Dong Jing, Wu Feibo, Huang Rgui, Zang Guoping
Department of Agronomy, Huajiachi Campus, Zhejiang University, Hangzhou, PR China.
Int J Phytoremediation. 2007 May-Jun;9(3):167-79. doi: 10.1080/15226510701375978.
In this paper, a kind of Typhaceae plant species, Typha angustifolia L, with a high tolerance to Cr is described. Experiments were carried out to examine its ability to tolerant Cr and its physiological response. The results showed that there was no difference in growth, plant height, and biomass response to external Cr (VI) between the plants exposed to 100 microM Cr (VI) and control (0 microM), while increasing Cr levels to 200-800 microM induced a significant decrease in plant height and biomass, but no significant injury was detected, even for the plants exposed to 800 microM Cr. Chromium induced significant increases in superoxide dismutase (SOD) and peroxidase (POD) activities. Meanwhile, a significantly positive correlation was found between Cr and Mn or Cu in leaves and roots, respectively. The Cr tolerance of the plant appeared to be associated with the enhancement of SOD and POD activities and the improvement in uptake and translocation of the essential microelements.
本文描述了一种对铬具有高耐受性的香蒲科植物物种——狭叶香蒲。开展了实验以检测其耐受铬的能力及其生理反应。结果表明，暴露于100微摩尔铬（VI）的植株与对照（0微摩尔）植株在生长、株高和生物量对外部铬（VI）的反应方面没有差异，而将铬水平提高到200 - 800微摩尔会导致株高和生物量显著下降，但即使是暴露于800微摩尔铬的植株也未检测到明显损伤。铬诱导超氧化物歧化酶（SOD）和过氧化物酶（POD）活性显著增加。同时，分别在叶片和根部发现铬与锰或铜之间存在显著正相关。该植物对铬的耐受性似乎与SOD和POD活性的增强以及必需微量元素吸收和转运的改善有关。
