[1]DAI Xuebin,XU Yuxing,DENG Yi,et al.Effects of Soil Acid Stress on Growth Physiology and Cadmium Enrichment Characteristics of Lolium perenne[J].Research of Soil and Water Conservation,2021,28(06):389-396.
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Effects of Soil Acid Stress on Growth Physiology and Cadmium Enrichment Characteristics of Lolium perenne
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 06
Page number:
389-396
Column:
Public date:
2021-10-10
- Title:
- Effects of Soil Acid Stress on Growth Physiology and Cadmium Enrichment Characteristics of Lolium perenne
- Keywords:
- Lolium perenne; Cd enrichment; acid stress; phytoremediation
- CLC:
- S153; X53
- DOI:
- -
- Abstract:
- This study was to explore the tolerance of Lolium perenne to acid stress and the feasibility of remediation of Cd contaminated soil. A pot experiment was conducted to study the effects of different soil acid stresses on seed germination，plant growth physiological characteristics and Cd enrichment characteristics of Lolium perenn. The results showed that higher level of soil acid stress(pH 4.0)significantly inhibited the seed germination，plant growth physiology and Cd enrichment capacity of Lolium perenn; when the soil pH value was 4.0，seed germination potential，germination rate，plant height，root length，aboveground biomass，underground biomass，total biomass，total chlorophyll and root vigor were the lowest，MDA contents in leaves and roots were the highest，the ultrastructure of root cells was seriously damaged，and the Cd content and enrichment coefficient of shoot and root were the lowest; lower level of soil acid stress(pH 4.5～6.0)could promote the germination potential and germination rate of Lolium perenn; there was no significant difference in root length，underground biomass and root-shoot ratio under low soil acid stress(pH 4.5～6.0)，and the plants grew well; with the increase of soil pH value，the total chlorophyll content and root vigor of Lolium perenn increased significantly，and the MDA contents of leaves and roots decreased significantly; when the soil pH value was 6.0，the structure of cell wall，cell membrane，cell matrix and mitochondria of root was complete and clear; Cd content and enrichment coefficient of Lolium perenn differed significantly under different soil acid stresses，and soil pH value was more favorable for Cd enrichment under the condition of moderate weak acidity(pH 4.5 and pH 5.0). The Cd accumulation ability of root was higher than that of shoot. These results showed that Lolium perenn had strong tolerance to soil acid stress，and had great potential in phytoremediation of Cd contaminated soil under acidic soil conditions.
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Last Update:
2021-10-10