduced salinity(IRS),and linked a plant salinity stress index(PSSI)to different protistan groups in a nontidal coastal saline soil.We found that the PSSI was significantly correlated with rhizosphere cercozoan communities(including bacterivores,eukaryvores,and omnivores)and that these communities were important predictors of the PSSI.Structural equation modeling suggested that root exudation-induced change in bacterial community composition affected the communities of bacterivorous and omnivorous Cercozoa,which were significantly associated with the PSSI across wheat cultivars.Network analysis indicated more complex connections between rhizosphere bacteria and their protistan predators under IRS than under NOS,implying that alleviation of salinity stress promotes the predation of specific cercozoans on bacteria in rhizospheres.Moreover,the Cercomonas directa inoculation was conducive to alleviation of salinity stress.Taken together,these results suggest that the physiological response of wheat plants to salinity stress is closely linked to rhizosphere Cercozoa through trophic regulation within the rhizosphere microbiome.

关 键 词：plant growth soil salinity rhizosphere microbiome trophic interactions PROTISTS CERCOZOA 

分 类 号：S15[农业科学—土壤学]