Effects of neodymium on growth and physiological characteristics of Microcystis aeruginosa
来源期刊：Journal of Rare Earths2011年第4期
论文作者：王应军 金航标 邓仕槐 陈燕
文章页码：388 - 395
摘 要：To investigate the effect of neodymium （Nd） on Microcystis aeruginosa, the growth and physiological changes were studied by lab cultured experiments. The results showed that the content of chlorophyll a （Chl-a）, soluble protein and the activity of superoxide dismutase （SOD）, peroxidase （POD）, and catalase （CAT） increased compared with the control （Nd3+-free）, and the growth of M. aeruginosa was stimulated in the treatments of initial Nd3+ concentration ≤1 mg/L; while the treatments of initial Nd3+ concentration was in the range of 5.00-10.00 mg/L, the content of malondiadehyde （MDA） increased immediately but the activity of CAT reduced, which resulted in weakened M. aeruginosa’s ability to eliminate the active oxygen and the ruin of antioxidant defense system, and stunting the growth of M. aeruginosa. With the initial Nd3+ concentration of 50 mg/L, the growth of M. aeruginosa was totally stunted. The ultrastructure showed that excess Nd3+ could lead to the decrease of thylakoid and the increase of fat particle in cells of M. aeruginosa, and the cell membrane became rough and even broken, causing an irreversible damage to algal cells.
王应军1，金航标1，邓仕槐1，陈燕1
1. College of Resources and Enviroment, Sichuan Agricultural University
摘 要：To investigate the effect of neodymium （Nd） on Microcystis aeruginosa, the growth and physiological changes were studied by lab cultured experiments. The results showed that the content of chlorophyll a （Chl-a）, soluble protein and the activity of superoxide dismutase （SOD）, peroxidase （POD）, and catalase （CAT） increased compared with the control （Nd3+-free）, and the growth of M. aeruginosa was stimulated in the treatments of initial Nd3+ concentration ≤1 mg/L; while the treatments of initial Nd3+ concentration was in the range of 5.00-10.00 mg/L, the content of malondiadehyde （MDA） increased immediately but the activity of CAT reduced, which resulted in weakened M. aeruginosa’s ability to eliminate the active oxygen and the ruin of antioxidant defense system, and stunting the growth of M. aeruginosa. With the initial Nd3+ concentration of 50 mg/L, the growth of M. aeruginosa was totally stunted. The ultrastructure showed that excess Nd3+ could lead to the decrease of thylakoid and the increase of fat particle in cells of M. aeruginosa, and the cell membrane became rough and even broken, causing an irreversible damage to algal cells.
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