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《Acta Ecologica Sinica》 2018-15
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Combined effects of artificial acid rain and Cd on the growth and fluorescence parameters of Elaeocarpus glabripetalus

XIANG Jingyin;YU Fei;YI Lita;CHEN Minsi;State Key Laboratory of Subtropical Silviculture,Zhejiang Agriculture and Forestry University;  
A pot experiment was conducted to study the effects of different acid gradients( pH 3.0 and pH 5.6),different cadmium concentrations( Cd 50 and Cd 100),and their combination( pH 3.0 + Cd 100,p H 5.6 + Cd 50 and p H 5.6 + Cd100),as well as the control treatment( CK) on the growth and physiological indexes of Elaeocarpus glabripetalus. The results showed that the addition of single acid rain significantly increased the accumulation of total biomass,promoted the distribution of root and leaf biomass,reduced the distribution of stem biomass,and reduced the cadmium content in leaves.Cadmium alone( Cd 50) significantly increased the accumulation of plant biomass and promoted the distribution of root and leaf biomass. Cd 100 inhibited biomass accumulation,but the biomass allocation was largely unaffected. Their combination promoted the distribution of root and leaf biomass,reduced the distribution of stem biomass,and reduced the root-to-shoot ratio,and p H 5.6 + Cd 100 significantly promoted the accumulation of plant biomass. There were no significant differences in the fluorescence parameters between all treatments,indicating that there was no significant effect on the PSⅡ reaction center of the plants. The accumulation of cadmium in the plant was in the order of root stem leaf. The interaction of acid rain intensity and cadmium concentration had significant effects on biomass,cadmium content,and F0. Therefore,E.glabripetalus has strong tolerance to acid rain and cadmium complex pollution.
【Fund】: 浙江省自然科学基金项目(LQ17C160004)
【CateGory Index】: S792.99
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