Arbuscular mycorrhizae(AM)fungi affect nutrient uptake for host plants,while it is unclear how AM fungi interacting with soil litter affect plant growth and nutrient utilization through mycorrhizal networks in karst s...Arbuscular mycorrhizae(AM)fungi affect nutrient uptake for host plants,while it is unclear how AM fungi interacting with soil litter affect plant growth and nutrient utilization through mycorrhizal networks in karst soil of deficient nutrients beyond the rhizosphere.An experiment was conducted in a microcosm composed of a planting compartment for Cinnamomum camphora seedlings with or without Glomus mosseae fungus(M+vs.M−)and an adjacent litter compartment containing or not containing additional litter material of Arthraxon hispidus(L+vs.L−),where the compartments are connected either by nylon mesh of 20μm or 0.45μm which either allow available mycorrhizal networks within the litter compartment or prevent mycelium entering into the litter compartment(N+vs.N−).Plant biomass and nutrients were measured.The results showed that the addition of litter changed the symbiotic process in mycorrhizal colonization,spore,and hyphal density,which when in association with the host plant then affected the biomass,and accumulations of N(nitrogen)and P(phosphorus)in the individual plant as well as root,stem,and leaf respectively.AM fungi increased N and P accumulations and N/P ratio in individual plants and plant tissues.A decrease of the N/P ratio of the individual plant was observed when AM fungus interacted significantly with litter through mycorrhizal networks in the litter compartment.The results indicate that the C.camphora seedlings benefited from litter in nutrient utilization of N and P through the vary of N/P ratio when accessing mycorrhizal networks.These findings suggest that mycorrhizal networks interacting with litter improve growth and nutrients of N and P for plants through the vary of N/P ratio in order to alleviate nutrient limitation under karst soil.展开更多
Litter is the crucial carrier of soil nutrition transformation.The influence of arbuscular mycorrhizal(AM)fungi on nutrient acquisition in plants has been widely recognized.However,in nutrient-deficient karst habitat,...Litter is the crucial carrier of soil nutrition transformation.The influence of arbuscular mycorrhizal(AM)fungi on nutrient acquisition in plants has been widely recognized.However,in nutrient-deficient karst habitat,how competitive plants utilize nutrients regulated by AM fungi via litter remain largely unknown.The experimental treatments included the inoculation with or without Glomus etunicatum,the litter addition by the mixed leaves of Broussonetia papyrifera and Carpinus pubescens or no addition,and the competition through the intraspecific competition of B.papyrifera and C.pubescens,respectively,and the interspecific competition mixed both plants.AM fungi differently affected plant on nutrient acquisition,increasing nutrients acquisitions of B.papyrifera in intra-and interspecific competitions while decreasing for C.pubescens.Litter presented opposite influences on N acquisitions of both plants in interspecific competition with AM fungi,being positive for C.pubescens and negative for B.papyrifera,respectively.Under the interaction of AM fungi and litter,nitrogen(N),phosphorus(P)and potassium(K)acquisitions by B.papyrifera and N acquisition by C.pubescens in interspecific competition were all greater than intraspecific competition.In the interspecific competition,the competitive ability of plants on nutrient absorption presented significant species difference,which of B.papyrifera on P and K was significantly increased,while was converse for C.pubescens on K.In conclusion,these results suggest that the interspecific competition presents greater nutrient facilitation compared with intraspecific competition through AM fungi interacting with litter for plants in karst soil.展开更多
基金This study was supported by the National Natural Science Foundation of China(NSFC:31660200,31660156,31360106,31700539)the First-class Disciplines Program on Ecology of Guizhou Province(GNYL[2017]007)+3 种基金the Guizhou High level(Hundred-level)Innovative Talents Project(Qian-ke-he platform talents[2020]6004)the Provincial Key Technologies R&D Program of Guizhou Province of China(NY[2014]3029,[2016]Zhi-cheng 2805)the Talent-platform Program of Guizhou Province([2017]5788,[2018]5781)the Doctor starts Fund Project of Guizhou University of Traditional Chinese Medicine([2020]15).
文摘Arbuscular mycorrhizae(AM)fungi affect nutrient uptake for host plants,while it is unclear how AM fungi interacting with soil litter affect plant growth and nutrient utilization through mycorrhizal networks in karst soil of deficient nutrients beyond the rhizosphere.An experiment was conducted in a microcosm composed of a planting compartment for Cinnamomum camphora seedlings with or without Glomus mosseae fungus(M+vs.M−)and an adjacent litter compartment containing or not containing additional litter material of Arthraxon hispidus(L+vs.L−),where the compartments are connected either by nylon mesh of 20μm or 0.45μm which either allow available mycorrhizal networks within the litter compartment or prevent mycelium entering into the litter compartment(N+vs.N−).Plant biomass and nutrients were measured.The results showed that the addition of litter changed the symbiotic process in mycorrhizal colonization,spore,and hyphal density,which when in association with the host plant then affected the biomass,and accumulations of N(nitrogen)and P(phosphorus)in the individual plant as well as root,stem,and leaf respectively.AM fungi increased N and P accumulations and N/P ratio in individual plants and plant tissues.A decrease of the N/P ratio of the individual plant was observed when AM fungus interacted significantly with litter through mycorrhizal networks in the litter compartment.The results indicate that the C.camphora seedlings benefited from litter in nutrient utilization of N and P through the vary of N/P ratio when accessing mycorrhizal networks.These findings suggest that mycorrhizal networks interacting with litter improve growth and nutrients of N and P for plants through the vary of N/P ratio in order to alleviate nutrient limitation under karst soil.
基金supported by the National Natural Science Foundation of China(NSFC,31660156,31360106)the First-Class Disciplines Program on Ecology of Guizhou Province(GNYL[2017]007)+2 种基金the Guizhou Hundred-Level Innovative Talents Project(Qian-ke-he platform talents[2020]6004)the Science and Technology Project of Guizhou Province([2021]General-455,[2016]Supporting-2805)the Talent-platform Program of Guizhou Province([2017]5788,[2018]5781).
文摘Litter is the crucial carrier of soil nutrition transformation.The influence of arbuscular mycorrhizal(AM)fungi on nutrient acquisition in plants has been widely recognized.However,in nutrient-deficient karst habitat,how competitive plants utilize nutrients regulated by AM fungi via litter remain largely unknown.The experimental treatments included the inoculation with or without Glomus etunicatum,the litter addition by the mixed leaves of Broussonetia papyrifera and Carpinus pubescens or no addition,and the competition through the intraspecific competition of B.papyrifera and C.pubescens,respectively,and the interspecific competition mixed both plants.AM fungi differently affected plant on nutrient acquisition,increasing nutrients acquisitions of B.papyrifera in intra-and interspecific competitions while decreasing for C.pubescens.Litter presented opposite influences on N acquisitions of both plants in interspecific competition with AM fungi,being positive for C.pubescens and negative for B.papyrifera,respectively.Under the interaction of AM fungi and litter,nitrogen(N),phosphorus(P)and potassium(K)acquisitions by B.papyrifera and N acquisition by C.pubescens in interspecific competition were all greater than intraspecific competition.In the interspecific competition,the competitive ability of plants on nutrient absorption presented significant species difference,which of B.papyrifera on P and K was significantly increased,while was converse for C.pubescens on K.In conclusion,these results suggest that the interspecific competition presents greater nutrient facilitation compared with intraspecific competition through AM fungi interacting with litter for plants in karst soil.
