Effects of snow-melting agents on roadside plants and rhizosphere soil:screening of tolerant plants
[Objective]This study aims to elucidate the effects of snow-melting agentson dominant roadside plantsand their rhizosphere soil,as well as to screen for tolerant plants.[Method]A plant quadrant survey was con-ducted,along with the collection of plant leaves,roots and rhizosphere soil samplesfrom both sides of a road in Tai-yuan City,China.Changes in saltsalt content changes in rhizosphere soil,soil enzyme activity,and resistance indexes in plant leaves and roots were investigated.[Result]1)The activities of soil sucrase,catalase,and alkaline phospha-tase in the rhizosphere ofdominant plants in the snow-melting agent(high-salinity)groups decreased compared to the control groups(low-salinity),awith negative correlations observed with salinity content.Urease activity in the rhizo-sphere of dominant roadside plants from high salinity groups decreased with increasing salinity content,although there was no correlation found.The salinity content in the rhizosphere of roadside dominant plants followed the order:Rob-inia pseudoacacia<Ilex chinensis Sims<Sedum kamtschaticum<Poa pratensis<Ligustrum lucidum.2)Chlorophyll and malondialdehyde levels in the leaves of the snow-melting agent group were lower than that in the control,while malondialdehyde levels were higher.In the snow-melting agent group,malondialdehyde contents in the leaves and roots of Sedum kamtschaticum and Ligustrum lucidum in were lower than those of Ilex chinensis Sims and Poa praten-sis.The proline and soluble protein contents in the leaves of Sedum kamtschaticum and Ligustrum lucidumininthe snow-melting agent groups were lower than those inthe control group,while the contents in Ligustrum lucidum-leaves were higher.[Conclusion]The resultssuggest that the snow-melting agent adversely affected chlorophyll synthesis,cold resistance,oxidatidative stress resistance,and water retention in cells,negatively impactingroadside soil.Stress resistance was found to be greater in Sedum kamtschaticum and Ligustrum lucidum compared to Ilex chi-nensis Sims and Poa pratensis.
万方数据
维普
