The survival strategy of plants is to adjust their functional traits to adapt to the environment.However,these traits and survival strategies of evergreen broad-leaved forest species are not well understood.This study...The survival strategy of plants is to adjust their functional traits to adapt to the environment.However,these traits and survival strategies of evergreen broad-leaved forest species are not well understood.This study examined 10 leaf functional traits(LFTs)of 70 common plant species in an evergreen broad-leaved forest in Huangshan Mountain to decipher their adaptive strategies.The phylogenetic signals of these LFTs were assessed and phylogenetically independent contrasts(PIC)and correlation analyses were carried out.LFTs were analyzed to determine their CSR(C:competitor,S:stress-tolerator,R:ruderal)strategies.The results show that plant species exhibit different leaf functional traits and ecological strategies(nine strategies were identified;the most abundant were S/CS and S/CSR strategies).Some traits showed significant phylogenetic signals,indicating the effect of phylogeny on LFTs to an extent.Trait variations among species suggest distinct adaptation strategies to environmental changes.The study species were mainly clustered on the C-S strategy axis,with a high S component.Species leaning toward the C-strategy end(e.g.,deciduous species),favored a resource acquisition strategy characterized by higher specific leaf area(SLA),greater nutrient contents(N and P),lower leaf dry matter content(LDMC),and reduced nutrient utilization efficiency(C:N and C:P).Conversely,species closer to the S-strategy end(e.g.,evergreen species)usually adopted a resource conservative strategy with trait combinations contrary to those of C-strategy species.Overall,this study corroborated the applicability of the CSR strategy at a local scale and provides insights into the varied trait combinations and ecological strategies employed by plant species to adapt to their environment.These findings contribute to a better understanding of the mechanisms involved in biodiversity maintenance.展开更多
While the alerting effects of microbe-induced plant volatiles(MIPVs)to biotic stressors have been extensively studied,the ecological functions of MIPVs responding to abiotic stressors have received less attention.Usin...While the alerting effects of microbe-induced plant volatiles(MIPVs)to biotic stressors have been extensively studied,the ecological functions of MIPVs responding to abiotic stressors have received less attention.Using an interplant communication assay setup,we employed Phytolacca americana as a study species to investigate whether heavy metal-induced MIPVs released by the emitter plants contribute to metal tolerance in neighboring receiver plants.We found that high levels of manganese(Mn)stress increased the total MIPV emissions of plants cultivated in non-sterilized soil,in contrast to volatile organic compounds emitted by plants in sterilized soil.MIPVs produced by the Mn-stressed plants notably altered the hormonal profiles of the receiver plants,leading to increased similarity in soil microbial assembles and modification of competitive,stress-tolerant,ruderal strategies.Consequently,the receiver plants exhibited enhanced tolerance to subsequent Mn stress,as evidenced by improved growth performance,increased antioxidant enzyme activities and reduced membrane damage.By unraveling the mechanism underlying MIPV-mediated tolerance priming for neighboring plants,we reveal a key signal role of soil microorganisms involved in plant-plant communication.This study represents one of the initial efforts to elucidate the alerting effects of MIPVs induced by heavy metal stress on neighboring plants and its ecological consequences.展开更多
基金supported by the Special Foundation for National Science and Technology Basic Resources Investigation of China(2019FY202300)the Biodiversity Survey,Observation and Assessment Project of the Ministry of Ecology and Environment(2110404).
文摘The survival strategy of plants is to adjust their functional traits to adapt to the environment.However,these traits and survival strategies of evergreen broad-leaved forest species are not well understood.This study examined 10 leaf functional traits(LFTs)of 70 common plant species in an evergreen broad-leaved forest in Huangshan Mountain to decipher their adaptive strategies.The phylogenetic signals of these LFTs were assessed and phylogenetically independent contrasts(PIC)and correlation analyses were carried out.LFTs were analyzed to determine their CSR(C:competitor,S:stress-tolerator,R:ruderal)strategies.The results show that plant species exhibit different leaf functional traits and ecological strategies(nine strategies were identified;the most abundant were S/CS and S/CSR strategies).Some traits showed significant phylogenetic signals,indicating the effect of phylogeny on LFTs to an extent.Trait variations among species suggest distinct adaptation strategies to environmental changes.The study species were mainly clustered on the C-S strategy axis,with a high S component.Species leaning toward the C-strategy end(e.g.,deciduous species),favored a resource acquisition strategy characterized by higher specific leaf area(SLA),greater nutrient contents(N and P),lower leaf dry matter content(LDMC),and reduced nutrient utilization efficiency(C:N and C:P).Conversely,species closer to the S-strategy end(e.g.,evergreen species)usually adopted a resource conservative strategy with trait combinations contrary to those of C-strategy species.Overall,this study corroborated the applicability of the CSR strategy at a local scale and provides insights into the varied trait combinations and ecological strategies employed by plant species to adapt to their environment.These findings contribute to a better understanding of the mechanisms involved in biodiversity maintenance.
基金financially supported by the National Key Research and Development Program of China(grant no.2022YFC2601100)the National Natural Science Foundation of China(grant nos U2102218,and 32001204)+2 种基金the Science and Technology Department of Shanghai(grant no.23015810100)the Department of Science and Technology of Yunnan Province(grant no.202405AS350011)the Yunnan Fundamental Research Projects(grant no.202501AS070069).
文摘While the alerting effects of microbe-induced plant volatiles(MIPVs)to biotic stressors have been extensively studied,the ecological functions of MIPVs responding to abiotic stressors have received less attention.Using an interplant communication assay setup,we employed Phytolacca americana as a study species to investigate whether heavy metal-induced MIPVs released by the emitter plants contribute to metal tolerance in neighboring receiver plants.We found that high levels of manganese(Mn)stress increased the total MIPV emissions of plants cultivated in non-sterilized soil,in contrast to volatile organic compounds emitted by plants in sterilized soil.MIPVs produced by the Mn-stressed plants notably altered the hormonal profiles of the receiver plants,leading to increased similarity in soil microbial assembles and modification of competitive,stress-tolerant,ruderal strategies.Consequently,the receiver plants exhibited enhanced tolerance to subsequent Mn stress,as evidenced by improved growth performance,increased antioxidant enzyme activities and reduced membrane damage.By unraveling the mechanism underlying MIPV-mediated tolerance priming for neighboring plants,we reveal a key signal role of soil microorganisms involved in plant-plant communication.This study represents one of the initial efforts to elucidate the alerting effects of MIPVs induced by heavy metal stress on neighboring plants and its ecological consequences.
