Influences of Stress Treatment of Pb Tailings Sand on the Seedling of Mirabilis jalapa L.and Pb Tolerance Ability in Different Volume Fraction
《北方园艺》[ISSN:1001-0009/CN:23-1247/S]
- Issue:
- 2018年19
- Page:
- 83-88
- Research Field:
- Publishing date:
Info
- Title:
- Influences of Stress Treatment of Pb Tailings Sand on the Seedling of Mirabilis jalapa L.and Pb Tolerance Ability in Different Volume Fraction
- Author(s):
- GE Haixiang; BAI Yuansheng; HAN Yulin
- (Art College,Jiangxi University of Finance and Economics,Nanchang,Jiangxi 330032)
- Keywords:
- lead (Pb) tailing sand; Mirabilis jalapa L.; stress; tolerance
- PACS:
- -
- DOI:
- 10.11937/bfyy.20180488
- Abstract:
- The seedling of Mirabilis jalapa L.was taken as experimental material,and the soil culture experiment was carried out to analyze its growth and physiological index in Pb tailings sand substrate with different concentration at 0%,25%,50%,75% and 100%.The results showed that the plant height,root length and tolerance index of seedlings tended to decrease with the increase of the volume fraction of Pb tailings sand,and they were lower than those of the control.Meanwhile,with the increase of the volume fraction of Pb tailings sand,the content changes of Chl a,Chl b and Car in the seedling leaves were consistent with those of the growth index.However,the content of photosynthetic pigments was significantly different from those of the control under the stress of pure Pb (P<0.05).It was decreased by 92.1%,89.8% and 82.6% respectively.Under the stress treatment of pure Pb tailings sand,the relative conductivity of above-ground and under-ground parts of seedlings were significantly higher than those of the control (P<0.05).It was increased by 26.01% and 10.55% respectively.Under the stress treatment of Pb tailings sand,the content of GSH in the overground part of seedlings was increased with low volume Pb and decreased with high volume Pb.Under the stress treatment of 50% Pb,the content changes of MDA and ASA in above-ground part of the seedlings was significant,while the content of MDA,ASA and GSH did not change regularly.To sum up,Mirabilis jalapa L.had a certain tolerance to the low volume fraction of Pb tailings sand,which provides a theoretical basis for the research of the restoration of mild Pb pollution.
Last Update: 2018-11-07