Invasive alien plant species(IAPS)pose severe threats to global biodiversity conservation.Effective management of IAPS requires mapping their distribution and identifying the environmental factors that drive their spr...Invasive alien plant species(IAPS)pose severe threats to global biodiversity conservation.Effective management of IAPS requires mapping their distribution and identifying the environmental factors that drive their spread.The Gaoligong Mountains,a renowned biodiversity hotspot in southwestern China,currently face the dual challenges of IAPS invasion and climate change.However,we know little about the distribution patterns,key environmental drivers,and sensitivity of IAPS to future climate change in this region.In this study,we mapped IAPS richness distribution and identified invasion hotspots throughout the Gaoligong Mountains.In addition,we assessed the relative importance of environmental variables in shaping the spatial distribution of IAPS richness and projected potential shifts in IAPS richness under various climate change scenarios.We identified 161 IAPS,primarily concentrated in the low-elevation tropical and subtropical regions along river valleys,forming belt-like invasion hotspots.The key factors shaping IAPS richness included disturbance complexity,elevation,seasonal precipitation,and vegetation types.Notably,IAPS richness significantly declined with increasing elevation and latitude but increased with higher disturbance complexity.Moreover,IAPS were more prevalent in grasslands and shrublands than in forested areas.Ensemble modeling of future climate scenarios predicted that the distribution of IAPS richness would shift to progressively higher elevations.These findings provide valuable insights for managing IAPS in mountainous regions that play a crucial role in global biodiversity conservation.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
Arabidopsis thaliana（A, thaliana） has long been a model species for dicotyledon study, and was the first flowering plant to get its genome completed sequenced . Although most wild A. thaliana are collected in Europe...Arabidopsis thaliana（A, thaliana） has long been a model species for dicotyledon study, and was the first flowering plant to get its genome completed sequenced . Although most wild A. thaliana are collected in Europe, several studies have found a rapid A. thaliaria west-east expansion from Central Asia . The Qinghai-Tibet Plateau （QTP） is close to Central Asia and known for its high altitude, unique environments and biodiversity . However, no wild-type A. thaliana had been either discovered or sequenced from QTP. Studies on the A. thaliana populations collected under 2000 m asl have shown that the adaptive variations associated with climate and altitudinal gradients .展开更多
基金supported by the Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(Grant No.2019QZKK0502)National Natural Science Foundation of China(Grant No.U23A20160)Shanghai Science and Technology Innovation Action Plan(Grant No.23015810100).
文摘Invasive alien plant species(IAPS)pose severe threats to global biodiversity conservation.Effective management of IAPS requires mapping their distribution and identifying the environmental factors that drive their spread.The Gaoligong Mountains,a renowned biodiversity hotspot in southwestern China,currently face the dual challenges of IAPS invasion and climate change.However,we know little about the distribution patterns,key environmental drivers,and sensitivity of IAPS to future climate change in this region.In this study,we mapped IAPS richness distribution and identified invasion hotspots throughout the Gaoligong Mountains.In addition,we assessed the relative importance of environmental variables in shaping the spatial distribution of IAPS richness and projected potential shifts in IAPS richness under various climate change scenarios.We identified 161 IAPS,primarily concentrated in the low-elevation tropical and subtropical regions along river valleys,forming belt-like invasion hotspots.The key factors shaping IAPS richness included disturbance complexity,elevation,seasonal precipitation,and vegetation types.Notably,IAPS richness significantly declined with increasing elevation and latitude but increased with higher disturbance complexity.Moreover,IAPS were more prevalent in grasslands and shrublands than in forested areas.Ensemble modeling of future climate scenarios predicted that the distribution of IAPS richness would shift to progressively higher elevations.These findings provide valuable insights for managing IAPS in mountainous regions that play a crucial role in global biodiversity conservation.
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.
基金supported by the National Natural Science Foundation of China (91131901)the specimen platform of China (teaching specimens sub-platform) and PSCIRT project
文摘Arabidopsis thaliana（A, thaliana） has long been a model species for dicotyledon study, and was the first flowering plant to get its genome completed sequenced . Although most wild A. thaliana are collected in Europe, several studies have found a rapid A. thaliaria west-east expansion from Central Asia . The Qinghai-Tibet Plateau （QTP） is close to Central Asia and known for its high altitude, unique environments and biodiversity . However, no wild-type A. thaliana had been either discovered or sequenced from QTP. Studies on the A. thaliana populations collected under 2000 m asl have shown that the adaptive variations associated with climate and altitudinal gradients .
