重金属胁迫下6种植物展叶过程对环境积温的响应

打开文本图片集

中图分类号：S771.8 文献标识码：A DOI： 10.7525/j.issn.1006-8023.2025.06.015

Abstract：Inorderto study the relationship between the growth and development ofnativeplantsand theaccumulated temperature of the environment underthecompound heavy metals stress，a pot experiment wasconducted to analyze the response of the leaf expansion process of six plants to the active accumulated temperature （ AAT ）and daily temperature difference accumulated temperature （ DAT ）under the stress of seven mixed heavy metals by setting three concentration gradients.A Logistic growth curve with accumulated temperature as the independent variable was established.The results showedthat the leaf areaconstantsof six plants underdiferentconcentrationsof heavy metals stress were significantlydifferent fromthoseof thecontrol group.There were significant diferences betweenthe leaf areagrowth of the six plants inthecontrol groupand the leafarea growthof theplants under diferent concentrations ofheavy metal stresThe relative leaf area of the six plants in the control group， AAT and DAT were in accordance with the Logistic growth curve， but the overall fitting degree （ R2 ）of theese model in the heavy metals stress groups was poor and the prediction accuracy was low.In particular，the R2 of the relative leaf area- ⋅AAT fitting model of the low concentration treatment was only 0.2654forFicus tikoua，ndicatingthattheheavymetalstressignificantlyinterferedwiththenormalgrowthprocessof theplant.Theleaf area-accumulated temperatureLogistic growth model can better reflectthe growth diference of leaf areaunder environmental stressduring theleaf expansion periodof plants.Theresearch resultscan provide scientific reference for the screening and cultivation of ecological restoration seedlings in mining areas.

基金项目：贵州省科技支撑项目（黔科合支撑[2021]一般457）；贵州省科技计划项目（黔科合服企[2023]009）。（剩余22415字）