Physiological response of Polygonum perfoliatum L. following exposure to elevated manganese concentrations
Physiological response of Polygonum perfoliatum L. following exposure to elevated manganese concentrations
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DOI：
10.1007/s11356-016-8312-7
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发表时间：
2016
影响因子：
5.8
通讯作者：
Sheng-guo Xue;Jun Wang;Chuan Wu;Song Li;W. Hartley;Hao Wu;Feng Zhu;Meng-qian Cui
中科院分区：
文献类型：
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作者：
Sheng-guo Xue;Jun Wang;Chuan Wu;Song Li;W. Hartley;Hao Wu;Feng Zhu;Meng-qian Cui
Polygonum perfoliatumL.is a Mn-tolerant plant as considered having the potential to revegetate in manganese mine wasteland. The glasshouse experiments were carried out to evaluate its tolerance and physiological response in different Mn concentrations (5, 500, 1000, 2000, 5000, and 10,000 μmol L−1). Absorption bands ofP. perfoliatumdiffered greatly in lipids, proteins, and carbohydrates. With elevated levels of Mn (5–2000 μmol L−1), absorbance changed little, which demonstrated that lower Mn concentrations had negligible influence on transport functions. As Mn concentrations in excess of 2000 μmol L−1, absorbance increased slightly but eventually decreased. Furthermore, a hydroponic culture was carried out in order to study its changes of ultrastructure with the increasing Mn concentrations (5, 1000, and 10,000 μmol L−1). Lower Mn levels with 5 and 1000 μmol L−1had no breakage function to the ultrastructure ofP. perfoliatum. However, as Mn concentration was up to 10,000 μmol L−1, visible damages began to appear, the quantity of mitochondria in root cells increased, and the granum lamellae of leaf cell chloroplasts presented a disordered state. In comparison with the controls, black agglomerations were found in the cells ofP. perfoliatumunder the controlling concentration of Mn with 1000 and 10,000 μmol L−1for 30 days, which became obvious at higher Mn concentrations. As Mn concentration was 10,000 μmol L−1, a kind of new acicular substance was developed in leaf cells and intercellular spaces, possibly indicating a resistance mechanism inP. perfoliatum.These results confirm thatP. perfoliatumshows potential for the revegetation of abandoned manganese tailings.
