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| Effects of phosphorus and cadmium interaction on cadmium subcellular distribution and physiological characteristics in Avicennia marina(Forsk.) Vierh seedlings |
| Received:September 01, 2017 |
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| KeyWord:phosphorus;cadmium;Avicennia marina(Forsk.) Vierh;subcellular distribution;physiological characteristics |
| Author Name | Affiliation | E-mail | | WANG Lan | School of Agriculture and Forestry Engineering and Planning, Tongren University, Tongren 554300, China | | | DAI Min-yue | College of the Environment & Ecology, Xiamen University, Xiamen 361102, China | | | YAN Chong-ling | College of the Environment & Ecology, Xiamen University, Xiamen 361102, China | ycl@xmu.edu.cn |
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| Abstract: |
| A hydroponic experiment was carried out to study the effects of phosphorus and cadmium interaction on cadmium subcellular distribution and physiological characteristics in Avicennia marina(Forsk.) Vierh seedlings. Avicennia marina seedlings were used as the test materials. Four extraction methods; differential speed centrifugation, nitroblue tetrazolium, guaiacol, spectrophotometry and coomassie, were respectively adopted to determine the activity of SOD and POD, together with the chlorophyll and protein content. The results showed that increased Cd level in the medium caused a significant increase of Cd concentration in all fractions of leaves and roots, with most accumulation in the cell wall and soluble fraction. The content of Cd in roots was significantly higher than that in leaves, accounting for 65.23%~96.92%. Cellular compartmentation was one of the Cd detoxification mechanisms. Phosphorous could promote Cd transfer to the vacuole. With increasing P level, SOD, POD activities, chlorophyll and protein content also increased to alleviate the toxicity of Cd in A. marina seedlings to a certain extent, and thus increased the Cd tolerance of A. marina seedlings. |
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